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      <header alignment="Center" color="#a9a9a9">&amp;[DATE] &amp;[TIME] - &amp;[FILENAME]</header>
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      <p bold="true">The tangential plane and the normal to the surface</p>
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          <p>Матрица преобразования для поворота вокруг оси y</p>
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          <e type="function" args="1">OZ</e>
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          <e type="operand">2</e>
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          <e type="operand">0</e>
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          <e type="operand">13</e>
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          <e type="operand">2</e>
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          <e type="operand">2</e>
          <e type="function" args="18">mat</e>
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          <e type="operand">0</e>
          <e type="operand">0</e>
          <e type="operand" style="string">.</e>
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          <e type="operand" style="string" />
          <e type="operand">6</e>
          <e type="operand">1</e>
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          <e type="operand">6</e>
          <e type="operand">2</e>
          <e type="function" args="1">OX</e>
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          <e type="operand" style="string">X</e>
          <e type="operand">10</e>
          <e type="operand" style="string" />
          <e type="operand">6</e>
          <e type="operand">1</e>
          <e type="function" args="1">OY</e>
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          <e type="operand">6</e>
          <e type="operand">2</e>
          <e type="function" args="1">OY</e>
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          <e type="operand" style="string">y</e>
          <e type="operand">10</e>
          <e type="operand" style="string" />
          <e type="operand">13</e>
          <e type="operand">1</e>
          <e type="function" args="1">OZ</e>
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          <e type="operand">13</e>
          <e type="operand">2</e>
          <e type="function" args="1">OZ</e>
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          <e type="operand" style="string" />
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        <p>Dragilev's Method</p>
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          <e type="function" args="3">for</e>
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          <e type="operand">u</e>
          <e type="function" args="2">Jacobian</e>
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          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="operand">n</e>
          <e type="operand">n</e>
          <e type="function" args="5">submatrix</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="bracket">(</e>
          <e type="operand" style="string">матрица свободных членов</e>
          <e type="operator" args="2">≡</e>
          <e type="operand">A</e>
          <e type="operand">f</e>
          <e type="operand">u</e>
          <e type="function" args="2">Jacobian</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="function" args="5">submatrix</e>
          <e type="operator" args="2">:</e>
          <e type="bracket">(</e>
          <e type="operand" style="string">основная(квадратная) матрица</e>
          <e type="operator" args="2">≡</e>
          <e type="operand">n</e>
          <e type="operand">2</e>
          <e type="operator" args="2">&gt;</e>
          <e type="operand">det</e>
          <e type="operand">1</e>
          <e type="function" args="2">el</e>
          <e type="operand">b</e>
          <e type="operand">A</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="operand">2</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="function" args="5">submatrix</e>
          <e type="function" args="2">augment</e>
          <e type="function" args="1">det</e>
          <e type="operator" args="1">-</e>
          <e type="operator" args="2">:</e>
          <e type="bracket">(</e>
          <e type="operand" style="string">определителu дополнит.матриц</e>
          <e type="operator" args="2">≡</e>
          <e type="operand">det</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="function" args="2">el</e>
          <e type="operand">A</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="operand">2</e>
          <e type="operator" args="2">-</e>
          <e type="function" args="5">submatrix</e>
          <e type="operand">b</e>
          <e type="function" args="2">augment</e>
          <e type="function" args="1">det</e>
          <e type="operator" args="1">-</e>
          <e type="operator" args="2">:</e>
          <e type="operand">det</e>
          <e type="operand">n</e>
          <e type="function" args="2">el</e>
          <e type="operand">A</e>
          <e type="function" args="1">det</e>
          <e type="operator" args="1">-</e>
          <e type="operator" args="2">:</e>
          <e type="operand">k</e>
          <e type="operand">2</e>
          <e type="operator" args="2">:</e>
          <e type="operand">k</e>
          <e type="operand">n</e>
          <e type="operand">2</e>
          <e type="operator" args="2">-</e>
          <e type="operator" args="2">≤</e>
          <e type="operand">k</e>
          <e type="operand">k</e>
          <e type="operand">1</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">det</e>
          <e type="operand">k</e>
          <e type="function" args="2">el</e>
          <e type="operand">A</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="operand">1</e>
          <e type="operand">k</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="function" args="5">submatrix</e>
          <e type="operand">b</e>
          <e type="operand">A</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="operand">k</e>
          <e type="operand">1</e>
          <e type="operator" args="2">+</e>
          <e type="operand">n</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="function" args="5">submatrix</e>
          <e type="function" args="3">augment</e>
          <e type="function" args="1">det</e>
          <e type="operator" args="1">-</e>
          <e type="operator" args="2">:</e>
          <e type="function" args="4">for</e>
          <e type="operand">4</e>
          <e type="operand">1</e>
          <e type="function" args="6">line</e>
          <e type="operand">det</e>
          <e type="operand">1</e>
          <e type="function" args="2">el</e>
          <e type="operand">b</e>
          <e type="operator" args="2">:</e>
          <e type="operand">det</e>
          <e type="operand">n</e>
          <e type="function" args="2">el</e>
          <e type="operand">A</e>
          <e type="function" args="1">det</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" args="4">line</e>
          <e type="function" args="3">if</e>
          <e type="operand">dS</e>
          <e type="operand">det</e>
          <e type="operand">1</e>
          <e type="function" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operand">det</e>
          <e type="operand">2</e>
          <e type="function" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="operand">det</e>
          <e type="operand">3</e>
          <e type="function" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">2</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">+</e>
          <e type="function" args="1">sqrt</e>
          <e type="operator" args="2">:</e>
          <e type="operand">i</e>
          <e type="operand">1</e>
          <e type="operand">n</e>
          <e type="function" args="2">range</e>
          <e type="operand">D2</e>
          <e type="operand">i</e>
          <e type="function" args="2">el</e>
          <e type="operand">det</e>
          <e type="operand">i</e>
          <e type="function" args="2">el</e>
          <e type="operand">dS</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="2">:</e>
          <e type="function" args="3">for</e>
          <e type="operand">t</e>
          <e type="operand">x</e>
          <e type="function" args="2">D1</e>
          <e type="operand">D2</e>
          <e type="operator" args="2">:</e>
          <e type="bracket">(</e>
          <e type="operand" style="string">Матрица  правых частей  системы ОДУ</e>
          <e type="operator" args="2">≡</e>
          <e type="operand">X0</e>
          <e type="operand">tmin</e>
          <e type="operand">tmax</e>
          <e type="operand">N</e>
          <e type="operand">t</e>
          <e type="operand">x</e>
          <e type="function" args="2">D1</e>
          <e type="function" args="5">rkfixed</e>
          <e type="operand">9</e>
          <e type="operand">1</e>
          <e type="function" args="11">line</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="17" top="1944" color="#000000" bgColor="#ffffff">
      <area terminator="true" />
    </region>
  </region>
  <region id="18" left="0" top="1971" width="593" height="40" border="true" color="#000000" bgColor="#ffffff" fontSize="10">
    <text lang="eng">
      <p>The curve is given as the intersection line of two surfaces f1 and f2.It can be seen that the normal to the sphere passes through its center.</p>
    </text>
  </region>
  <region id="19" left="0" top="2043" width="288" height="62" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Right" lang="eng">
        <p>Surface 1</p>
      </description>
      <input>
        <e type="operand">f</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">x</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">4</e>
        <e type="operator" args="2">/</e>
        <e type="operand">x</e>
        <e type="operand">2</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">4</e>
        <e type="operator" args="2">/</e>
        <e type="operator" args="2">+</e>
        <e type="function" args="1">sin</e>
        <e type="operand">x</e>
        <e type="operand">3</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operand">0.7097</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="20" left="0" top="2133" width="264" height="43" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Right" lang="eng">
        <p>Surface 2</p>
      </description>
      <input>
        <e type="operand">f</e>
        <e type="operand">2</e>
        <e type="function" args="2">el</e>
        <e type="operand">x</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">2</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">x</e>
        <e type="operand">2</e>
        <e type="function" args="2">el</e>
        <e type="operand">2</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="operand">x</e>
        <e type="operand">3</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="operand">9</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="21" left="0" top="2196" width="288" height="36" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Right" lang="eng">
        <p>Kоординаты начальных точек</p>
      </description>
      <input>
        <e type="operand">X0</e>
        <e type="operand">1.496446999</e>
        <e type="operand">0.9574371296</e>
        <e type="operator" args="1">-</e>
        <e type="operand">0</e>
        <e type="operand">1</e>
        <e type="operand">3</e>
        <e type="function" args="5">mat</e>
        <e type="function" args="1">transpose</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="22" left="0" top="2250" width="68" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">tmin</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="23" left="90" top="2250" width="93" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">tmax</e>
        <e type="operand">22.8</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="24" left="207" top="2250" width="68" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">Δt</e>
        <e type="operand">0.1</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="25" left="315" top="2250" width="72" height="41" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">N</e>
        <e type="operand">tmax</e>
        <e type="operand">Δt</e>
        <e type="operator" args="2">/</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="26" left="405" top="2250" width="70" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">N</e>
      </input>
      <result action="numeric">
        <e type="operand">228</e>
      </result>
    </math>
  </region>
  <region id="27" left="0" top="2304" width="193" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Right" lang="rus">
        <p>Матрица координат    </p>
      </description>
      <input>
        <e type="operand">B</e>
        <e type="operand">X0</e>
        <e type="operand">tmin</e>
        <e type="operand">tmax</e>
        <e type="operand">N</e>
        <e type="function" args="4">D</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="28" left="0" top="2340" width="233" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">B1</e>
        <e type="operand">B</e>
        <e type="operand">1</e>
        <e type="operand">N</e>
        <e type="operand">2</e>
        <e type="operand">4</e>
        <e type="function" args="5">submatrix</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="29" left="0" top="2376" width="259" height="29" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">t</e>
        <e type="function" args="1">CM</e>
        <e type="operand">2</e>
        <e type="operand">2</e>
        <e type="operand">0</e>
        <e type="operand">1</e>
        <e type="operand">3</e>
        <e type="function" args="5">mat</e>
        <e type="operand">B1</e>
        <e type="operand">t</e>
        <e type="function" args="2">row</e>
        <e type="function" args="2">stack</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="30" left="0" top="2448" width="337" height="766" border="true" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Top" lang="eng">
        <p>The normal at a point  p  on the surface f1 is given by the gradient(Jacobian matrix)</p>
      </description>
      <input>
        <e type="operand">λn</e>
        <e type="operand">0.2</e>
        <e type="operator" args="2">:</e>
        <e type="operand">x</e>
        <e type="function" args="1">J</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operand">3</e>
        <e type="function" args="2">range</e>
        <e type="operand">m</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">f</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">x</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="2">diff</e>
        <e type="operator" args="2">:</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">line</e>
        <e type="function" args="3">for</e>
        <e type="operand">m</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" args="4">line</e>
        <e type="operator" args="2">:</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operand">B1</e>
        <e type="function" args="1">rows</e>
        <e type="function" args="2">range</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">B1</e>
        <e type="operand">k</e>
        <e type="function" args="2">row</e>
        <e type="function" args="1">transpose</e>
        <e type="operator" args="2">:</e>
        <e type="operand">p1</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">λn</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">+</e>
        <e type="operator" args="2">:</e>
        <e type="operand">N1</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">transpose</e>
        <e type="operand">p1</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">transpose</e>
        <e type="function" args="2">stack</e>
        <e type="operator" args="2">:</e>
        <e type="operand">eaxis</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">i</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operand">3</e>
        <e type="function" args="4">sum</e>
        <e type="function" args="1">sqrt</e>
        <e type="operator" args="2">/</e>
        <e type="operator" args="2">:</e>
        <e type="operand">d</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">eaxis</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">2</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">eaxis</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">3</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="function" args="1">sqrt</e>
        <e type="function" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">eaxis</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">3</e>
        <e type="function" args="2">el</e>
        <e type="operand">d</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">10</e>
        <e type="operand">15</e>
        <e type="operator" args="1">-</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="operator" args="2">/</e>
        <e type="function" args="1">acos</e>
        <e type="function" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">β2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">d</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">acos</e>
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        <e type="operand">ψ1</e>
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        <e type="function" args="2">el</e>
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        <e type="operand">k</e>
        <e type="function" args="2">el</e>
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        <e type="function" args="2">el</e>
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        <e type="operand">β2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="1">-</e>
        <e type="function" args="1">Ω2</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">Ω1</e>
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        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">2</e>
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        <e type="operand">0</e>
        <e type="operator" args="2">≥</e>
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        <e type="operand">β2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">Ω2</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">Ω1</e>
        <e type="operator" args="2">*</e>
        <e type="function" args="1">eval</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">≤</e>
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        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">2</e>
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        <e type="operand">0</e>
        <e type="operator" args="2">≤</e>
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        <e type="operator" args="2">&amp;</e>
        <e type="operand">β2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">Ω2</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="1">-</e>
        <e type="function" args="1">Ω1</e>
        <e type="operator" args="2">*</e>
        <e type="function" args="1">eval</e>
        <e type="operand">β2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="1">-</e>
        <e type="function" args="1">Ω2</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="1">-</e>
        <e type="function" args="1">Ω1</e>
        <e type="operator" args="2">*</e>
        <e type="function" args="1">eval</e>
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        <e type="function" args="3">if</e>
        <e type="function" args="3">if</e>
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        <e type="operand">Plane1</e>
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        <e type="function" args="2">el</e>
        <e type="operand">Plane</e>
        <e type="operand">ψ1</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">:</e>
        <e type="operand">9</e>
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        <e type="function" args="11">line</e>
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        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" args="5">line</e>
      </input>
    </math>
  </region>
  <region id="31" left="378" top="2448" width="337" height="766" border="true" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Top" lang="eng">
        <p>The normal at a point  p  on the surface f2  is given by the gradient(Jacobian matrix)</p>
      </description>
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        <e type="operand">λn</e>
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        <e type="function" args="1">J</e>
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        <e type="operand">N2</e>
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        <e type="operand">eaxis</e>
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        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
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        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">i</e>
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        <e type="bracket">(</e>
        <e type="operand">2</e>
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        <e type="operand">i</e>
        <e type="operand">1</e>
        <e type="operand">3</e>
        <e type="function" args="4">sum</e>
        <e type="function" args="1">sqrt</e>
        <e type="operator" args="2">/</e>
        <e type="operator" args="2">:</e>
        <e type="operand">d</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">eaxis</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">2</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">eaxis</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">3</e>
        <e type="function" args="2">el</e>
        <e type="bracket">(</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="function" args="1">sqrt</e>
        <e type="function" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">eaxis</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">3</e>
        <e type="function" args="2">el</e>
        <e type="operand">d</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">10</e>
        <e type="operand">15</e>
        <e type="operator" args="1">-</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="operator" args="2">/</e>
        <e type="function" args="1">acos</e>
        <e type="function" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">β2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">d</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">acos</e>
        <e type="function" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">ψ1</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">≥</e>
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        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">2</e>
        <e type="function" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">≥</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">&amp;</e>
        <e type="operand">β2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="1">-</e>
        <e type="function" args="1">Ω2</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">Ω1</e>
        <e type="operator" args="2">*</e>
        <e type="function" args="1">eval</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">1</e>
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        <e type="operand">0</e>
        <e type="operator" args="2">≤</e>
        <e type="bracket">(</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">2</e>
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        <e type="operand">0</e>
        <e type="operator" args="2">≥</e>
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        <e type="operator" args="2">&amp;</e>
        <e type="operand">β2</e>
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        <e type="function" args="2">el</e>
        <e type="function" args="1">Ω2</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">Ω1</e>
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        <e type="function" args="1">eval</e>
        <e type="operand">p</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">≤</e>
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        <e type="function" args="2">el</e>
        <e type="function" args="1">J</e>
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        <e type="operand">0</e>
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        <e type="function" args="2">el</e>
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        <e type="function" args="1">Ω1</e>
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        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="1">-</e>
        <e type="function" args="1">Ω2</e>
        <e type="operand">α2</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operator" args="1">-</e>
        <e type="function" args="1">Ω1</e>
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        <e type="function" args="3">if</e>
        <e type="function" args="3">if</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Plane2</e>
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        <e type="function" args="2">el</e>
        <e type="operand">Plane</e>
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        <e type="function" args="2">el</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">:</e>
        <e type="operand">9</e>
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        <e type="operand">3</e>
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        <e type="function" args="5">line</e>
      </input>
    </math>
  </region>
  <region id="32" left="9" top="3294" width="156" height="28" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">τ</e>
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        <e type="operand">B1</e>
        <e type="function" args="1">rows</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="function" args="2">range</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="33" left="27" top="3339" width="315" height="270" color="#000000" bgColor="#ffffff" fontSize="10" showInputData="False">
    <plot grid="false" axes="false" type="2d" render="lines" scale_x="5.74447917389732" scale_y="5.74447917389732" scale_z="5.74447917389732" rotate_x="0" rotate_y="0" rotate_z="0" transpose_x="-83" transpose_y="61" transpose_z="0" animate="τ" frameRate="25">
      <description active="true" position="Top" lang="eng">
        <p>The tangential plane and the normal to the surface f2</p>
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        <e type="function" args="7">mat</e>
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        <e type="operand">1</e>
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        <e type="operand">2</e>
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        <e type="operand">1</e>
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        <e type="function" args="5">mat</e>
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        <e type="operand">1</e>
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        <e type="operand" style="string">.</e>
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        <e type="operand">S</e>
        <e type="operand">γ</e>
        <e type="operator" args="2">*</e>
        <e type="operand">1</e>
        <e type="function" args="2">col</e>
        <e type="operand">S</e>
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