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      <revision>19</revision>
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      <margins left="39" right="39" top="39" bottom="39" />
      <header alignment="Center" color="#a9a9a9">&amp;[DATE] &amp;[TIME] - &amp;[FILENAME]</header>
      <footer alignment="Center" color="#a9a9a9">&amp;[PAGENUM] / &amp;[COUNT]</footer>
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  <region id="0" top="45" color="#000000" bgColor="#ffffff">
    <area collapsed="true">
      <title lang="eng">
        <p>     Circles     </p>
      </title>
    </area>
    <region id="1" left="18" top="72" width="120" height="61" color="#000000" bgColor="#ffe1e1" fontSize="10">
      <math decimalPlaces="6">
        <description active="true" position="Top" lang="eng">
          <p>Circle definition</p>
        </description>
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          <e type="operand">u</e>
          <e type="function" args="2">D</e>
          <e type="operand">u</e>
          <e type="operand">2</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">u</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operator" args="1">-</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">mat</e>
          <e type="operator" args="2">:</e>
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      </math>
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    <region id="2" left="252" top="99" width="77" height="63" color="#000000" bgColor="#ffffff" fontSize="10">
      <math decimalPlaces="6">
        <input>
          <e type="operand">t0</e>
          <e type="operand">0</e>
          <e type="operator" args="2">:</e>
          <e type="operand">t1</e>
          <e type="operand">2</e>
          <e type="operand">π</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">N</e>
          <e type="operand">200</e>
          <e type="operator" args="2">:</e>
          <e type="operand">3</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="5">line</e>
        </input>
      </math>
    </region>
    <region id="3" left="162" top="108" width="61" height="45" color="#000000" bgColor="#ffffff" fontSize="10">
      <math decimalPlaces="6">
        <input>
          <e type="operand">IC</e>
          <e type="operand">0</e>
          <e type="operand">1</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">mat</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="4" left="414" top="144" width="312" height="99" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math fractionType="fraction">
        <input>
          <e type="operand">data</e>
          <e type="function" args="1">UnestH</e>
          <e type="operand">v</e>
          <e type="operand">data</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operator" args="2">:</e>
          <e type="operand">j</e>
          <e type="operand">2</e>
          <e type="operand">data</e>
          <e type="function" preserve="true" args="1">cols</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">v</e>
          <e type="operand">v</e>
          <e type="operand">data</e>
          <e type="operand">j</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="function" preserve="true" args="2">augment</e>
          <e type="operator" args="2">:</e>
          <e type="function" preserve="true" args="3">for</e>
          <e type="operand">v</e>
          <e type="operand">3</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="5">line</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="5" left="18" top="171" width="277" height="28" color="#000000" bgColor="#e1ffff" fontSize="10">
      <math decimalPlaces="6">
        <description active="false" position="Top" lang="eng">
          <p>Either 'rkfixed' or 'Rkadapt'</p>
        </description>
        <input>
          <e type="operand">s</e>
          <e type="operand">IC</e>
          <e type="operand">t0</e>
          <e type="operand">t1</e>
          <e type="operand">N</e>
          <e type="operand">t</e>
          <e type="operand">u</e>
          <e type="function" args="2">D</e>
          <e type="function" preserve="true" args="5">rkfixed</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="6" left="18" top="207" width="115" height="49" color="#000000" bgColor="#ffffff" fontSize="10">
      <math decimalPlaces="6">
        <input>
          <e type="operand">X</e>
          <e type="operand">s</e>
          <e type="operand">2</e>
          <e type="function" preserve="true" args="2">col</e>
          <e type="operator" args="2">:</e>
          <e type="operand">Y</e>
          <e type="operand">s</e>
          <e type="operand">3</e>
          <e type="function" preserve="true" args="2">col</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
        </input>
      </math>
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    <region id="7" left="144" top="207" width="220" height="49" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">C1</e>
          <e type="operand">X</e>
          <e type="operand">Y</e>
          <e type="function" preserve="true" args="2">augment</e>
          <e type="operator" args="2">:</e>
          <e type="operand">C2</e>
          <e type="operand">0.5</e>
          <e type="operand">X</e>
          <e type="operator" args="2">*</e>
          <e type="operand">0.5</e>
          <e type="operand">Y</e>
          <e type="operator" args="2">*</e>
          <e type="function" preserve="true" args="2">augment</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
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    <region id="8" top="270" color="#000000" bgColor="#ffffff">
      <area terminator="true" />
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  <region id="9" left="36" top="315" width="68" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Right" lang="eng">
        <p>relative needles</p>
      </description>
      <input>
        <e type="operand">n</e>
        <e type="operand">2.25</e>
        <e type="operator" args="2">:</e>
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    </math>
  </region>
  <region id="10" left="270" top="315" width="73" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <description active="true" position="Right" lang="eng">
        <p>rotate the system</p>
      </description>
      <input>
        <e type="operand">β</e>
        <e type="operand">45</e>
        <e type="bracket">(</e>
        <e type="operand" style="unit">°</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="11" top="351" color="#000000" bgColor="#ffffff">
    <area collapsed="true" />
    <region id="12" left="378" top="396" width="47" height="41" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">r</e>
          <e type="operand">π</e>
          <e type="operand">n</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="13" left="450" top="405" width="132" height="27" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">s</e>
          <e type="operand">0.5</e>
          <e type="operator" args="2">:</e>
          <e type="operand">α</e>
          <e type="operand">10</e>
          <e type="operand">s</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">1</e>
          <e type="operand">2</e>
          <e type="function" preserve="true" args="4">mat</e>
        </input>
      </math>
    </region>
    <region id="14" left="234" top="432" width="89" height="99" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">z</e>
          <e type="operand">0</e>
          <e type="operand">s</e>
          <e type="operand">s</e>
          <e type="operand">s</e>
          <e type="operand">i</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="operand">s</e>
          <e type="operand">i</e>
          <e type="operator" args="2">*</e>
          <e type="operand">0</e>
          <e type="operand">5</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="7">mat</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="15" left="378" top="441" width="74" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">j</e>
          <e type="operand">1</e>
          <e type="operand">5</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="16" left="378" top="477" width="227" height="59" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math>
        <input>
          <e type="operand">j</e>
          <e type="operand">1</e>
          <e type="operand">5</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">v2</e>
          <e type="operand">j</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">1</e>
          <e type="operand">α</e>
          <e type="operator" args="2">*</e>
          <e type="operand">z</e>
          <e type="operand">j</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">α</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">*</e>
          <e type="operand">4</e>
          <e type="operand">r</e>
          <e type="operator" args="2">*</e>
          <e type="operand">i</e>
          <e type="operator" args="2">*</e>
          <e type="function" preserve="true" args="1">exp</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="function" preserve="true" args="3">for</e>
        </input>
      </math>
    </region>
    <region id="17" left="18" top="540" width="108" height="41" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">x</e>
          <e type="operand">y</e>
          <e type="function" args="2">XY</e>
          <e type="operand">x</e>
          <e type="operand">y</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="1">-</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="18" left="378" top="540" width="229" height="59" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math>
        <input>
          <e type="operand">j</e>
          <e type="operand">1</e>
          <e type="operand">5</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">v1</e>
          <e type="operand">j</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">0.5</e>
          <e type="operand">α</e>
          <e type="operator" args="2">*</e>
          <e type="operand">z</e>
          <e type="operand">j</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="bracket">(</e>
          <e type="operand">α</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">*</e>
          <e type="operand">r</e>
          <e type="operand">i</e>
          <e type="operator" args="2">*</e>
          <e type="function" preserve="true" args="1">exp</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="function" preserve="true" args="3">for</e>
        </input>
      </math>
    </region>
    <region id="19" left="378" top="603" width="160" height="55" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">V2</e>
          <e type="operand">v2</e>
          <e type="function" preserve="true" args="1">Re</e>
          <e type="operand">v2</e>
          <e type="function" preserve="true" args="1">Im</e>
          <e type="operand">1</e>
          <e type="operand">2</e>
          <e type="function" preserve="true" args="4">mat</e>
          <e type="operator" args="2">:</e>
          <e type="operand">V1</e>
          <e type="operand">v1</e>
          <e type="function" preserve="true" args="1">Re</e>
          <e type="operand">v1</e>
          <e type="function" preserve="true" args="1">Im</e>
          <e type="operand">1</e>
          <e type="operand">2</e>
          <e type="function" preserve="true" args="4">mat</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
        </input>
      </math>
    </region>
    <region id="20" left="18" top="612" width="189" height="49" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">β</e>
          <e type="function" args="1">rot</e>
          <e type="operand">β</e>
          <e type="function" preserve="true" args="1">cos</e>
          <e type="operand">β</e>
          <e type="function" preserve="true" args="1">sin</e>
          <e type="operand">β</e>
          <e type="function" preserve="true" args="1">sin</e>
          <e type="operator" args="1">-</e>
          <e type="operand">β</e>
          <e type="function" preserve="true" args="1">cos</e>
          <e type="operand">2</e>
          <e type="operand">2</e>
          <e type="function" preserve="true" args="6">mat</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
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    <region id="21" left="378" top="666" width="311" height="26" border="true" color="#000000" bgColor="#ffffe1" fontSize="10">
      <math fractionType="auto" decimalPlaces="6">
        <input>
          <e type="operand">CWD</e>
          <e type="operand" style="string">C:\SmathFile</e>
          <e type="function" preserve="true" args="1">CurrentDirectory</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="22" left="378" top="693" width="258" height="89" color="#000000" bgColor="#ffffff" fontSize="10">
      <math optimize="2">
        <input>
          <e type="operand">V2</e>
          <e type="operand">CWD</e>
          <e type="operand" style="string">Arrow2</e>
          <e type="function" preserve="true" args="3">wfile</e>
          <e type="operand">V1</e>
          <e type="operand">CWD</e>
          <e type="operand" style="string">Arrow1</e>
          <e type="function" preserve="true" args="3">wfile</e>
          <e type="operand">Needle2</e>
          <e type="operand">CWD</e>
          <e type="operand" style="string">Arrow2</e>
          <e type="function" preserve="true" args="2">rfile</e>
          <e type="operator" args="2">:</e>
          <e type="operand">Needle1</e>
          <e type="operand">CWD</e>
          <e type="operand" style="string">Arrow1</e>
          <e type="function" preserve="true" args="2">rfile</e>
          <e type="operator" args="2">:</e>
          <e type="operand">4</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="6">sys</e>
        </input>
      </math>
    </region>
    <region id="23" left="18" top="729" width="173" height="49" color="#000000" bgColor="#ffffff" fontSize="10">
      <math>
        <input>
          <e type="operand">N2</e>
          <e type="operand">Needle2</e>
          <e type="function" args="1">UnestH</e>
          <e type="operator" args="2">:</e>
          <e type="operand">N1</e>
          <e type="operand">Needle1</e>
          <e type="function" args="1">UnestH</e>
          <e type="operator" args="2">:</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
        </input>
      </math>
    </region>
    <region id="24" top="810" color="#000000" bgColor="#ffffff">
      <area terminator="true" />
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  </region>
  <region id="25" left="18" top="846" width="296" height="256" color="#000000" bgColor="#ffffff" fontSize="10" showInputData="False">
    <plot type="2d" render="lines" scale_x="14.5617663224642" scale_y="14.7039132084113" scale_z="70.3119564364795" rotate_x="0" rotate_y="0" rotate_z="0" transpose_x="0" transpose_y="0" transpose_z="0">
      <input>
        <e type="operand">C1</e>
        <e type="operand">C2</e>
        <e type="operand">N2</e>
        <e type="operand">β</e>
        <e type="function" args="1">rot</e>
        <e type="operator" args="2">*</e>
        <e type="operand">N1</e>
        <e type="operand">β</e>
        <e type="function" args="1">rot</e>
        <e type="operator" args="2">*</e>
        <e type="operand">4</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="6">sys</e>
      </input>
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      <yaxes ymin="-1" ymax="1" ytick="0.5" numberformat="General" decimalplaces="3" />
      <y2axes isy2axis="false" y2min="-1" y2max="1" y2tick="0.5" numberformat="General" decimalplaces="3" />
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      <input>
        <e type="operand">C1</e>
        <e type="operand">C2</e>
        <e type="operand">N2</e>
        <e type="operand">β</e>
        <e type="function" args="1">rot</e>
        <e type="operator" args="2">*</e>
        <e type="operand">N1</e>
        <e type="operand">β</e>
        <e type="function" args="1">rot</e>
        <e type="operator" args="2">*</e>
        <e type="operand">XY</e>
        <e type="operand">5</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="7">sys</e>
      </input>
    </xyplot>
  </region>
</regions>