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        <p fontName="Arial">     Levenberg Marquardt's second algorithm  . . . Carlos 20200122     </p>
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          <e type="function" preserve="true" args="3">for</e>
          <e type="operand">jjh0</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="operator" args="2">:</e>
          <e type="operand">m</e>
          <e type="operand">x</e>
          <e type="function" preserve="true" args="1">rows</e>
          <e type="operator" args="2">:</e>
          <e type="operand">n</e>
          <e type="operand">β</e>
          <e type="function" preserve="true" args="1">rows</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>
          <e type="operand">A</e>
          <e type="operand">n</e>
          <e type="operand">n</e>
          <e type="function" preserve="true" args="2">Zeros</e>
          <e type="operator" args="2">:</e>
          <e type="operand">g</e>
          <e type="operand">n</e>
          <e type="function" preserve="true" args="1">Zeros</e>
          <e type="operator" args="2">:</e>
          <e type="operand">J</e>
          <e type="operand">m</e>
          <e type="operand">n</e>
          <e type="function" preserve="true" args="2">Zeros</e>
          <e type="operator" args="2">:</e>
          <e type="operand">1</e>
          <e type="operand">3</e>
          <e type="function" preserve="true" args="5">mat</e>
          <e type="operand">Fn</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="1">Zeros</e>
          <e type="operator" args="2">:</e>
          <e type="operand">dL</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="1">Zeros</e>
          <e type="operator" args="2">:</e>
          <e type="operand">dF</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="1">Zeros</e>
          <e type="operator" args="2">:</e>
          <e type="operand">F</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="1">Zeros</e>
          <e type="operator" args="2">:</e>
          <e type="operand">1</e>
          <e type="operand">4</e>
          <e type="function" preserve="true" args="6">mat</e>
          <e type="operand">f</e>
          <e type="operand">β</e>
          <e type="function" args="1">fx</e>
          <e type="operator" args="2">:</e>
          <e type="operand">J</e>
          <e type="operand">β</e>
          <e type="operand">m</e>
          <e type="operand">n</e>
          <e type="operand">h</e>
          <e type="function" args="4">derfh</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>
          <e type="operand">A</e>
          <e type="operand">J</e>
          <e type="function" preserve="true" args="1">transpose</e>
          <e type="operand">J</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">g</e>
          <e type="operand">J</e>
          <e type="function" preserve="true" args="1">transpose</e>
          <e type="operand">f</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">ng</e>
          <e type="operand">g</e>
          <e type="function" preserve="true" args="1">normi</e>
          <e type="operator" args="2">:</e>
          <e type="operand">1</e>
          <e type="operand">3</e>
          <e type="function" preserve="true" args="5">mat</e>
          <e type="operand">F</e>
          <e type="operand">f</e>
          <e type="function" preserve="true" args="1">transpose</e>
          <e type="operand">f</e>
          <e type="operator" args="2">*</e>
          <e type="operand">2</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="2">:</e>
          <e type="operand">mu</e>
          <e type="operand">eta1</e>
          <e type="operand">A</e>
          <e type="function" preserve="true" args="1">Diag</e>
          <e type="function" preserve="true" args="1">max</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">nu</e>
          <e type="operand">2</e>
          <e type="operator" args="2">:</e>
          <e type="operand">1</e>
          <e type="operand">3</e>
          <e type="function" preserve="true" args="5">mat</e>
          <e type="operand">stop</e>
          <e type="operator" args="1">¬</e>
          <e type="operand">cont</e>
          <e type="operand">cont</e>
          <e type="operand">1</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">ng</e>
          <e type="operand">eta2</e>
          <e type="operator" args="2">≤</e>
          <e type="operand">stop</e>
          <e type="operand">1</e>
          <e type="operator" args="2">:</e>
          <e type="operand">p</e>
          <e type="operand">A</e>
          <e type="operand">mu</e>
          <e type="operand">n</e>
          <e type="function" preserve="true" args="1">identity</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="function" preserve="true" args="1">invert</e>
          <e type="operand">g</e>
          <e type="operator" args="1">-</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">break</e>
          <e type="function" preserve="true" args="2">try</e>
          <e type="operand">np</e>
          <e type="operand">β</e>
          <e type="function" preserve="true" args="1">normi</e>
          <e type="operator" args="2">:</e>
          <e type="operand">nx</e>
          <e type="operand">eta2</e>
          <e type="operand">β</e>
          <e type="function" preserve="true" args="1">normi</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">np</e>
          <e type="operand">eta2</e>
          <e type="operand">nx</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">≤</e>
          <e type="operand">stop</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">1</e>
          <e type="function" preserve="true" args="2">range</e>
          <e type="operand">stop</e>
          <e type="operator" args="1">¬</e>
          <e type="operand">xnew</e>
          <e type="operand">β</e>
          <e type="operand">p</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">fn</e>
          <e type="operand">xnew</e>
          <e type="function" args="1">fx</e>
          <e type="operator" args="2">:</e>
          <e type="operand">Jn</e>
          <e type="operand">β</e>
          <e type="operand">m</e>
          <e type="operand">n</e>
          <e type="operand">h</e>
          <e type="function" args="4">derfh</e>
          <e type="operator" args="2">:</e>
          <e type="operand">brake</e>
          <e type="operand">1</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="3">line</e>
          <e type="function" preserve="true" args="2">try</e>
          <e type="operand">Fn</e>
          <e type="operand">fn</e>
          <e type="function" preserve="true" args="1">transpose</e>
          <e type="operand">fn</e>
          <e type="operator" args="2">*</e>
          <e type="operand">2</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="2">:</e>
          <e type="operand">dL</e>
          <e type="operand">p</e>
          <e type="function" preserve="true" args="1">transpose</e>
          <e type="operand">mu</e>
          <e type="operand">p</e>
          <e type="operator" args="2">*</e>
          <e type="operand">g</e>
          <e type="operator" args="2">-</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">*</e>
          <e type="operand">2</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="2">:</e>
          <e type="operand">dF</e>
          <e type="operand">F</e>
          <e type="operand">Fn</e>
          <e type="operator" args="2">-</e>
          <e type="operator" args="2">:</e>
          <e type="operand">dL</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">0</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operand">dF</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">0</e>
          <e type="operator" args="2">&gt;</e>
          <e type="bracket">(</e>
          <e type="operator" args="2">&amp;</e>
          <e type="operand">β</e>
          <e type="operand">xnew</e>
          <e type="operator" args="2">:</e>
          <e type="operand">F</e>
          <e type="operand">Fn</e>
          <e type="operator" args="2">:</e>
          <e type="operand">J</e>
          <e type="operand">Jn</e>
          <e type="operator" args="2">:</e>
          <e type="operand">f</e>
          <e type="operand">fn</e>
          <e type="operator" args="2">:</e>
          <e type="operand">A</e>
          <e type="operand">J</e>
          <e type="function" preserve="true" args="1">transpose</e>
          <e type="operand">J</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">g</e>
          <e type="operand">J</e>
          <e type="function" preserve="true" args="1">transpose</e>
          <e type="operand">f</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">ng</e>
          <e type="operand">g</e>
          <e type="function" preserve="true" args="1">normi</e>
          <e type="operator" args="2">:</e>
          <e type="operand">mu</e>
          <e type="operand">mu</e>
          <e type="operand">1</e>
          <e type="operand">3</e>
          <e type="operator" args="2">/</e>
          <e type="operand">1</e>
          <e type="operand">2</e>
          <e type="operand">dF</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">dL</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="2">*</e>
          <e type="operand">1</e>
          <e type="operator" args="2">-</e>
          <e type="bracket">(</e>
          <e type="operand">3</e>
          <e type="operator" args="2">^</e>
          <e type="operator" args="2">-</e>
          <e type="function" preserve="true" args="2">Max</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">nu</e>
          <e type="operand">2</e>
          <e type="operator" args="2">:</e>
          <e type="operand">9</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="11">line</e>
          <e type="operand">mu</e>
          <e type="operand">mu</e>
          <e type="operand">nu</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">:</e>
          <e type="operand">nu</e>
          <e type="operand">2</e>
          <e type="operand">nu</e>
          <e type="operator" args="2">*</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>
          <e type="function" preserve="true" args="3">if</e>
          <e type="operand">7</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="9">line</e>
          <e type="operand" style="string">
            </e>
          <e type="operand">1</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="3">line</e>
          <e type="function" preserve="true" args="3">if</e>
          <e type="function" preserve="true" args="3">for</e>
          <e type="function" preserve="true" args="3">if</e>
          <e type="operand">4</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="6">line</e>
          <e type="function" preserve="true" args="3">if</e>
          <e type="operand">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="function" preserve="true" args="2">while</e>
          <e type="operand">βs</e>
          <e type="operand">β</e>
          <e type="operator" args="2">:</e>
          <e type="operand">12</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="14">line</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="12" left="639" top="1107" width="96" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
      <math evaluate="false" decimalPlaces="15" exponentialThreshold="12">
        <input>
          <e type="operand">m</e>
          <e type="function" args="1">Clear</e>
          <e type="operand">1</e>
          <e type="operator" args="2">:</e>
        </input>
      </math>
    </region>
    <region id="13" top="2466" color="#000000" bgColor="#ffffff">
      <area terminator="true" />
    </region>
  </region>
  <region id="14" left="27" top="2493" width="61" height="207" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="15">
      <input>
        <e type="operand">x</e>
        <e type="operand">1</e>
        <e type="operand">2</e>
        <e type="operand">3</e>
        <e type="operand">4</e>
        <e type="operand">5</e>
        <e type="operand">6</e>
        <e type="operand">7</e>
        <e type="operand">8</e>
        <e type="operand">9</e>
        <e type="operand">10</e>
        <e type="operand">11</e>
        <e type="operand">11</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="13">mat</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="15" left="117" top="2493" width="94" height="207" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="15">
      <input>
        <e type="operand">y</e>
        <e type="operand">0.4897</e>
        <e type="operand">1.3079</e>
        <e type="operand">2.84</e>
        <e type="operand">3.0364</e>
        <e type="operand">1.7709</e>
        <e type="operand">0.5491</e>
        <e type="operand">0.4606</e>
        <e type="operand">0.3345</e>
        <e type="operand">0.2073</e>
        <e type="operand">0.0012</e>
        <e type="operand">0.0024</e>
        <e type="operand">11</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="13">mat</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="16" left="243" top="2493" width="352" height="78" color="#000000" bgColor="#ebebeb" fontSize="10">
    <math fractionType="fraction">
      <input>
        <e type="operand">x</e>
        <e type="operand">β</e>
        <e type="function" args="2">ft</e>
        <e type="operand">β</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">β</e>
        <e type="operand">3</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">x</e>
        <e type="operand">β</e>
        <e type="operand">4</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">/</e>
        <e type="bracket">(</e>
        <e type="operand">β</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">*</e>
        <e type="operand">β</e>
        <e type="operand">3</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">x</e>
        <e type="operand">β</e>
        <e type="operand">4</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">-</e>
        <e type="operator" args="2">/</e>
        <e type="bracket">(</e>
        <e type="operand">β</e>
        <e type="operand">2</e>
        <e type="function" preserve="true" args="2">el</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="1">-</e>
        <e type="function" preserve="true" args="1">exp</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="17" left="252" top="2565" width="145" height="26" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="15" exponentialThreshold="12">
      <input>
        <e type="operand">UV</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>
      </input>
    </math>
  </region>
  <region id="18" left="252" top="2583" width="279" height="49" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">XY</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">Data</e>
        <e type="operand">XY</e>
        <e type="operand" style="string">.</e>
        <e type="operand">10</e>
        <e type="operand" style="string">black</e>
        <e type="function" args="4">plot</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="19" left="252" top="2628" width="233" height="50" color="#000000" bgColor="#ffffff" fontSize="10">
    <math exponentialThreshold="12">
      <description active="true" position="Right" lang="eng">
        <p>1. selct the support points2. collect for al_nleqsolve</p>
      </description>
      <input>
        <e type="operand">list</e>
        <e type="operand">2</e>
        <e type="operand">3</e>
        <e type="operand">4</e>
        <e type="operand">5</e>
        <e type="operand">7</e>
        <e type="operand">10</e>
        <e type="operand">1</e>
        <e type="operand">6</e>
        <e type="function" preserve="true" args="8">mat</e>
        <e type="operator" args="2">:</e>
        <e type="operand">new</e>
        <e type="operand">UV</e>
        <e type="operand">list</e>
        <e type="function" args="2">ListCollect</e>
        <e type="operator" args="2">:</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" preserve="true" args="4">sys</e>
      </input>
    </math>
  </region>
  <region id="20" left="252" top="2673" width="304" height="49" color="#000000" bgColor="#ffffff" fontSize="10">
    <math exponentialThreshold="12">
      <input>
        <e type="operand">raw</e>
        <e type="operand">UV</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">black</e>
        <e type="function" args="4">plot</e>
        <e type="operator" args="2">:</e>
        <e type="operand">support</e>
        <e type="operand">new</e>
        <e type="operand" style="string">.</e>
        <e type="operand">14</e>
        <e type="operand" style="string">blue</e>
        <e type="function" args="4">plot</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="21" left="144" top="2718" width="145" height="117" color="#000000" bgColor="#ffffff" fontSize="10">
    <math decimalPlaces="15" exponentialThreshold="12">
      <input>
        <e type="operand">new</e>
      </input>
      <result action="numeric">
        <e type="operand">2</e>
        <e type="operand">1.3079</e>
        <e type="operand">3</e>
        <e type="operand">2.84</e>
        <e type="operand">4</e>
        <e type="operand">3.0364</e>
        <e type="operand">5</e>
        <e type="operand">1.7709</e>
        <e type="operand">7</e>
        <e type="operand">0.4606</e>
        <e type="operand">10</e>
        <e type="operand">0.0012</e>
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        <e type="function" preserve="true" args="14">mat</e>
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      <description active="true" position="Right" lang="eng">
        <p>ConjugateGradient =&gt;</p>
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      <description active="true" position="Right" lang="eng">
        <p>Tolerance</p>
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      <description active="true" position="Right" lang="eng">
        <p>SS 6179 OK 6 data</p>
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        <e type="operand">8.5418</e>
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  <region id="30" left="351" top="2925" width="170" height="30" color="#ffff00" bgColor="#010101" fontSize="12">
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      <result action="numeric">
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      <description active="true" position="Right" lang="eng">
        <p>recover @ 'tol'</p>
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        <e type="function" preserve="true" args="2">el</e>
        <e type="operand">β</e>
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        <e type="function" preserve="true" args="2">el</e>
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  <region id="34" left="27" top="3051" width="113" height="81" color="#000000" bgColor="#ffe1e1" fontSize="10">
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      <description active="true" position="Right" lang="eng">
        <p>Fréchet &amp; many more are reflexive ...</p>
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        <e type="function" preserve="true" args="6">mat</e>
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