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      <header alignment="Center" color="#a9a9a9">&amp;[DATE] &amp;[TIME] - &amp;[FILENAME]</header>
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    <text lang="eng">
      <p bold="true">Explore an hypersurface</p>
    </text>
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      <description active="true" position="Right" lang="eng">
        <p>The governing hypersurface parameter</p>
      </description>
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        <e type="operand">c</e>
        <e type="operand">1</e>
        <e type="operator" args="2">:</e>
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        <e type="operand">c</e>
        <e type="operator" args="2">*</e>
        <e type="operand">y</e>
        <e type="operator" args="2">*</e>
        <e type="operand">3</e>
        <e type="operand">x</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">*</e>
        <e type="operand">y</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">*</e>
        <e type="operand">y</e>
        <e type="operand">4</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">-</e>
        <e type="operand">c</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">x</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">y</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">-</e>
        <e type="operand">4</e>
        <e type="operand">c</e>
        <e type="operand">4</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">+</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operand">x</e>
        <e type="function" args="1">cos</e>
        <e type="operator" args="2">*</e>
        <e type="operand">y</e>
        <e type="function" args="1">sinh</e>
        <e type="operator" args="2">*</e>
        <e type="operand">2</e>
        <e type="operand">c</e>
        <e type="operator" args="2">*</e>
        <e type="operand">y</e>
        <e type="operator" args="2">*</e>
        <e type="operand">x</e>
        <e type="operand">4</e>
        <e type="operator" args="2">^</e>
        <e type="operand">3</e>
        <e type="operand">y</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">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">-</e>
        <e type="operand">c</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">x</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operand">y</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">+</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">-</e>
        <e type="operand">4</e>
        <e type="operand">c</e>
        <e type="operand">4</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">*</e>
        <e type="operator" args="2">-</e>
        <e type="bracket">(</e>
        <e type="operator" args="2">*</e>
        <e type="operand">x</e>
        <e type="function" args="1">sin</e>
        <e type="operator" args="2">*</e>
        <e type="operand">y</e>
        <e type="function" args="1">cosh</e>
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        <e type="operand">x</e>
        <e type="operand">y</e>
        <e type="operator" args="2">*</e>
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        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
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        <e type="operand">2</e>
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        <e type="operator" args="2">^</e>
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        <e type="operand">c</e>
        <e type="operand">2</e>
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        <e type="bracket">(</e>
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        <e type="operator" args="2">*</e>
        <e type="function" args="1">sin</e>
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        <e type="operand">1</e>
        <e type="function" args="5">mat</e>
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        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">sys</e>
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        <e type="operand">f</e>
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        <e type="operand">0</e>
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        <e type="operand">H</e>
        <e type="operand">L</e>
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        <e type="operand">N</e>
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        <e type="operand">i</e>
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        <e type="operand">L</e>
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        <e type="operand">i</e>
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        <e type="function" args="3">for</e>
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      <p>Implicit Plot solving for X or for Y.</p>
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        <e type="function" args="4">IPlotSol</e>
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        <e type="function" args="2">range</e>
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        <e type="operand">u</e>
        <e type="function" args="1">Clear</e>
        <e type="operand">1</e>
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        <e type="function" args="5">mat</e>
        <e type="operand">X</e>
        <e type="function" args="1">length</e>
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        <e type="operator" args="2">≡</e>
        <e type="operand">Y</e>
        <e type="operand">Y</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">Y</e>
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        <e type="operand">X</e>
        <e type="operand">k</e>
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        <e type="operand">u</e>
        <e type="operand">Y</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="function" args="2">f</e>
        <e type="operand">λ</e>
        <e type="operator" args="2">-</e>
        <e type="operand">u</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" args="2">el</e>
        <e type="function" args="3">roots</e>
        <e type="function" args="1">eval</e>
        <e type="operand">v</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">X</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" args="2">el</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" args="4">line</e>
        <e type="function" args="2">try</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="operand">X</e>
        <e type="operand">X</e>
        <e type="operand">1</e>
        <e type="function" args="2">el</e>
        <e type="operand">X</e>
        <e type="function" args="2">stack</e>
        <e type="function" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Y</e>
        <e type="operand">k</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="operand">u</e>
        <e type="function" args="2">f</e>
        <e type="operand">λ</e>
        <e type="operator" args="2">-</e>
        <e type="operand">u</e>
        <e type="operand">Y</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" args="2">el</e>
        <e type="function" args="3">roots</e>
        <e type="function" args="1">eval</e>
        <e type="operand">v</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">Y</e>
        <e type="operand">k</e>
        <e type="operand">1</e>
        <e type="operator" args="2">-</e>
        <e type="function" args="2">el</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
        <e type="function" args="4">line</e>
        <e type="function" args="2">try</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">S</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">r</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">c</e>
        <e type="operand">1</e>
        <e type="operand">2</e>
        <e type="function" args="2">range</e>
        <e type="operator" args="2">:</e>
        <e type="operand">M</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="function" args="2">augment</e>
        <e type="function" args="1">eval</e>
        <e type="operator" args="2">:</e>
        <e type="operand">1</e>
        <e type="operand">4</e>
        <e type="function" args="6">mat</e>
        <e type="operand">k</e>
        <e type="operand">2</e>
        <e type="operand">n</e>
        <e type="function" args="2">range</e>
        <e type="operand">v</e>
        <e type="operand">k</e>
        <e type="function" args="2">el</e>
        <e type="operand">0</e>
        <e type="operator" args="2">≠</e>
        <e type="operand">r</e>
        <e type="operand">r</e>
        <e type="operand">1</e>
        <e type="operator" args="2">+</e>
        <e type="operator" args="2">:</e>
        <e type="operand">S</e>
        <e type="operand">r</e>
        <e type="operand">c</e>
        <e type="function" args="3">el</e>
        <e type="operand">M</e>
        <e type="operand">k</e>
        <e type="operand">c</e>
        <e type="function" args="3">el</e>
        <e type="operator" args="2">:</e>
        <e type="operand">1</e>
        <e type="operand">2</e>
        <e type="function" args="4">mat</e>
        <e type="operand">0</e>
        <e type="function" args="3">if</e>
        <e type="function" args="3">for</e>
        <e type="operand">S</e>
        <e type="function" args="1">eval</e>
        <e type="operand">6</e>
        <e type="operand">1</e>
        <e type="function" args="8">line</e>
        <e type="operator" args="2">:</e>
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  </region>
  <region id="8" left="783" top="693" width="209" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <text lang="spa">
      <p>duplicate the first row.</p>
    </text>
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  <region id="9" left="783" top="765" width="291" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <text lang="spa">
      <p>use the previous root as guess ...</p>
    </text>
  </region>
  <region id="10" left="837" top="801" width="144" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <text lang="spa">
      <p>remember errors.</p>
    </text>
  </region>
  <region id="11" left="783" top="828" width="272" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <text lang="spa">
      <p>... or as value, if can't solve.</p>
    </text>
  </region>
  <region id="12" left="792" top="882" width="225" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <text lang="spa">
      <p>discard values with errors</p>
    </text>
  </region>
  <region id="13" left="54" top="1026" width="119" height="24" color="#000000" bgColor="#ffffff" fontSize="10">
    <text lang="eng">
      <p>Default level</p>
    </text>
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        <e type="operand">2</e>
        <e type="function" args="1">f</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="function" args="3">IPlotSol</e>
        <e type="operand">x#</e>
        <e type="operand">y#</e>
        <e type="function" args="2">f</e>
        <e type="operand">X</e>
        <e type="operand">Y</e>
        <e type="operand">0</e>
        <e type="function" args="4">IPlotSol</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">line</e>
        <e type="operator" args="2">:</e>
      </input>
    </math>
  </region>
  <region id="15" left="36" top="1098" width="332" height="29" color="#000000" bgColor="#ffffff" fontSize="10">
    <math>
      <input>
        <e type="operand">S1</e>
        <e type="operand">x</e>
        <e type="operand">y</e>
        <e type="function" args="2">f</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">mat</e>
        <e type="operand">5</e>
        <e type="operator" args="1">-</e>
        <e type="operand">5</e>
        <e type="operand">50</e>
        <e type="function" args="3">xd</e>
        <e type="function" args="3">IPlotSol</e>
        <e type="operator" args="2">:</e>
      </input>
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        <e type="operand">4</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">mat</e>
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        <e type="operand">1</e>
        <e type="operator" args="1">-</e>
        <e type="operand">50</e>
        <e type="function" args="3">xd</e>
        <e type="function" args="3">IPlotSol</e>
        <e type="operator" args="2">:</e>
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        <e type="operand">S1</e>
        <e type="operand" style="string">o</e>
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        <e type="operand" style="string">blue</e>
        <e type="function" args="4">augment</e>
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        <e type="operand">1</e>
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        <e type="operand">S2</e>
        <e type="operand">2</e>
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        <e type="operand">x</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
        <e type="operator" args="2">*</e>
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        <e type="operand">y</e>
        <e type="operand">3</e>
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        <e type="operator" args="2">-</e>
        <e type="operand">12</e>
        <e type="operand">x</e>
        <e type="function" args="1">cos</e>
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        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">x</e>
        <e type="operand">y</e>
        <e type="function" args="2">f.2</e>
        <e type="operand">9</e>
        <e type="operand">x</e>
        <e type="operand">2</e>
        <e type="operator" args="2">^</e>
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        <e type="operand">14</e>
        <e type="operand">x</e>
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        <e type="function" args="1">cos</e>
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        <e type="operator" args="2">-</e>
        <e type="operator" args="2">:</e>
        <e type="operand">2</e>
        <e type="operand">1</e>
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        <e type="operator" args="1">-</e>
        <e type="operand">2</e>
        <e type="operand">150</e>
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        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">mat</e>
        <e type="function" args="3">IPlotSol</e>
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        <e type="operand">S2.a</e>
        <e type="operand">x</e>
        <e type="operand">y</e>
        <e type="function" args="2">f.2</e>
        <e type="operand">4</e>
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        <e type="operand">1</e>
        <e type="operand">1</e>
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        <e type="operator" args="1">-</e>
        <e type="operand">2</e>
        <e type="operand">75</e>
        <e type="function" args="3">xd</e>
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        <e type="operator" args="2">:</e>
        <e type="operand">S2.b</e>
        <e type="operand">x</e>
        <e type="operand">y</e>
        <e type="function" args="2">f.2</e>
        <e type="operand">4</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">mat</e>
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        <e type="operator" args="1">-</e>
        <e type="operand">75</e>
        <e type="function" args="3">xd</e>
        <e type="function" args="3">IPlotSol</e>
        <e type="operator" args="2">:</e>
        <e type="operand">S2</e>
        <e type="operand">S2.a</e>
        <e type="operand">S2.b</e>
        <e type="operand">S2.a</e>
        <e type="operand">1</e>
        <e type="function" args="2">row</e>
        <e type="function" args="3">stack</e>
        <e type="operator" args="2">:</e>
        <e type="operand">4</e>
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        <e type="function" args="6">sys</e>
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        <e type="operand">S2</e>
        <e type="operand">S1</e>
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        <e type="operand">5</e>
        <e type="operand" style="string">blue</e>
        <e type="function" args="4">augment</e>
        <e type="operand">S2</e>
        <e type="operand" style="string">o</e>
        <e type="operand">5</e>
        <e type="operand" style="string">red</e>
        <e type="function" args="4">augment</e>
        <e type="operand">4</e>
        <e type="operand">1</e>
        <e type="function" args="6">sys</e>
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    <text lang="eng">
      <p>Contour levels</p>
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        <e type="operand">M</e>
        <e type="operand">0</e>
        <e type="operator" args="2">:</e>
        <e type="operand">k</e>
        <e type="operand">0</e>
        <e type="operand">5</e>
        <e type="function" args="2">range</e>
        <e type="operand">M</e>
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        <e type="operand">1</e>
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        <e type="function" args="2">el</e>
        <e type="operand">x</e>
        <e type="operand">y</e>
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        <e type="operator" args="1">-</e>
        <e type="operand">2</e>
        <e type="operand">100</e>
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        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="operand">1</e>
        <e type="function" args="3">mat</e>
        <e type="operand">3</e>
        <e type="operand">k</e>
        <e type="operator" args="2">*</e>
        <e type="function" args="4">IPlotSol</e>
        <e type="operator" args="2">:</e>
        <e type="function" args="3">for</e>
        <e type="operand">M</e>
        <e type="function" args="1">mat2sys.1</e>
        <e type="operand">3</e>
        <e type="operand">1</e>
        <e type="function" args="5">line</e>
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    </plot>
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