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        <e type="operand">b.G</e>
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        <e type="operand">V</e>
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        <e type="operand">p</e>
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        <e type="operand">Ψ</e>
        <e type="operand">1</e>
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        <p>you can switch from  Ψ  to U</p>
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        <e type="operand">ψsol</e>
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        <e type="function" preserve="true" args="2">col</e>
        <e type="operand">t</e>
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        <e type="function" args="1">ψ''</e>
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        <e type="operand">ψsol</e>
        <e type="operand">3</e>
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        <e type="operand">t</e>
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        <p>RK23</p>
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        <p>Runge - Kutta 2° e 3° ordine</p>
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          <e type="operand">T\0324\</e>
          <e type="operand">t\0324\</e>
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          <e type="operand">1</e>
          <e type="function" preserve="true" args="3">mat</e>
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          <e type="operand">2</e>
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          <e type="operand">N\032E\</e>
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          <e type="operand">ho\0324\</e>
          <e type="operand">h\0324\</e>
          <e type="operator" args="2">:</e>
          <e type="operand">1</e>
          <e type="operand">5</e>
          <e type="function" preserve="true" args="7">mat</e>
          <e type="operand">t\0324\</e>
          <e type="operand">x\0324\</e>
          <e type="operand">k\0324\</e>
          <e type="operand">h\0324\</e>
          <e type="function" args="4">K\0324\</e>
          <e type="operand">h\0324\</e>
          <e type="operand">t\0324\</e>
          <e type="operand">x\0324\</e>
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          <e type="operand">E\032E\</e>
          <e type="operand">ho\0324\</e>
          <e type="function" args="2">UIn</e>
          <e type="operand">x\0324\</e>
          <e type="operand">E\032E\</e>
          <e type="operand">x\0324\</e>
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          <e type="operator" args="2">+</e>
          <e type="function" args="2">D\032E\</e>
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          <e type="function" preserve="true" args="2">try</e>
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          <e type="operand">1</e>
          <e type="function" preserve="true" args="3">line</e>
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          <e type="operand">to\032E\</e>
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          <e type="operator" args="2">≤</e>
          <e type="operand">k\0324\.1</e>
          <e type="operand">t\0324\</e>
          <e type="operand">x\0324\</e>
          <e type="operand">x\0324\</e>
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          <e type="operand">h\0324\</e>
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          <e type="operand">x\0324\</e>
          <e type="operand">k\0324\.1</e>
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          <e type="operand">k\0324\.1</e>
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          <e type="operand">\0324\k.3</e>
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          <e type="operator" args="2">*</e>
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          <e type="operand">x\0324\</e>
          <e type="operand">0.25</e>
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          <e type="operator" args="2">+</e>
          <e type="operand">0.25</e>
          <e type="operand">\0324\k.2</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="operand">\0324\k.2</e>
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          <e type="function" args="4">K\0324\</e>
          <e type="operator" args="2">:</e>
          <e type="operand">t\0324\</e>
          <e type="function" preserve="true" args="1">trace</e>
          <e type="operand">d\0324\</e>
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          <e type="operator" args="2">-</e>
          <e type="operand">\0324\k.2</e>
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          <e type="function" args="1">UOut</e>
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          <e type="operator" args="2">:</e>
          <e type="operand">\0324\q</e>
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          <e type="function" args="1">UOut</e>
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          <e type="operand">2</e>
          <e type="function" preserve="true" args="4">mat</e>
          <e type="function" preserve="true" args="1">max</e>
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          <e type="operand">d\0324\</e>
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          <e type="operand">t\0324\</e>
          <e type="operand">h\0324\</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="operand">T\0324\</e>
          <e type="operand">n\0324\</e>
          <e type="operand">n\0324\</e>
          <e type="operand">1</e>
          <e type="operator" args="2">+</e>
          <e type="operator" args="2">:</e>
          <e type="function" preserve="true" args="2">el</e>
          <e type="operand">t\0324\</e>
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          <e type="operand">1</e>
          <e type="operand">2</e>
          <e type="function" preserve="true" args="4">mat</e>
          <e type="operand">x\0324\</e>
          <e type="operand">x\0324\</e>
          <e type="operand">k\0324\.1</e>
          <e type="operand">4</e>
          <e type="operand">\0324\k.3</e>
          <e type="operator" args="2">*</e>
          <e type="operator" args="2">+</e>
          <e type="operand">\0324\k.2</e>
          <e type="operator" args="2">+</e>
          <e type="operand">6</e>
          <e type="operator" args="2">/</e>
          <e type="operator" args="2">+</e>
          <e type="function" preserve="true" args="1">eval</e>
          <e type="operator" args="2">:</e>
          <e type="operand">X\0324\</e>
          <e type="operand">n\0324\</e>
          <e type="operand">k\0324\</e>
          <e type="function" preserve="true" args="3">el</e>
          <e type="operand">x\0324\</e>
          <e type="operand">k\0324\</e>
          <e type="function" preserve="true" args="2">el</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">2</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="4">line</e>
          <e type="operand" style="string">
            </e>
          <e type="function" preserve="true" args="3">if</e>
          <e type="operand">d\0324\</e>
          <e type="operand">0</e>
          <e type="operator" args="2">≠</e>
          <e type="operand">h\0324\</e>
          <e type="operand">ho\0324\</e>
          <e type="operand">0.9</e>
          <e type="operand">h\0324\</e>
          <e type="operator" args="2">*</e>
          <e type="operand">\0324\q</e>
          <e type="operand">d\0324\</e>
          <e type="operator" args="2">/</e>
          <e type="operand">3</e>
          <e type="function" preserve="true" args="2">nthroot</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="function" preserve="true" args="1">min</e>
          <e type="function" preserve="true" args="1">eval</e>
          <e type="operator" args="2">:</e>
          <e type="operand" style="string">
            </e>
          <e type="function" preserve="true" args="3">if</e>
          <e type="operand">8</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="10">line</e>
          <e type="function" preserve="true" args="2">while</e>
          <e type="operand">T\0324\</e>
          <e type="operand">X\0324\</e>
          <e type="function" preserve="true" args="2">augment</e>
          <e type="function" preserve="true" args="1">eval</e>
          <e type="operand">6</e>
          <e type="operand">1</e>
          <e type="function" preserve="true" args="8">line</e>
          <e type="operator" args="2">:</e>
        </input>
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    <region id="22" top="1881" color="#000000" bgColor="#ffffff">
      <area terminator="true" />
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