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<html xmlns='http://www.w3.org/1999/xhtml'>
<head><title>mbessel17</title>
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</head>
<body>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mrow>
    <msub>
      <mi>I</mi>
      <mi>v</mi>
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    <mo>=</mo>
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      <mo>&#x2211;</mo>
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        <mo>=</mo>
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      <mn>1</mn>
      <mrow>
        <mi>&#x0393;</mi>
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            <mi>k</mi>
            <mo>+</mo>
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