WSJT-X/boost/libs/math/doc/equations/expint_i_3.mml

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<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mrow>
<mtext>Ei</mtext>
<mfenced>
<mrow>
<mi>z</mi>
</mrow>
</mfenced>
<mo>=</mo>
<mi>log</mi>
<mfenced>
<mrow>
<mfrac>
<mi>z</mi>
<msub>
<mi>z</mi>
<mn>0</mn>
</msub>
</mfrac>
</mrow>
</mfenced>
<mo>+</mo>
<mfenced>
<mrow>
<mi>z</mi>
<mo>&#x2212;</mo>
<msub>
<mi>z</mi>
<mn>0</mn>
</msub>
</mrow>
</mfenced>
<mi>R</mi>
<mfenced>
<mrow>
<mfrac>
<mi>z</mi>
<mn>3</mn>
</mfrac>
<mo>&#x2212;</mo>
<mn>1</mn>
</mrow>
</mfenced>
</mrow>
</math>