Ocs package: Difference between revisions

177 bytes added ,  22 September 2015
Line 560: Line 560:
<math>
<math>
   \dfrac{\partial I}{\partial V} = \dfrac{1}{H}  
   \dfrac{\partial I}{\partial V} = \dfrac{1}{H}  
</math>
<math>
H'(x) = \left\{
        \begin{array}{l}
        0 \; x \le 0\\
        - (R - r) \; 0 < x < 1\\
        0 \; x > 1
        \end{array}       
        \right.
</math>
</math>
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