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: <math>\operatorname{Sinhc}(z)=\frac {\sinh(z) }{z}</math>
It is a solution of the following differential equation:
<math>w \left( z \right) z-2\,{\frac {d}{dz}}w \left( z \right) -z{\frac {d^
{2}}{d{z}^{2}}}w \left( z \right) =0</math>
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