SpecFunc_BesselI0

SpecFunc_BesselI0(x)

Modified first kind Bessel function of order 0.

\forall x \in \Rset, \quad
\mathrm{I}_0(x) = \sum_{m=0}^\infty\frac{1}{m!^2}\left(\frac{x}{2}\right)^{2m}

Parameters:x : float
Returns:result : float