BesselInu

BesselInu(x, nu)

Modified first kind Bessel function of order nu.

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

Parameters:
xfloat
nufloat \in \Rset^*_+
Returns:
resultfloat