Confluent hypergeometric function (mpmath, WMA)
HypergeometricU[a, b, z]HypergeometricU[3, 2, 1]
HypergeometricU[1,4,8]
unless a numerical evaluation is explicitly requested:
HypergeometricU[3, 2, 1] // N
HypergeometricU[3, 2, 1.]
Plot U[3, 2, x] from 0 to 10 in steps of 0.5:
Plot[HypergeometricU[3, 2, x], {x, 0.5, 10}]
We handle this special case:
HypergeometricU[0, b, z]