Maxima Function
bfpsi (n, z, fpprec)
bfpsi0(z,fpprec)
bfpsi
is the polygamma function of real argument z and integer order n.
bfpsi0
is the digamma function.
bfpsi0 (z, fpprec)
is equivalent to bfpsi (0, z, fpprec)
.
These functions return bigfloat values. fpprec is the bigfloat precision of the return value.
load ("bffac")
loads these functions.