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1d
comment Expanding PolyGamma function error
I've started to push this further and the solution by @Guesswhoitis. does not work for very large arguments (the kernel just quits), e.g. try Block[{$RecursionLimit = Infinity}, FunctionExpand[PolyGamma[0, a]]] for a=4501/2 and a=4601/2.
1d
comment Expanding PolyGamma function error
Sorry, I haven't mentioned that I'm interested in exact values and a way to overcome this bug not in approximate (numerical) results.
1d
comment Expanding PolyGamma function error
This seems to work. Can you please give (if possible) a more detailed answer below and possibly a mechanism 'behind the scenes'? Alternative solution to this bug is to apply a recurrence to PolyGamma[] or HarmonicNumber[] by hand.
1d
comment Expanding PolyGamma function error
Gamma[] is just evaluated, for HarmonicNumber[] I do get the same as for PolyGamma[].
1d
revised Legendre expansion of functions
Syntax edits.
1d
reviewed Reviewed Legendre expansion of functions
1d
suggested approved edit on Legendre expansion of functions
1d
asked Expanding PolyGamma function error
Aug
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awarded  Notable Question
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Oct
10
answered Export data from NDSolve when they meet a certain condition
Sep
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awarded  Explainer
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comment Spherical harmonic derivative
This looks rather as a bug...
Mar
9
accepted Setting bash environment within external call
Mar
9
answered Setting bash environment within external call
Mar
9
comment Setting bash environment within external call
As I have stated in the question ReadList["!source $HOME/.bashrc; echo $PATH", String] does not take any effect for me.
Mar
9
asked Spherical harmonic derivative
Mar
9
answered How to get a number from Solve