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Question: Numerical evaluation of HeunBPrime

Question:Numerical evaluation of HeunBPrime

_Maxim_ 729
November 27 2017
0

Numerical evaluation of HeunBPrime fails if abs(z)>1:

HeunBPrime(.2, .3, .4, .5, 1.5);
Warning, breaking the computation of HeunBPrime after 20000 terms, the series is not converging
                      9.604689581*10^15896

while this gives the correct value:

subs(z = 1.5, convert(series(HeunBPrime(.2, .3, .4, .5, z), z = 0, 40), polynom));
                          15.37195056

 
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