Advanced Search

Question: Strange bug in fsolve with Digits

Question:Strange bug in fsolve with Digits

vv 13400 Maple
February 06 2017
1

It is well known that fsolve usually increases (internally) Digits in order to obtain the desired accuracy.

But in the following example, it seems that fsolve highly exaggerates :-)   

restart;
N:=40:
Digits:=100:
F:=expand(mul(x-k,k=1..N)):
f:=evalf(F):
S:=[fsolve(f,complex)];

Error, (in fsolve) Digits cannot exceed 38654705646


Note that the bug does not appear if e.g. F:=expand(mul(x-k-I, k=1..N)):

 

 
Please Wait...