bug in series

[swd...@hotmail.ca]

This is literally my first program using sympy, based on an example from my calculus class:

from sympy import *

def main():

    x=symbols("x")

    f=exp(x**3)*cos(x**6)

    print(series(f,x,0,14))

    print(series(f,x,0,19))

if __name__ == "__main__":

    main()

The output:

1 + x**3 + x**6/2 + x**9/6 + x**12/24 + O(x**14)

1 + x**3 + x**6/2 + x**9/6 - 11*x**12/24 - 59*x**15/120 - 179*x**18/720 + O(x**19)

As you can see at least one of the answers is wrong.

Should I bother using sympy a second time?

[Ondřej Čertík]

Hi Swdrury,

Thanks for reporting it. I created an issue for it here:

https://github.com/sympy/sympy/issues/10503

The series is pretty well tested, so I am surprised that there is a
bug like this. This needs to be fixed.

> Should I bother using sympy a second time?

We'll update the issue once this is fixed. If you find any other
issues, please let us know.

Thanks,
Ondrej

[Denis Akhiyarov]

omg has the patch