Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

FWIW :

sage: sum(x^j/factorial(j),j,0,oo)
e^x
sage: sum(x^j/factorial(j),j,0,oo).subs(x==0)
1
sage: sum(x^j/factorial(j),j,0,oo).limit(x=0)
1

but :

sage: sum(0^j/factorial(j),j,0,oo)
0

is indeed a bug, bound to Trac#22027, as you pointed out, which I have updated.