ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Fri, 20 Apr 2012 00:39:03 +0200Problems with LaPlace transform when 'a' is negative in e^-athttps://ask.sagemath.org/question/8908/problems-with-laplace-transform-when-a-is-negative-in-e-at/ var('s t')
f = t^(-1)*exp(-t)-t^(-1)*exp((-3)*t)
f.laplace(t,s)
The above transform works as expected, however, when (-3) is changed to (3), I get the following error:
Traceback (click to the left of this block for traceback)
...
TypeError: ECL says: Maxima asks: Is s-3 positive, negative, or zero?
The Solution that I am expecting is:
log((s - 3)/(s + 1))
I don't know how to specify if s-3 is positive, negative, or zero. Any ideas?
Thanks,
Taylor Killian
tkillianFri, 20 Apr 2012 00:39:03 +0200https://ask.sagemath.org/question/8908/