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.Sun, 20 Dec 2015 16:56:36 +0100Setting the conditions at t=0 for laplace transform with sage (instead of maxima)https://ask.sagemath.org/question/31713/setting-the-conditions-at-t0-for-laplace-transform-with-sage-instead-of-maxima/Hallo,
I am trying to calculate the laplace transform for the following differential equation with sage instead of maxima.
"m*'diff(x_f(t)+x_d(t),t,2)+d*'diff(x_d(t),t,1)+c*x_d(t)+Fext(t)=0"
But I do not find how to set the values in sage at t=0 for the functions x_d(t) and x_f(t). Before I did set it with maxima with
```
maxima.eval("atvalue(x_d(t), t=0, 0)$ atvalue('diff(x_d(t),t), t=0, 0)$");
maxima.eval("atvalue(x_f(t), t=0, 0)$ atvalue('diff(x_f(t),t), t=0, 0)$");
```
Basically, I am trying to use the sage laplace transfrom function instead of the sage-maxima function resulting in a nicer notebook without all the maxima.eval add maxima.-commands. I know that sage is using maxima for the transformation in the background.
BR Howil
howilSun, 20 Dec 2015 16:56:36 +0100https://ask.sagemath.org/question/31713/