2017-02-23 23:49:35 -0600 received badge ● Notable Question (source) 2017-02-23 23:49:35 -0600 received badge ● Popular Question (source) 2015-12-23 04:51:39 -0600 commented answer Setting the conditions at t=0 for laplace transform with sage (instead of maxima) Thank you calc314, that was exactly what I was looking for. 2015-12-23 02:19:50 -0600 received badge ● Scholar (source) 2015-12-20 18:33:36 -0600 asked a question Setting the conditions at t=0 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