t=var('t')
y=function('y',t)
de=diff(y,t,2)-8*y
desolve(de,y)

http://10.101.11.72/SageDays/Kreyszig-2.2-4?action=edit&backto=SageDays/SprintsHelp&template=SageDays/SprintTemplate

SageDays/Kreyszig-2.2-4 (last edited 2010-08-12 09:08:42 by prabhat)