t=var('t')
y=function('y',t)
de=4*diff(y,t,2)-4*diff(y,t)-3*y
desolve(de,[y,t],ics=[-2,exp(1),-exp(1)/2])

SageDays/Kreyszig-2.2-17 (last edited 2010-08-10 13:27:06 by aitians)