x = var('x')
y = function('y',x)
deq1 = diff(y,x,3)-diff(y,x,2)-diff(y,x)+y==0
soln = desolve_laplace(deq1 ,  [y,x] , ics=[2,1,0])
soln
plot(y)

Kreyszig-2.14-13-U (last edited 2010-12-17 11:46:32 by harsha)