x = var('x')
y = function('y',x)
deq1 = diff(y,x,4)+5*diff(y,x,2)+4*y==0
soln = desolve_laplace(deq1 ,  [y,x])
soln

Kreyszig-2.14-1-U (last edited 2010-12-18 08:12:41 by kksairamphani)