OBSOLETE
var('x,y')
y=function('y',x)
desolve(diff(y,x,2)*x*x - 4*diff(y,x)*x + 6*y == 21/x^4, dvar = y)

SageDays/Kreyszig-2.11-11 (last edited 2010-08-11 13:51:53 by Abhi-akash)