x = var('x')
y=function('y',x)
DE = diff(y,x,2)+y-2*x
print "GS:", desolve(DE, [y,x], ics=[0,-1,8])
#check for particular solution
yp = 2*x
V = diff(yp,x,2)+yp-2*x
if V == 0:
    print "yp = ", yp, "is a particular solution"
else:
    print "yp = ", yp, "is not a particular solution"

SageDays/Kreyszig-2.8-9 (last edited 2010-08-11 12:52:40 by zubinmehta)