x = var('x')
y = function('y',x)
DE = diff(y,x,x) + y
a=desolve(DE, y,x)
print a
print
# validating the output
s= 1*cos(x) + 1*sin(x)  #placing a=1;  b=1;
diff(s,x,x) + s

SageDays/Kreyszig-1.1-6 (last edited 2010-08-09 14:30:00 by GauravLuthra)