Hi,

Just wondering if anyone can help, I've been given a question:

Verify that the solution to the inhomogeneous problem

w_t-w_xx=f(x,t) t>0

w(x,0)=0

is

w(x,t)=int _0^t int_-infty^infty f(s,v)z(x-s,t-v) dsdv

I know to verify this I need to differentiate the double integral but I'm just stuck on how to go about it as opposed to a single inetgral.

Thanks!