Posted by **Anonymous** on Monday, March 9, 2009 at 1:43pm.

Not sure how to approach this problem.

Prove the comparison principle for the diffusion equation, Ut = K*Uxx. If u and v are solutions, and if u <= v for t = 0, x = 0, and x=l, then u <= v for 0 <= t < infinity, and 0 <= x <= l

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