Examens corriges

Exercise Sheet 7

on Rd × (0,?), w(x,0) = f(x) on Rd,. ?tw(x,0) = g(x) on Rd. (i) Prove: If d = 1, then D'Alembert's formula holds: w(x, t) = f(x + t) ? f(x ? t). 2. +. 1.





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