Propagation of waves. We now assume, for simplicity, that = 0. We also assume that N

Propagation of waves.

We now assume, for simplicity, that ω = 0.

We also assume that N ≫ 1, so that

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sin(k/N)~ (k/N) for k < < N. We assume that for t = 0 we have yN-1 = 1, y = 1, yn = 0 if n (1 or N-1), and y = 0 Vn.