Question: Solve the boundary value problem u xx + u yy =0, x R, y > 0, u(x, 0) = 1, |x| L; u(x, 0) =

Solve the boundary value problem

uxx + uyy =0, x R, y > 0,

u(x, 0) = 1, |x| L;

u(x, 0) = 0, |x| >L.

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