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7.4 Solve the Laplace equation u = 0 in the square 0 < x, y <...

7.4 Solve the Laplace equation u = 0 in the square 0 < x, y < π, subject to the boundary condition u(x, 0) = u(x, π) = 1, u(0, y) = u(π, y) = 0.

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