Consider the lowest order Lagrange finite element method for the boundary value problem -u = f...
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Consider the lowest order Lagrange finite element method for the boundary value problem -u" = f in the interval (0, 1), with zero Dirichlet boundary conditions. Prove that the matrix of the resulting finite element system is invertible. Consider the lowest order Lagrange finite element method for the boundary value problem -u" = f in the interval (0, 1), with zero Dirichlet boundary conditions. Prove that the matrix of the resulting finite element system is invertible.
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