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Results tagged with finite-element-method
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user 85484
The finite element method is a popular method for approximating numerically on a computer the solution of partial differential equations. It is based on a variational (weak) formulation of the PDE, followed by discretization on a finite-dimensional ansatz space which reduces the problem to a sparse linear algebra one.
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Weak form of the Laplace-Beltrami operator on closed manifolds
Suppose we are dealing with diffusion over a boundaryless manifold $M$ (for simplicity let's say it's a surface). In that case, we have
\begin{align}
\int_M W \Delta U \mathrm{d} x & = -\int_M \nabla …
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