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IFEM: Intro to Matrix-based FEM

nNormal computations run element-by-element

nOnly consider one element at a time

nMatrix-based computations are holistic

nOne big matrix represents the
whole system

nSolve the matrix == solve the problem

nRow of matrix solves for “Degree of Freedom”

nE.g., a node’s X coordinate

nTypically a row has only a few
nonzero entries

nAround 106 degrees of
freedom--106 rows