The.Algorithm.Design.Manual.Springer-Verlag.1998

The.Algorithm.Design.Manual.Springer-Verlag.1998 The.Algorithm.Design.Manual.Springer-Verlag.1998

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Matrix Multiplication Related Problems: Solving linear equations (see page ), shortest path (see page ). Next: Determinants and Permanents Up: Numerical Problems Previous: Bandwidth Reduction Algorithms Mon Jun 2 23:33:50 EDT 1997 file:///E|/BOOK/BOOK3/NODE138.HTM (4 of 4) [19/1/2003 1:30:18]

Determinants and Permanents Next: Constrained and Unconstrained Optimization Up: Numerical Problems Previous: Matrix Multiplication Determinants and Permanents Input description: An matrix M. Problem description: What is the determinant |M| or the permanent perm(M) of the matrix m? Discussion: Determinants of matrices provide a clean and useful abstraction in linear algebra that can used to solve a variety of problems: ● Testing whether a matrix is singular, meaning that the matrix does not have an inverse. A matrix M is singular iff |M| = 0. ● Testing whether a set of d points lies on a plane in fewer than d dimensions. If so, the system of equations they define is singular, so |M| = 0. ● Testing whether a point lies to the left or right of a line or plane. This problem reduces to testing whether the sign of a determinant is positive or negative, as discussed in Section . ● Computing the area or volume of a triangle, tetrahedron, or other simplicial complex. These quantities are a function of the magnitude of the determinant, as discussed in Section . file:///E|/BOOK/BOOK3/NODE139.HTM (1 of 3) [19/1/2003 1:30:19]

Matrix Multiplication<br />

Related Problems: Solving linear equations (see page ), shortest path (see page ).<br />

Next: Determinants and Permanents Up: Numerical Problems Previous: Bandwidth Reduction<br />

<strong>Algorithm</strong>s<br />

Mon Jun 2 23:33:50 EDT 1997<br />

file:///E|/BOOK/BOOK3/NODE138.HTM (4 of 4) [19/1/2003 1:30:18]

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