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Laplacian in 1D, 2D, or 3D 1.0
File ID: 86142

Laplacian in 1D, 2D, or 3D 1.0
Download Laplacian in 1D, 2D, or 3D 1.0http://www.mathworks.comReport Error Link
License: Shareware
File Size: 10.0 KB
Downloads: 11
Submit Rating:
Laplacian in 1D, 2D, or 3D 1.0 Description
Description: The code computes the exact eigenpairs of (1-3)D negative Laplacian on a rectangular finite-difference grid for combinations of Dirichlet, Neumann, and Periodic boundary conditions using explicit formulas from

The code can also compute the sparse matrix itself, using Kronecker sums of 1D Laplacians. For more information on tensor sums, see

Example, compute everything for 3D negative Laplacian with mixed boundary conditions:
[lambda,V,A] = laplacian([100,45,55],{'DD' 'NN' 'P'}, 20);
Compute only the eigenvalues:
lambda = laplacian([100,45,55],{'DD' 'NN' 'P'}, 20);
Compute the matrix only:
[~,~,A] = laplacian([100,45,55],{'DD' 'NN' 'P'});

GNU OCTAVE compatible.

This code is a part of the BLOPEX eigensolver package, see
or go directly to

Copyright owners: Bryan C. Smith and Andrew V. Knyazev

License: Shareware

Related: eigenvalueslambda, Compute, onlya, Gnu, octave, 039p039, 039nn039, Mixed, conditionslambdava, laplacian, compatiblethis, blopex, bryan, smith, andrew, knyazev, owners, eigensolver

O/S:BSD, Linux, Solaris, Mac OS X

File Size: 10.0 KB

Downloads: 11

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