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Computational geometry
 
Examplary MATLAB Codes for the Boundary Knot Method  Update Link / Bad Link
The boundary knot method (BKM) is a new distance function boundary-type technique, being truly meshfree, spectral convergent (numerical observations), symmetric (self-adjoint PDEs), integration-free, and very easy to learn and implement. The method is developed as an alternative to the method of fundamental solution to avoid the fictitious boundary as well as to the BEM to overcome the low accuracy, singular integration and mesh. We have successfully tested the BKM to the Helmholtz, diffusion, convection-diffusion, and Possion equations under very irregular 2D and 3D domains. This site is to provide some MATLAB codes verifying efficiency, simplicity, and prowess of the BKM.

http://heim.ifi.uio.no/~wenc/html/MatlabBKM.htm
Submitted Jul 04, 2004 by Wen Chen
Updated Jul 06, 2004
SAGA Toolbox  Update Link / Bad Link
SaGA is a collection of functions dealing with various aspects of geometrical modeling and spatial data analysis.

http://puddle.mit.edu/~glenn/kirill/SAGAHTML/saga.html
Submitted Jul 01, 1999
Computational Mathematics  Update Link / Bad Link
Computational Mathematics: Models, Methods and Analysis with MATLAB and MPI.

http://www4.ncsu.edu/eos/users/w/white/www/book/cma.htm
Submitted Jun 06, 2005 by MATLAB Central
QMG  Update Link / Bad Link
The QMG package does finite element mesh generation in two and three dimensions. The package includes geometric modeling software, the mesh generator itself, and a finite element solver.

http://www.cs.cornell.edu/Info/People/vavasis/qmg-home.html
Submitted Jul 05, 1999
area.m  Update Link / Bad Link
Compute the area of any 2-d polygon.

http://www.mathtools.net/files/net/area.zip
Submitted Jul 19, 1999
sphangle.m  Update Link / Bad Link
Spherical angle and distance between 2 points on a unit sphere.

http://www.mathtools.net/files/net/sphangle.zip
Submitted Jul 22, 1999
triangul.m  Update Link / Bad Link
Solve the problem: Given a nonsingular N by N matrix A, find P and Q such that A=P*Q, P and Q symmetric.

http://www.mathtools.net/files/net/triangul.zip
Submitted Jul 19, 1999

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