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DORR: A tridiagonal, diagonally dominant, possibly ill-conditioned matrix

from the MMDELI

Matrix Generator DORR
Source: F. W. Dorr
Discipline: numerical linear algebra
Language: Java applet
Output format: Matrix Market format

This is a Java applet which generates a diagonally dominant, tridiagonal M-matrix which is ill-conditioned for small values of the parameter THETA>=0. All rows except the first and last have |A(i,i)| = |A(i,i-1)| + |A(i,i+1)|. The first and last rows are strictly diagonally dominant by THETA*(N+1)2, e.g. |A(1,1)| = |A(1,2)| + THETA*(N+1)2.

This generator was developed by Bruce Miller of NIST based on Nick Higham's Test Matrix Toolbox for MATLAB.

Parameters:

Norder of the matrix.
THETAaffects the amount of diagonal dominance.

Links:

The Matrix Market is a service of the Mathematical and Computational Sciences Division / Information Technology Laboratory / National Institute of Standards and Technology.

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Last change in this page: Wed Sep 22 13:34:20 US/Eastern 2004 [Comments: ]