This is a Java applet which generates generates a matrix with unit diagonal, ones in its last column, and -C in the lower triangle. This yields a rounding error growth factor of (1+C)^{N-1} for Gauss elimination with partial pivoting. The case C=1 is Wilkinson's example of a matrix whose growth factor is maximal.

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

Parameters:

N

order of the matrix

C

negative of lower triangular elements (0 <= C <= 1)