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| File Information |
| Description |
PCGNULL Preconditioned Conjugate Gradients Method
X = PCGNULL(A) attempts to solve the homogenious system of linear equations A*X=0 for X such that NORM(X)=1.
The coefficient matrix A must be Hermitian and positive semi-definite. If the null-space of A is more than one dimentional, i.e. A*X=0 allows multiple linear independent solutions, PCGNULL will still converge to one solution, namely, the orthoprojection of the initial guess to the null-space.
Tested under MATLAB versions 5.1-5.3. |
| MATLAB release |
MATLAB 5.3 (R11)
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