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- What is wrong with this version (PPCG) of conjugate gradient?
- More generally, what is wrong with steepest descent?
- The matrix A is symmetric and can be diagonalized as
usual
![](img97.gif)
- P is orthogonal matrix
- Let
![](img99.gif)
Geoffrey Fox, Northeast Parallel Architectures Center at Syracuse University, gcf@npac.syr.edu