MatCholeskyCheckShift_inline

shift the diagonals when zero pivot is detected on Cholesky factor

Synopsis

#define MatCholeskyCheckShift_inline(info,sctx,row,newshift) 0; \

Collective on Mat

Input Parameters

	info	- information about the matrix factorization
	sctx	- pointer to the struct CholeskyShift_Ctx
	row	- pivot row
	newshift	- 0: shift is unchanged; 1: shft is updated; -1: zeropivot

Note: Unlike in the ILU case there is no exit condition on nshift

we increase the shift until it converges. There is no guarantee that this algorithm converges faster or slower, or is better or worse than the ILU algorithm.

Level:developer
Location:src/mat/../../include/private/matimpl.h
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