GMatCreateUzawa

Creates a container matrix for the Uzawa system matrix B^T A^{-1} B.

#include "petscsles.h" 
#include "gsolver.h" 
int GMatCreateUzawa(GMat A, GMat B, SLES sles, GMat *gmat)

	A	- The square (0,0) block of the original saddle-point matrix
	B	- The rectangular (0,1) block of the original saddle-point matrix
	sles	- The solver used to invert A

gmat -The discrete operator