petsc-3.4.5 2014-06-29

MatCreateLRC

Creates a new matrix object that behaves like A + U*V'

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatCreateLRC(Mat A,Mat U, Mat V,Mat *N)

Collective on Mat

Input Parameter

	A	- the (sparse) matrix
	U. V	- two dense rectangular (tall and skinny) matrices

Output Parameter

N -the matrix that represents A + U*V'

Notes: The matrix A + U*V' is not formed! Rather the new matrix object performs the matrix-vector product by first multiplying by A and then adding the other term

Level:intermediate
Location:src/mat/impls/lrc/lrc.c
Index of all Mat routines
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Index of all manual pages