# MatStructure

Indicates if the matrix has the same nonzero structure

### Synopsis

    typedef enum {SAME_NONZERO_PATTERN,DIFFERENT_NONZERO_PATTERN,SAME_PRECONDITIONER,SUBSET_NONZERO_PATTERN} MatStructure;

Any additions/changes here MUST also be made in include/finclude/petscmat.h

### See Also

MatCopy(), KSPSetOperators(), PCSetOperators()

Level:beginner
Location: src/mat/../../include/petscmat.h
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/snes/examples/tutorials/ex1.c.html
src/snes/examples/tutorials/ex2.c.html
src/snes/examples/tutorials/ex3.c.html
src/snes/examples/tutorials/ex6.c.html
src/snes/examples/tutorials/ex14.c.html
src/snes/examples/tutorials/ex18.c.html
src/snes/examples/tutorials/ex20.c.html
src/snes/examples/tutorials/ex26.c.html
src/ts/examples/tutorials/ex1.c.html
src/ts/examples/tutorials/ex2.c.html
src/ts/examples/tutorials/ex3.c.html