# DM

Abstract PETSc object that manages an abstract grid object

### Synopsis

    typedef struct _p_DM* DM;

Notes: The DA object and the VecPack object are examples of DMs

Though the DA objects require the petscsnes.h include files the DM library is NOT dependent on the SNES or KSP library. In fact, the KSP and SNES libraries depend on DM. (This is not great design, but not trivial to fix).

### See Also

VecPackCreate(), DA, VecPack

Level:intermediate
Location: src/dm/da/../../../include/petscda.h
Index of all DA routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/ksp/ksp/examples/tutorials/ex22.c.html
src/ksp/ksp/examples/tutorials/ex25.c.html
src/ksp/ksp/examples/tutorials/ex28.c.html
src/ksp/ksp/examples/tutorials/ex29.c.html
src/ksp/ksp/examples/tutorials/ex32.c.html
src/ksp/ksp/examples/tutorials/ex33.c.html
src/ksp/ksp/examples/tutorials/ex34.c.html
src/snes/examples/tutorials/ex18.c.html
src/snes/examples/tutorials/ex19.c.html
src/snes/examples/tutorials/ex20.c.html
src/snes/examples/tutorials/ex22.c.html