:orphan:
# MatType
String with the name of a PETSc matrix type 
## Synopsis
```
typedef const char *MatType;
#define MATSAME                      "same"
#define MATMAIJ                      "maij"
#define MATSEQMAIJ                   "seqmaij"
#define MATMPIMAIJ                   "mpimaij"
#define MATKAIJ                      "kaij"
#define MATSEQKAIJ                   "seqkaij"
#define MATMPIKAIJ                   "mpikaij"
#define MATIS                        "is"
#define MATAIJ                       "aij"
#define MATSEQAIJ                    "seqaij"
#define MATMPIAIJ                    "mpiaij"
#define MATAIJCRL                    "aijcrl"
#define MATSEQAIJCRL                 "seqaijcrl"
#define MATMPIAIJCRL                 "mpiaijcrl"
#define MATAIJCUSPARSE               "aijcusparse"
#define MATSEQAIJCUSPARSE            "seqaijcusparse"
#define MATMPIAIJCUSPARSE            "mpiaijcusparse"
#define MATAIJHIPSPARSE              "aijhipsparse"
#define MATSEQAIJHIPSPARSE           "seqaijhipsparse"
#define MATMPIAIJHIPSPARSE           "mpiaijhipsparse"
#define MATAIJKOKKOS                 "aijkokkos"
#define MATSEQAIJKOKKOS              "seqaijkokkos"
#define MATMPIAIJKOKKOS              "mpiaijkokkos"
#define MATAIJVIENNACL               "aijviennacl"
#define MATSEQAIJVIENNACL            "seqaijviennacl"
#define MATMPIAIJVIENNACL            "mpiaijviennacl"
#define MATAIJPERM                   "aijperm"
#define MATSEQAIJPERM                "seqaijperm"
#define MATMPIAIJPERM                "mpiaijperm"
#define MATAIJSELL                   "aijsell"
#define MATSEQAIJSELL                "seqaijsell"
#define MATMPIAIJSELL                "mpiaijsell"
#define MATAIJMKL                    "aijmkl"
#define MATSEQAIJMKL                 "seqaijmkl"
#define MATMPIAIJMKL                 "mpiaijmkl"
#define MATBAIJMKL                   "baijmkl"
#define MATSEQBAIJMKL                "seqbaijmkl"
#define MATMPIBAIJMKL                "mpibaijmkl"
#define MATSHELL                     "shell"
#define MATCENTERING                 "centering"
#define MATDENSE                     "dense"
#define MATDENSECUDA                 "densecuda"
#define MATDENSEHIP                  "densehip"
#define MATSEQDENSE                  "seqdense"
#define MATSEQDENSECUDA              "seqdensecuda"
#define MATSEQDENSEHIP               "seqdensehip"
#define MATMPIDENSE                  "mpidense"
#define MATMPIDENSECUDA              "mpidensecuda"
#define MATMPIDENSEHIP               "mpidensehip"
#define MATELEMENTAL                 "elemental"
#define MATSCALAPACK                 "scalapack"
#define MATBAIJ                      "baij"
#define MATSEQBAIJ                   "seqbaij"
#define MATMPIBAIJ                   "mpibaij"
#define MATMPIADJ                    "mpiadj"
#define MATSBAIJ                     "sbaij"
#define MATSEQSBAIJ                  "seqsbaij"
#define MATMPISBAIJ                  "mpisbaij"
#define MATMFFD                      "mffd"
#define MATNORMAL                    "normal"
#define MATNORMALHERMITIAN           "normalh"
#define MATLRC                       "lrc"
#define MATSCATTER                   "scatter"
#define MATBLOCKMAT                  "blockmat"
#define MATCOMPOSITE                 "composite"
#define MATFFT                       "fft"
#define MATFFTW                      "fftw"
#define MATSEQCUFFT                  "seqcufft"
#define MATSEQHIPFFT                 "seqhipfft"
#define MATTRANSPOSEMAT              PETSC_DEPRECATED_MACRO("GCC warning \"MATTRANSPOSEMAT macro is deprecated use MATTRANSPOSEVIRTUAL (since version 3.18)\"") "transpose"
#define MATTRANSPOSEVIRTUAL          "transpose"
#define MATHERMITIANTRANSPOSEVIRTUAL "hermitiantranspose"
#define MATSCHURCOMPLEMENT           "schurcomplement"
#define MATPYTHON                    "python"
#define MATHYPRE                     "hypre"
#define MATHYPRESTRUCT               "hyprestruct"
#define MATHYPRESSTRUCT              "hypresstruct"
#define MATSUBMATRIX                 "submatrix"
#define MATLOCALREF                  "localref"
#define MATNEST                      "nest"
#define MATPREALLOCATOR              "preallocator"
#define MATSELL                      "sell"
#define MATSEQSELL                   "seqsell"
#define MATMPISELL                   "mpisell"
#define MATDUMMY                     "dummy"
#define MATLMVM                      "lmvm"
#define MATLMVMDFP                   "lmvmdfp"
#define MATLMVMBFGS                  "lmvmbfgs"
#define MATLMVMSR1                   "lmvmsr1"
#define MATLMVMBROYDEN               "lmvmbroyden"
#define MATLMVMBADBROYDEN            "lmvmbadbroyden"
#define MATLMVMSYMBROYDEN            "lmvmsymbroyden"
#define MATLMVMSYMBADBROYDEN         "lmvmsymbadbroyden"
#define MATLMVMDIAGBROYDEN           "lmvmdiagbroyden"
#define MATCONSTANTDIAGONAL          "constantdiagonal"
#define MATHTOOL                     "htool"
#define MATH2OPUS                    "h2opus"

```



## Note
[](doc_matrix) for a table of available matrix types


## See Also
 [](doc_matrix), [](ch_matrices), `MatSetType()`, `Mat`, `MatSolverType`, `MatRegister()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscmat.h.html#MatType">include/petscmat.h</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/tutorials/ex8.c.html">src/mat/tutorials/ex8.c</A><BR>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/include/petscmat.h)


[Index of all Mat routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)