# PetscDTSimplexQuadratureType
A description of classes of quadrature rules for simplices 
## Synopsis
```
typedef enum {
  PETSCDTSIMPLEXQUAD_DEFAULT = -1,
  PETSCDTSIMPLEXQUAD_CONIC   = 0,
  PETSCDTSIMPLEXQUAD_MINSYM
} PetscDTSimplexQuadratureType;
```


```none
`PETSCDTSIMPLEXQUAD_DEFAULT` - Quadrature rule chosen by PETSc
```
```none
`PETSCDTSIMPLEXQUAD_CONIC`   - Quadrature rules constructed as
```
conically-warped tensor products of 1D
Gauss-Jacobi quadrature rules.  These are
explicitly computable in any dimension for any
degree, and the tensor-product structure can be
exploited by sum-factorization methods, but
they are not efficient in terms of nodes per
polynomial degree.
```none
`PETSCDTSIMPLEXQUAD_MINSYM`  - Quadrature rules that are fully symmetric
```
(symmetries of the simplex preserve the nodes
and weights) with minimal (or near minimal)
number of nodes.  In dimensions higher than 1
these are not simple to compute, so lookup
tables are used.


## See Also
 `PetscDTSimplexQuadrature()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscdt.h.html#PetscDTSimplexQuadratureType">include/petscdt.h</A>


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