petsc-3.14.6 2021-03-30

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PetscDTGaussQuadrature

create Gauss-Legendre quadrature

Synopsis

#include "petscdt.h" 
PetscErrorCode PetscDTGaussQuadrature(PetscInt npoints,PetscReal a,PetscReal b,PetscReal *x,PetscReal *w)

Not Collective

Input Arguments

	npoints	- number of points
	a	- left end of interval (often-1)
	b	- right end of interval (often +1)

Output Arguments

	x	- quadrature points
	w	- quadrature weights

References

1.

- Golub and Welsch, Calculation of Quadrature Rules, Math. Comp. 23(106), 1969.

See Also

PetscDTLegendreEval()

Level

intermediate

Location

src/dm/dt/interface/dt.c

Examples

src/ksp/ksp/tutorials/ex74.c.html

Index of all DT routines
Table of Contents for all manual pages
Index of all manual pages