PetscQuadraturePushForward#

Push forward a quadrature functional under an affine transformation.

Synopsis#

#include "petscdt.h" 
PetscErrorCode PetscQuadraturePushForward(PetscQuadrature q, PetscInt imageDim, const PetscReal origin[], const PetscReal originImage[], const PetscReal J[], PetscInt formDegree, PetscQuadrature *Jinvstarq)

Collective

Input Parameters#

  • q - the quadrature functional

  • imageDim - the dimension of the image of the transformation

  • origin - a point in the original space

  • originImage - the image of the origin under the transformation

  • J - the Jacobian of the image: an [imageDim x dim] matrix in row major order

  • formDegree - transform the quadrature weights as k-forms of this form degree (if the number of components is a multiple of (dim choose formDegree), it is assumed that they represent multiple k-forms) [see PetscDTAltVPullback() for interpretation of formDegree]

Output Parameter#

  • Jinvstarq - a quadrature rule where each point is the image of a point in the original quadrature rule, and where the k-form weights have been pulled-back by the pseudoinverse of J to the k-form weights in the image space.

Note#

The new quadrature rule will have a different number of components if spaces have different dimensions. For example, pushing a 2-form forward from a two dimensional space to a three dimensional space changes the number of components from 1 to 3.

See Also#

PetscQuadrature, PetscDTAltVPullback(), PetscDTAltVPullbackMatrix()

Level#

intermediate

Location#

src/dm/dt/interface/dt.c

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