petsc-3.12.1 2019-10-22
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PetscGaussLobattoLegendreElementGradientCreate

computes the gradient for a single 1d GLL element

Synopsis

#include "petscdt.h" 
PetscErrorCode PetscGaussLobattoLegendreElementGradientCreate(PetscInt n,PetscReal *nodes,PetscReal *weights,PetscReal ***AA,PetscReal ***AAT)
Not Collective

Input Parameter

Output Parameter

n - the number of GLL nodes
nodes - the GLL nodes
weights - the GLL weights
AA - the stiffness element
AAT - the transpose of AA (pass in NULL if you do not need this array)

Notes

Destroy this with PetscGaussLobattoLegendreElementGradientDestroy()

You can access entries in these arrays with AA[i][j] but in memory it is stored in contiguous memory, row oriented

See Also

PetscDTGaussLobattoLegendreQuadrature(), PetscGaussLobattoLegendreElementLaplacianDestroy()

Level

beginner

Location

src/dm/dt/interface/dt.c
Index of all DT routines
Table of Contents for all manual pages
Index of all manual pages