PETSc version 3.17.0
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# DMPlexComputeInterpolatorNested

Form the local portion of the interpolation matrix I from the coarse DM to a uniformly refined DM.

### Synopsis

    #include "petscdmplex.h"
    PetscErrorCode DMPlexComputeInterpolatorNested(DM dmc, DM dmf, PetscBool isRefined, Mat In, void *user)

### Input Parameters

| dmc | - The coarse mesh
| dmf | - The fine mesh
| isRefined | - Flag indicating regular refinement, rather than the same topology
| user | - The user context

### Output Parameter

| In | - The interpolation matrix

### See Also

DMPlexComputeInterpolatorGeneral(), DMPlexComputeJacobianFEM()

### Level

developer

### Location

src/dm/impls/plex/plexfem.c
Index of all DMPLEX routines
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