PETSc version 3.15.5
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# TSPseudoSetTimeStep

Sets the user-defined routine to be called at each pseudo-timestep to update the timestep.

### Synopsis

    #include "petscts.h"
    PetscErrorCode  TSPseudoSetTimeStep(TS ts,PetscErrorCode (*dt)(TS,PetscReal*,void*),void *ctx)

Logically Collective on TS

### Input Parameters

| ts | - timestep context
| dt | - function to compute timestep
| ctx | - [optional] user-defined context for private data required by the function (may be NULL)

### Calling sequence of func

     func (TS ts,PetscReal *newdt,void *ctx);

| newdt | - the newly computed timestep
| ctx | - [optional] timestep context

### Notes

The routine set here will be called by TSPseudoComputeTimeStep() during the timestepping process. If not set then TSPseudoTimeStepDefault() is automatically used

### See Also

TSPseudoTimeStepDefault(), TSPseudoComputeTimeStep()

### Level

intermediate

### Location

src/ts/impls/pseudo/posindep.c

### Examples

src/ts/tutorials/ex1.c.html

### Implementations

TSPseudoSetTimeStep_Pseudo in src/ts/impls/pseudo/posindep.c
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