petsc-3.14.5 2021-03-03
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# TSCreate

This function creates an empty timestepper. The problem type can then be set with TSSetProblemType() and the type of solver can then be set with TSSetType().

### Synopsis

    #include "petscts.h"
    PetscErrorCode  TSCreate(MPI_Comm comm, TS *ts)

Collective

### Input Parameter

| comm | - The communicator

### Output Parameter

| ts | - The TS

### Developer Notes

TS essentially always creates a SNES object even though explicit methods do not use it. This is unfortunate and should be fixed at some point. The flag snes->usessnes indicates if the particular method does use SNES and regulates if the information about the SNES is printed in TSView(). TSSetFromOptions() does call SNESSetFromOptions() which can lead to users being confused by help messages about meaningless SNES options.

### See Also

TSSetType(), TSSetUp(), TSDestroy(), TSSetProblemType()

### Level

beginner

### Location

src/ts/interface/tscreate.c

### Examples

src/ts/tutorials/ex1.c.html
src/ts/tutorials/ex2.c.html
src/ts/tutorials/ex3.c.html
src/ts/tutorials/ex4.c.html
src/ts/tutorials/ex5.c.html
src/ts/tutorials/ex6.c.html
src/ts/tutorials/ex7.c.html
src/ts/tutorials/ex8.c.html
src/ts/tutorials/ex9.c.html
src/ts/tutorials/ex10.c.html
src/ts/tutorials/ex11.c.html

### Implementations

TSCreate_ARKIMEX in src/ts/impls/arkimex/arkimex.c
TSCreate_BDF in src/ts/impls/bdf/bdf.c
TSCreate_EIMEX in src/ts/impls/eimex/eimex.c
TSCreate_Euler in src/ts/impls/explicit/euler/euler.c
TSCreate_RK in src/ts/impls/explicit/rk/rk.c
TSCreate_SSP in src/ts/impls/explicit/ssp/ssp.c
TSCreate_GLEE in src/ts/impls/glee/glee.c
TSCreate_Alpha in src/ts/impls/implicit/alpha/alpha1.c
TSCreate_Alpha2 in src/ts/impls/implicit/alpha/alpha2.c
TSCreate_DiscGrad in src/ts/impls/implicit/discgrad/tsdiscgrad.c
TSCreate_GLLE in src/ts/impls/implicit/glle/glle.c
TSCreate_Radau5 in src/ts/impls/implicit/radau5/radau5.c
TSCreate_Sundials in src/ts/impls/implicit/sundials/sundials.c
TSCreate_Theta in src/ts/impls/implicit/theta/theta.c
TSCreate_BEuler in src/ts/impls/implicit/theta/theta.c
TSCreate_CN in src/ts/impls/implicit/theta/theta.c
TSCreate_Mimex in src/ts/impls/mimex/mimex.c
TSCreate_MPRK in src/ts/impls/multirate/mprk.c
TSCreate_Pseudo in src/ts/impls/pseudo/posindep.c
TSCreate_RosW in src/ts/impls/rosw/rosw.c
TSCreate_BasicSymplectic in src/ts/impls/symplectic/basicsymplectic/basicsymplectic.c
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages