# TSARKIMEXARS122
Second order ARK IMEX scheme. This method has one explicit stage and one implicit stage.


## Options Database Key

- ***-ts_arkimex_type ars122 -*** set arkimex type to ars122





## References

- **** -*** U. Ascher, S. Ruuth, R. J. Spiteri, Implicit explicit Runge Kutta methods for time dependent Partial Differential Equations. Appl. Numer. Math. 25, (1997).



## See Also
 [](chapter_ts), `TSARKIMEX`, `TSARKIMEXType`, `TSARKIMEXSetType()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/impls/arkimex/arkimex.c.html#TSARKIMEXARS122">src/ts/impls/arkimex/arkimex.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/impls/arkimex/arkimex.c)


[Index of all TS routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
