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# TSMPRK2A22
Second Order Multirate Partitioned Runge Kutta scheme based on RK2A. This method has four stages for slow and fast parts. The refinement factor of the stepsize is 2.
r = 2, np = 2


## Options Database Key

- ***-ts_mprk_type 2a22 -*** select this scheme





## See Also
 [](ch_ts), `TSMPRK`, `TSMPRKType`, `TSMPRKSetType()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/impls/multirate/mprk.c.html#TSMPRK2A22">src/ts/impls/multirate/mprk.c</A>


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


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