# Max() in parallel

**URL:** <https://community.freefem.org/t/max-in-parallel/1278>\
**Category:** General Discussion\
**Created:** [October 24, 2021, 2:15pm UTC](https://community.freefem.org/t/max-in-parallel/1278 "2021-10-24T14:15:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![yongxing](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/yongxing/32/3632_2.png) [@yongxing](https://community.freefem.org/u/yongxing)\
**Post date:** [October 24, 2021, 2:15pm UTC](https://community.freefem.org/t/max-in-parallel/1278/1 "2021-10-24T14:15:54Z")

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Is there an easy method to compute the maximum of `u[]` in parallel code?

`fespace Vh(Th, P2);`  
`Vh u;`

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**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [October 24, 2021, 2:40pm UTC](https://community.freefem.org/t/max-in-parallel/1278/2 "2021-10-24T14:40:20Z")

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Yes using `mpiMAX`, cf. [Parallelization](https://doc.freefem.org/documentation/parallelization.html#mpi-constants).