# Extract of left and right vectors of multidimensional SVD

**URL:** https://community.freefem.org/t/extract-of-left-and-right-vectors-of-multidimensional-svd/844
**Category:** General Discussion
**Created:** [March 9, 2021, 2:16pm UTC](https://community.freefem.org/t/extract-of-left-and-right-vectors-of-multidimensional-svd/844 "2021-03-09T14:16:41Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![LucasPa](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/lucaspa/32/347_2.png) [@LucasPa](https://community.freefem.org/u/LucasPa)
#### Post date: [March 9, 2021, 3:34pm UTC](https://community.freefem.org/t/extract-of-left-and-right-vectors-of-multidimensional-svd/844/5 "2021-03-09T15:34:25Z")

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Not completely!

> There is no domain decomposition attached to `MF`

MF is not indirectly aware of the decomposition made by `buildDmesh(Th);` ? Is there a way to attach the domain decomposition to `MF` ?

I roughly understood from “mf-2d-SLEPc.edp” how to use `ChangeNumbering`. I understand that I should replace `lvectors = lvec` by `larray = lvec` where `lvec` is now `real[int,int]` of size (Vh.ndof, 10) (as in [Composite eigenvectors with SLEPc](https://community.freefem.org/t/composite-eigenvectors-with-slepc/231))

Best,

Lucas

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