# Meaning of 'anisomax'?

**URL:** https://community.freefem.org/t/meaning-of-anisomax/2735
**Category:** General Discussion
**Created:** [September 29, 2023, 4:00pm UTC](https://community.freefem.org/t/meaning-of-anisomax/2735 "2023-09-29T16:00:30Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![jna1g18](https://avatars.discourse-cdn.com/v4/letter/j/77aa72/32.png) [@jna1g18](https://community.freefem.org/u/jna1g18)
#### Post date: [September 29, 2023, 4:00pm UTC](https://community.freefem.org/t/meaning-of-anisomax/2735/1 "2023-09-29T16:00:30Z")

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Hi all, very quick question:

can someone give me a brief explanation of what ‘anisomax’ in adaptmesh means? I’m assuming that it’s a measure of the anisotropy of the mesh?

Many thanks!

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### Author: ![frederichecht](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/frederichecht/32/15_2.png) [@frederichecht](https://community.freefem.org/u/frederichecht)
#### Post date: [October 1, 2023, 8:42am UTC](https://community.freefem.org/t/meaning-of-anisomax/2735/2 "2023-10-01T08:42:14Z")

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Yes, the anisotropy a a triangle is given where \xi is a direction and K the simplex, dans B\_K the linear part of affine transformation go from \hat{K} to K where \hat{K} is the equilateral simplex of size 1.

h\_{K,\xi} = \frac{ || \xi||}{||B\_{K}^{-1}\xi||}.