# Matrix-vector multiplication in weak formulation

**URL:** https://community.freefem.org/t/matrix-vector-multiplication-in-weak-formulation/449
**Category:** General Discussion
**Created:** [May 31, 2020, 3:14pm UTC](https://community.freefem.org/t/matrix-vector-multiplication-in-weak-formulation/449 "2020-05-31T15:14:04Z")
**Posts on this page:** 1
**Showing post:** 30

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### Author: ![Lee](https://avatars.discourse-cdn.com/v4/letter/l/bc8723/32.png) [@Lee](https://community.freefem.org/u/Lee)
#### Post date: [July 29, 2020, 7:05am UTC](https://community.freefem.org/t/matrix-vector-multiplication-in-weak-formulation/449/30 "2020-07-29T07:05:25Z")

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Thanke you. I’m now using tgv=-2 in a SNESSolve iteration.

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