# 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:** 27

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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:** [July 28, 2020, 7:10pm UTC](https://community.freefem.org/t/matrix-vector-multiplication-in-weak-formulation/449/27 "2020-07-28T19:10:50Z")

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The boundary conditions have to be set in your initial guess.

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