# Linear Equation from FFC generated from variational formulation

**URL:** <https://fenicsproject.discourse.group/t/linear-equation-from-ffc-generated-from-variational-formulation/10675>\
**Category:** variational formulation\
**Created:** [March 14, 2023, 12:31am UTC](https://fenicsproject.discourse.group/t/linear-equation-from-ffc-generated-from-variational-formulation/10675 "2023-03-14T00:31:41Z")\
**Posts on this page:** 1\
**Showing post:** 12

<div class="post-metadata">

**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\
**Post date:** [March 15, 2023, 9:22pm UTC](https://fenicsproject.discourse.group/t/linear-equation-from-ffc-generated-from-variational-formulation/10675/12 "2023-03-15T21:22:33Z")

</div>

The code you have posted is not complete, as you have not defined `dx` and it is unclear what `dx(i)` is supposed to represent.  
Please see:[Read before posting: How do I get my question answered? - #4 by nate](https://fenicsproject.discourse.group/t/read-before-posting-how-do-i-get-my-question-answered/21/4) for examples following the forum guidelines

---

_[View the full topic](https://fenicsproject.discourse.group/t/linear-equation-from-ffc-generated-from-variational-formulation/10675)._