# Inforce homogeneous Neumann BCs using DG FEM

**URL:** <https://community.freefem.org/t/inforce-homogeneous-neumann-bcs-using-dg-fem/3339>\
**Category:** General Discussion\
**Created:** [June 24, 2024, 1:24am UTC](https://community.freefem.org/t/inforce-homogeneous-neumann-bcs-using-dg-fem/3339 "2024-06-24T01:24:54Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![fb77](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/fb77/32/3796_2.png) [@fb77](https://community.freefem.org/u/fb77)\
**Post date:** [June 24, 2024, 1:44pm UTC](https://community.freefem.org/t/inforce-homogeneous-neumann-bcs-using-dg-fem/3339/4 "2024-06-24T13:44:36Z")

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You can just multiply by `(nTonEdge-1)` to delete the boundary edges,  
see [About intalledges and internal edges - #2 by fb77](https://community.freefem.org/t/about-intalledges-and-internal-edges/3231/2)

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