# Integrating a discontinuous field over a curve bounding a regio,n

**URL:** <https://fenicsproject.discourse.group/t/integrating-a-discontinuous-field-over-a-curve-bounding-a-regio-n/16532>\
**Category:** variational formulation\
**Tags:** dolfinx\
**Created:** [December 17, 2024, 9:28am UTC](https://fenicsproject.discourse.group/t/integrating-a-discontinuous-field-over-a-curve-bounding-a-regio-n/16532 "2024-12-17T09:28:06Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**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:** [December 17, 2024, 9:50am UTC](https://fenicsproject.discourse.group/t/integrating-a-discontinuous-field-over-a-curve-bounding-a-regio-n/16532/2 "2024-12-17T09:50:23Z")

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See for instance: [Add one-sided integration example as example of custom integration · Issue #158 · jorgensd/dolfinx-tutorial · GitHub](https://github.com/jorgensd/dolfinx-tutorial/issues/158)  
as explained in: [Wrong FacetNormal vector on internal boundaries - #3 by sbhasan](https://fenicsproject.discourse.group/t/wrong-facetnormal-vector-on-internal-boundaries/12887/3) or [Hyperelastic deformation with applied pressue on internal surface - #2 by dokken](https://fenicsproject.discourse.group/t/hyperelastic-deformation-with-applied-pressue-on-internal-surface/14589/2)

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