# Newton iteration of one-dimensional discontinuous galerkin finite element implicit scheme

**URL:** <https://community.freefem.org/t/newton-iteration-of-one-dimensional-discontinuous-galerkin-finite-element-implicit-scheme/2324>\
**Category:** General Discussion\
**Created:** [March 12, 2023, 1:04pm UTC](https://community.freefem.org/t/newton-iteration-of-one-dimensional-discontinuous-galerkin-finite-element-implicit-scheme/2324 "2023-03-12T13:04:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Qianrui](https://avatars.discourse-cdn.com/v4/letter/q/9fc348/32.png) [@Qianrui](https://community.freefem.org/u/Qianrui)\
**Post date:** [March 12, 2023, 1:04pm UTC](https://community.freefem.org/t/newton-iteration-of-one-dimensional-discontinuous-galerkin-finite-element-implicit-scheme/2324/1 "2023-03-12T13:04:29Z")

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Can freefem++be used to calculate discontinuous finite element implicit schemes? Is it through Newton iteration? Does Freefrem++have built-in Newton iteration?

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**Author:** ![aszaboa](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/aszaboa/32/2918_2.png) [@aszaboa](https://community.freefem.org/u/aszaboa)\
**Post date:** [March 12, 2023, 7:22pm UTC](https://community.freefem.org/t/newton-iteration-of-one-dimensional-discontinuous-galerkin-finite-element-implicit-scheme/2324/2 "2023-03-12T19:22:51Z")

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You could use PETSc SNES , e.g., [FreeFem-sources/newton-vi-2d-PETSc.edp at master · FreeFem/FreeFem-sources · GitHub](https://github.com/FreeFem/FreeFem-sources/blob/master/examples/hpddm/newton-vi-2d-PETSc.edp)