# Additive Schwarz method

**URL:** <https://community.freefem.org/t/additive-schwarz-method/1598>\
**Category:** General Discussion\
**Created:** [March 14, 2022, 7:00am UTC](https://community.freefem.org/t/additive-schwarz-method/1598 "2022-03-14T07:00:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![AbuAzzan](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/abuazzan/32/1645_2.png) [@AbuAzzan](https://community.freefem.org/u/AbuAzzan)\
**Post date:** [March 14, 2022, 7:00am UTC](https://community.freefem.org/t/additive-schwarz-method/1598/1 "2022-03-14T07:00:21Z")

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Hi to all of you.  
First, I would like to thank all of you for sharing your enriching experience with us.  
I found a good and easy example of the Schwarz alternating method in the FreeFEM++ documentation (V4.6) for a linear elliptic problem. my goal is to find the maximum norm error estimate between the exact solution and the iterated Schwarz sequence. I adapted to my nonlinear elliptic PDE and it successfully worked.  
Now, I am asking whether somebody has a ready example of the additive Schwarz method as I could not find anyone in the mentioned documentation. In fact, all it was mentioned was about the parallel usage of the software.  
Your assistance is hugely appreciated.