# Numerical integration

**URL:** <https://community.freefem.org/t/numerical-integration/1810>\
**Category:** General Discussion\
**Created:** [June 15, 2022, 9:05am UTC](https://community.freefem.org/t/numerical-integration/1810 "2022-06-15T09:05:14Z")\
**Posts on this page:** 3\
**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:** [June 15, 2022, 9:05am UTC](https://community.freefem.org/t/numerical-integration/1810/1 "2022-06-15T09:05:14Z")

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Hello, what does the symbol in the red circle mean? Linear element?

 ![屏幕截图 2022-06-15 170213](https://canada1.discourse-cdn.com/flex030/uploads/freefem/original/2X/d/dc06497a406b0a5bca0fb460ca82874a8c718a50.png)

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**Author:** ![frederichecht](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/frederichecht/32/15_2.png) [@frederichecht](https://community.freefem.org/u/frederichecht)\
**Post date:** [June 15, 2022, 12:24pm UTC](https://community.freefem.org/t/numerical-integration/1810/2 "2022-06-15T12:24:29Z")

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Remark, qforder is exact +1 ,  
No other symbol.

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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:** [June 15, 2022, 1:03pm UTC](https://community.freefem.org/t/numerical-integration/1810/3 "2022-06-15T13:03:01Z")

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According to your reply, the problem has been solved. Thank you.