# Macro ThN2O for mixed vectorial and scalar finite element space

**URL:** <https://community.freefem.org/t/macro-thn2o-for-mixed-vectorial-and-scalar-finite-element-space/1731>\
**Category:** General Discussion\
**Created:** [May 10, 2022, 9:55pm UTC](https://community.freefem.org/t/macro-thn2o-for-mixed-vectorial-and-scalar-finite-element-space/1731 "2022-05-10T21:55:44Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [April 10, 2024, 5:42am UTC](https://community.freefem.org/t/macro-thn2o-for-mixed-vectorial-and-scalar-finite-element-space/1731/12 "2024-04-10T05:42:36Z")

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Why are you declaring `A` and `B` inside the brackets?

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