# Implementation BDM2

**URL:** <https://community.freefem.org/t/implementation-bdm2/956>\
**Category:** General Discussion\
**Created:** [April 30, 2021, 6:07pm UTC](https://community.freefem.org/t/implementation-bdm2/956 "2021-04-30T18:07:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![LIU6925](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/liu6925/32/545_2.png) [@LIU6925](https://community.freefem.org/u/LIU6925)\
**Post date:** [April 30, 2021, 6:07pm UTC](https://community.freefem.org/t/implementation-bdm2/956/1 "2021-04-30T18:07:47Z")

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Hi,

I saw that in FreeFem there are the mixed element spaces RT1, RT1Ortho, RT2, RT2Ortho, BDM1, BDM1Ortho.

I need to use BDM2 for a problem (2D mesh). Has the space BDM2 already been implemented?

Thank you in advance

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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:** [May 2, 2021, 7:50am UTC](https://community.freefem.org/t/implementation-bdm2/956/2 "2021-05-02T07:50:34Z")

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Sorry not at all,  
but if you have de basic function and the interpolation formula it is not so difficult.  
to add