# Double Dot Product or Inner Product of Two Tensors

**URL:** <https://community.freefem.org/t/double-dot-product-or-inner-product-of-two-tensors/1756>\
**Category:** General Discussion\
**Created:** [May 19, 2022, 4:23am UTC](https://community.freefem.org/t/double-dot-product-or-inner-product-of-two-tensors/1756 "2022-05-19T04:23:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![D\_N\_Sarkar](https://avatars.discourse-cdn.com/v4/letter/d/0ea827/32.png) [@D\_N\_Sarkar](https://community.freefem.org/u/D_N_Sarkar)\
**Post date:** [May 19, 2022, 4:23am UTC](https://community.freefem.org/t/double-dot-product-or-inner-product-of-two-tensors/1756/1 "2022-05-19T04:23:03Z")

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I have two tensors. How do I compute the double dot product or inner product of the two tensors in FreeFEM?