The **second trace moment** of a Sato-Tate group $G$ is the expected value of the square of the trace of a random element of $G$ (under its Haar measure).

When $G$ is the Sato-Tate group of an abelian variety, this is equal to the dimension of its geometric endomorphism algebra [arXiv:1910.00518, MR:4038255].

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- Last edited by Andrew Sutherland on 2021-03-19 21:33:30

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- 2021-03-19 21:33:30 by Andrew Sutherland
- 2021-03-19 21:20:49 by Andrew Sutherland
- 2021-03-19 21:16:56 by Andrew Sutherland

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