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16 votes

Can one find the hodge number by counting points over finite fields?

It is worth mentioning the "Newton above Hodge" theorem. This is a way in which the point count can impose nontrivial conditions on the Hodge numbers, beyond knowing the Betti numbers. As I assume y …
David E Speyer's user avatar
9 votes
Accepted

Could the Weil zeroes of curves be evenly distributed?

If $q$ is a prime for which $2$ is a primitive root, then I claim that the Frobenius eigenvalues of the curve $y^2-y = x^q$ over $\mathbb{F}_2$ have spacing exactly $\tfrac{2 \pi}{q-1}$. This, if Arti …
David E Speyer's user avatar
7 votes

Equivalent statements of the Riemann hypothesis in the Weil conjectures

Regarding the question about higher dimensions, Scholl showed that RH in all dimensions follows from the statement: If $X$ is a smooth hypersurface in $\mathbb{P}^{d+1}$ over $\mathbb{F}_q$, then $X( …
David E Speyer's user avatar