The period-index conjecture for Brauer groups of complex varieties

About 3 years old · traced to

Let XX be a smooth, connected, projective variety over C\mathbf C. For a Brauer class αinBr⁡(X)\alpha in \operatorname{Br}(X), its period and index are denoted by per⁡(α)\operatorname{per}(\alpha) and ind⁡(α)\operatorname{ind}(\alpha), respectively.

Period-index conjecture. For every αinBr⁡(X)\alpha in \operatorname{Br}(X),

ind⁡(α)\dividesper⁡(α)dim⁡X−1.\operatorname{ind}(\alpha) \divides \operatorname{per}(\alpha)^{\dim X-1}.

This is the projective geometric form of the period-index conjecture for Brauer groups of function fields. The supplied paper’s abstract states that the complex-analytic version is false for infinitely many Brauer classes on a general complex torus of dimension at least three, while the status of the precise projective statement here is not specified in the supplied text.

References

Primary source

James Hotchkiss, “The period-index problem for complex tori”, arXiv:2301.09293 (2023).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.