The commutativity conjecture for the identity component of a pseudofinite group's Bohr compactification

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Let GG be a pseudofinite group, meaning an infinite group elementarily equivalent to an ultraproduct of finite groups, and let bGbG denote its Bohr compactification. Write (bG)0(bG)^{0} for the connected component of the identity in bGbG.

Commutativity conjecture. If GG is a pseudofinite group, then (bG)0(bG)^{0} is commutative.

This conjecture is equivalent to a negative answer to the paper's Question 1.4, modulo passing to connected components and allowing a finite product of compact simple Lie groups in place of a single one. Its status is not resolved in the supplied source.

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Sources & referencesView supporting material

Primary source

Anand Pillay, “Remarks on compactifications of pseudofinite groups”, arXiv:1509.02895 (2015).

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