Profinite tensor powers
Abstract
We discuss the problem of defining a tensor product of profinitely many copies of a vector space , and propose a definition in the special situation that (1) is finite-dimensional over , and (2) the profinite indexing the tensor factors is acted on with finitely many orbits by a pro--group. The "mcc" on the tensor sign stands for "magnetized and conditionally convergent." A variant construction makes sense when is a bimodule over a ring of the form , and the index set has the profinite version of a cyclic order. The definition organizes some computations in Heegaard Floer homology: it can be pitched as a computation of the Heegaard Floer theory of some pro--manifolds, though we do not know how to define such a thing.
Cite
@article{arxiv.2604.04367,
title = {Profinite tensor powers},
author = {David Treumann and C. -M. Michael Wong},
journal= {arXiv preprint arXiv:2604.04367},
year = {2026}
}
Comments
36 pages, 3 figures