Modular collapse conjecture for locally compact Moufang-type quasigroups

Let QQ be a locally compact Hausdorff topological quasigroup satisfying the Moufang-type identity (N1)(N1). Assume that QQ admits a quasi-invariant measure with modular cocycle jj.

Modular collapse conjecture. The cocycle collapses:

j1.j\equiv 1.

In particular, the translation geometry becomes unimodular in the measure-theoretic sense. The conjecture proposes a measure-theoretic interpretation of Kunen's theorem by asserting that the (N1)(N1) identity forces unimodularity whenever a suitable quasi-invariant measure exists. The paper develops the cocycle framework but does not establish this collapse.

Sources & referencesView supporting material

Primary source

Takao Inoué, “Haar-Type Measures on Topological Quasigroups and Kunen's Theorem”, arXiv:2603.06174 (2026).

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