Positive-relator quotient conjecture for reductions to amenable groups

Let (G,P)(G,P) be an ordered group. Let p1,p2\ninPp_1,p_2\nin P be incomparable, meaning p1≰p2p_1\not\leq p_2 and p1≱p2p_1\not\geq p_2, and let NN be the normal subgroup of GG generated by p1p21p_1p_2^{-1}. The quotient ordered group is (G/N,P/N)(G/N,P/N).

Positive-relator quotient conjecture.

  1. If (G,P)(G,P) reduces to an amenable group, then (G/N,P/N)(G/N,P/N) reduces to an amenable group.
  2. If (G,P)(G,P) strongly reduces to an amenable group, then (G/N,P/N)(G/N,P/N) strongly reduces to an amenable group.

The conjecture would establish closure of the classes of ordered groups reducing, or strongly reducing, to amenable groups under quotients by positive relators, with potential consequences for further group-theoretic constructions.

Sources & referencesView supporting material

Primary source

Robert Huben, “Gauge-Invariant Uniqueness and Reductions of Ordered Groups”, arXiv:2103.08792 (2021).

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