N. Ruškuc

activity

20092026

most citedMaximal subgroups of free idempotent generated semigroups over the full transformation monoid

35 citations · 42 across the 18 of their papers we have counts for

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Showing 2025Show all

3 papers · 1 filter

math.GR2025

Maximal subgroups of free projection- and idempotent-generated semigroups with applications to partition monoids

James East, Robert D. Gray, P. A. Azeef Muhammed +1

This paper investigates the maximal subgroups of a free projection-generated regular $*$ -semigroup $P G (P)$ over a projection algebra $P$ , and their relationship to the maximal subg…

math.GR2025

Twisted products of monoids

James East, Robert D. Gray, P. A. Azeef Muhammed +1

A twisting of a monoid $S$ is a map $Φ : S \times S \to N$ satisfying the identity $Φ (a, b) + Φ (ab, c) = Φ (a, b c) + Φ (b, c)$ . Together with an additive commutative monoid $M$ , and…

math.RA2025★ 1 cited

Semigroup Congruences and Subsemigroups of the Direct Square

Callum Barber, Nik Ruškuc

We investigate semigroups $S$ which have the property that every subsemigroup of $S \times S$ which contains the diagonal ${(s, s) : s \in S}$ is necessarily a congruence on $S…