output
20032026
most citedComplex organic molecules in protoplanetary disks

256 citations

Showing math.GRShow all

7 papers · 1 filter

math.GR2026

Cross varieties of aperiodic monoids

Sergey V. Gusev

A variety of universal algebras is called Cross if it is finitely based, finitely generated, and has only finitely many subvarieties. A monoid is aperiodic if all its subgroups are…

math.GR20261 cited

Characterization of Cross varieties of -trivial monoids

Sergey V. Gusev, Edmond W. H. Lee, Wen Ting Zhang

A finitely based, finitely generated variety with finitely many subvarieties is a Cross variety. In the present article, it is shown that a variety of -trivial monoids is Cross…

math.GR2025

Modular elements in the lattice of monoid varieties

Sergey V. Gusev

An element of a lattice is modular if has no five-element sublattice isomorphic to the pentagon in which would correspond to the lonely midpoint. In the present wor…

math.GR2025

Identity bases for finite cyclic semigroups

Mikhail V. Volkov

We provide explicit identity bases for finite cyclic semigroups.

math.GR20241 cited

Small monoids generating varieties with uncountably many subvarieties

Sergey V. Gusev

An algebra that generates a variety with uncountably many subvarieties is said to be of type . We show that the Rees quotient monoid of order ten is of type…

math.GR2015

Upper-modular and related elements of the lattice of commutative semigroup varieties

B. M. Vernikov

We completely determine upper-modular, codistributive and costandard elements in the lattice of all commutative semigroup varieties. In particular, we prove that the properties of…