Year: 2026
Type: preprint
Abstract: We construct a finitely generated parafree Lie ring with nonzero second homology and, over every nonzero commutative ring, a finitely generated parafree augmented associative algebra with nonzero second homology. These examples disprove the analogues of the Parafree Conjecture for Lie rings and for augmented associative algebras. Our constructions also provide finitely generated parafree examples that are not finitely presented, both in the Lie-ring and augmented-algebra settings.
Source: arXiv (Cornell University)
Authors: Ionin, Vasily, Mikhailov, Roman
Language: English
Topic: Advanced Topics in Algebra
Subfield: Algebra and Number Theory
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7204116709