The Parafree Conjecture for associative algebras
arXiv:2608.20570
Abstract
For every base field, we construct a finitely generated parafree augmented associative algebra with countably infinite-dimensional second homology. This disproves the analogue of the Parafree Conjecture for associative algebras and answers a question of Ivanov and Lopatkin. Our example is the monoid algebra of a finitely generated but not finitely presented submonoid of a free monoid.
12 pages