Cohn path algebras have Invariant Basis Number
arXiv:1303.2122 · doi:10.1080/00927872.2014.982812
Abstract
For any finite directed graph and any field we show that the Cohn path algebra has the Invariant Basis Number property.
11 pages; updated October 2013; some minor style changes from original March 2013 version; new observation that Cohn path algebras have Invariant Matrix Number as well