2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71462For a certain class of (nonunital) subalgebras of deformed preprojective algebra of affine type we describe their centers as certain deformation of Kleinian singularity and find their PI-degree. These results can be applied to algebras generated by elements with given spectrum and scalar sum.18 pagesRings and AlgebrasRepresentation Theory16S99 (Primary), 14B07 (Secondary)text