Universal deformation rings need not be complete intersections

Bleher, Frauke M.; Chinburg, Ted

Comptes Rendus. Mathématique, Volume 342 (2006) p. 229-232

Deformations and derived categories

Bleher, Frauke M.; Chinburg, Ted

Comptes Rendus. Mathématique, Volume 334 (2002) p. 97-100