Non-commutative resolutions and Grothendieck groups
  Let $R$ be a noetherian normal domain. We investigate when $R$ admits a faithful module whose endomorphism ring has finite global dimension. This can be viewed as a non-commutative desingularization of $\Spec(R)$. We show that the existence of such modules forces stringent conditions on the Grothendieck group of finitely generated modules over $R$. In some cases those conditions are enough to imply that $\Spec(R)$ has only rational singularities. 
Hailong Dao, Osamu Iyama, Ryo Takahashi and Charles Vial
math.AC math.AG math.RA