The category of maximal Cohen--Macaulay modules as a ring with several   objects
  Over a commutative local Cohen--Macaulay ring, we view and study the category of maximal Cohen--Macaulay modules as a ring with several objects. We compute the global dimension of this category and thereby extend a result of Leuschke to the case where the ring has arbitrary (as opposed to finite) CM-type. 
Henrik Holm
math.AC