The Journal of Symbolic Logic

Research Article

On generically stable types in dependent theories

Alexander Usvyatsov

University of California – Los Angeles, Mathematics Department, Box 951555, Los Angeles, CA 90095-1555, USA, URL:

Universidade de Lisboa, CMAF, AV Prof. Gama Pinto, 2 1649-003 Lisboa, Portugal


We develop the theory of generically stable types, independence relation based on nonforking and stable weight in the context of dependent theories.

(Received October 06 2007)