What is Cost?

Damien Gaboriau (1)

1 UMPA-ENSL - Unité de Mathématiques Pures et Appliquées

Two-page paper on the notion of cost of groups and measured equivalence relations to appear in the "What is?" series in the Notices of the AMS.

Keywords: cost; measured group theory; measured equivalence relations; von Neumann algebras

Domains: Mathematics [math]; Group Theory [math.GR]; Mathematics [math]; Dynamical Systems [math.DS]

Damien Gaboriau. What is Cost?. Notices of the American Mathematical Society, 2010, 57 (10), pp.1295-1296. ⟨ensl-00534141⟩