See also:

• Science: Math: Research: Open Problems  (5)

• The Furstenburg Conjecture and Rigidity - If two commuting endomorphisms of a torus are incommensurable (no power of one is a power of the other), then their joint action should be rigid. Some of the conjectures and open problems compiled by the AIM.
• Open Problems in Dynamical Systems - A collection of papers outlining unsolved problems maintained at Stony Brook.
• Open Problems in Dynamical Systems and Ergodic Theory - Originally from the Katsiveli 2000 Open Problems Session, now maintained by Sergiy Kolyada. PDF-PS.