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This term focuses on rigidity of group actions with some focus on issues that arise out of Zimmer's groundbreaking work in the 1980's. Areas of interest range from local and global rigidity of group actions to special rigidity phenomena in small dimensions to symmetry groups of geometric structures to measure rigidity results for quite general group actions with hyperbolicity. This broad area has seen a very large number of dramatic breakthroughs in recent years.

This thematic month proposes a walk along discrete mathematics and computation theory to explore both a range of mathematical objects (groups, symbolic dynamical systems, words, . . . ) and a range of notions from computer science (information, randomness, computability, complexity,. . . ) that share many strong links.