Periodicity in representation theory of algebras (A. Skowronski) ---------------------------------------------------------------- Lecture 1: Selfinjective algebras. Classical characterizations and examples of selfinjective, Frobenius and symmetric algebras. Lecture 2: Periodicity of modules and algebras. The syzygy periodic modules and their Ext-algebras, the bimodule periodic algebras and their Hochschild cohomology algebras. Lecture 3: Periodicity of finite groups. Characterizations of periodic and p-periodic finite groups, Zassenhaus problem, free actions of finite groups on spheres. Lecture 4: Periodicity of tame symmetric algebras. Classification of the tame symmetric algebras with all indecomposable nonprojective finite dimensional modules periodic (symmetric algebras of Dynkin type, symmetric algebras of tubular type, symmetric algebras of quaternion type). Lecture 5: Periodicity and hypersurface singularities. Hypersurface singularities of finite Cohen-Macaulay type, periodicity of their stable Auslander algebras (the preprojective algebras and the twisted preprojective algebras of Dynkin type).