Ergodic Theorems for Group Actions

1: Means and averageable functions.- 2: Ergodicity and mixing.- 3: Averaging sequences. Universal ergodic theorems.- 4: Mean ergodic theorems.- 5: Maximal and dominated ergodic theorems.- 6: Pointwise ergodic theorems.- 7: Ergodic theorems for homogeneous random measures.- 8: Specific informational and thermodynamical characteristics of homogeneous random fields.- § 1. Groups and semigroups.- § 2. Homogeneous and group-type homogeneous spaces.- § 3. Amenable semigroups and ergodic nets.- § 4. Positive definite functions.- § 5. Representations of semigroups in Banach spaces.- § 6. Weakly almost periodic elements and functions.- § 7. Dynamical systems.- § 8. Homogeneous random functions.- § 9. Measurability and continuity of representations, dynamical systems and homogeneous random fields.- § 12. The Banach convergence principle.- § 13. Directions and nets.- § 14. Correspondence between “left” and “right” objects and conditions.- References.