Randomness on computable probability spaces - A dynamical point of view
Files
Accepted manuscript
Date
2009
DOI
Authors
Gács, Peter
Hoyrup, Mathieu
Rojas, Cristobal
Version
OA Version
Citation
Péter Gács, Mathieu Hoyrup, Cristobal Rojas. 2009. "Randomness on Computable Probability Spaces - A Dynamical Point of View.." Symposium on Theoretical Aspects of Computer Science 2009 (
Freiburg), pp. 469–480.
Abstract
We extend the notion of randomness (in the version introduced by Schnorr) to computable probability spaces and compare it to a dynamical notion of randomness: typicality. Roughly, a point is typical for some dynamic, if it follows the statistical behavior of the system (Birkhoff’s pointwise ergodic theorem). We prove that a point is Schnorr random if and only if it is typical for every mixing computable dynamics. To prove the result we develop some tools for the theory of computable probability spaces (for example, morphisms) that are expected to have other applications.