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Computability of probability measures and Martin-Lof randomness over metric spaces

TLDR
This paper shows that any computable metric space with a computable probability measure is isomorphic to the Cantor space in a computables and measure-theoretic sense and admits a universal uniform randomness test.
Abstract
In this paper we investigate algorithmic randomness on more general spaces than the Cantor space, namely computable metric spaces. To do this, we first develop a unified framework allowing computations with probability measures. We show that any computable metric space with a computable probability measure is isomorphic to the Cantor space in a computable and measure-theoretic sense. We show that any computable metric space admits a universal uniform randomness test (without further assumption).

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Citations
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Book ChapterDOI

Computability and analysis: the legacy of Alan Turing

TL;DR: The theory of probability, which was born in an exchange of letters between Blaise Pascal and Pierre de Fermat in 1654 and developed further by Christian Huygens and Jakob Bernoulli, provided methods for calculating odds related to games of chance.
Journal ArticleDOI

Probabilistic computability and choice

TL;DR: This work introduces the concept of a Las Vegas computable multi-valued function, which is a function that can be computed on a probabilistic Turing machine that receives a random binary sequence as auxiliary input and proves an Independent Choice Theorem that implies that Las Vegas Computable functions are closed under composition.
Proceedings ArticleDOI

Noncomputable Conditional Distributions

TL;DR: It is shown that in general one cannot compute conditional probabilities, so a pair of computable random variables are constructed in the unit interval whose conditional distribution P[Y|X] encodes the halting problem.
Journal ArticleDOI

Randomness and Differentiability

TL;DR: The authors showed that a real number z in [0, 1] is weakly 2-random if and only if each almost everywhere differentiable computable function of bounded variation is differentiable at z.
Dissertation

Computability, inference and modeling in probabilistic programming

TL;DR: A new construction of the Mondrian process is presented as a partition-valued Markov process in continuous time, which can be viewed as placing a distribution on an infinite kd-tree data structure.
References
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Book

Convergence of Probability Measures

TL;DR: Weak Convergence in Metric Spaces as discussed by the authors is one of the most common modes of convergence in metric spaces, and it can be seen as a form of weak convergence in metric space.
Book ChapterDOI

Convergence of probability measures

TL;DR: Weakconvergence methods in metric spaces were studied in this article, with applications sufficient to show their power and utility, and the results of the first three chapters are used in Chapter 4 to derive a variety of limit theorems for dependent sequences of random variables.
Book

Gradient Flows: In Metric Spaces and in the Space of Probability Measures

TL;DR: In this article, Gradient flows and curves of Maximal slopes of the Wasserstein distance along geodesics are used to measure the optimal transportation problem in the space of probability measures.
Book

Computable Analysis : An Introduction

TL;DR: This book provides a solid fundament for studying various aspects of computability and complexity in analysis and is written in a style suitable for graduate-level and senior students in computer science and mathematics.
Journal ArticleDOI

The definition of random sequences

TL;DR: It is shown that the random elements as defined by Kolmogorov possess all conceivable statistical properties of randomness and can equivalently be considered as the elements which withstand a certain universal stochasticity test.
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