Search Results for author: Daniil Ryabko

Found 19 papers, 0 papers with code

Beauty beacon: correlated strategies for the Fisher runaway process

no code implementations26 Sep 2023 Daniil Ryabko, Angustias Vaca, Prudencio Pazoca

Moreover, after being established in the population, it can sustain costs of over 35\% .

Universal time-series forecasting with mixture predictors

no code implementations1 Oct 2020 Daniil Ryabko

The main subject of this book are such mixture predictors, and the main results demonstrate the universality of this method in a very general probabilistic setting, but also show some of its limitations.

Time Series Time Series Forecasting

Clustering piecewise stationary processes

no code implementations26 Jun 2019 Azadeh Khaleghi, Daniil Ryabko

The problem of time-series clustering is considered in the case where each data-point is a sample generated by a piecewise stationary ergodic process.

Clustering Time Series +1

Asymptotic nonparametric statistical analysis of stationary time series

no code implementations30 Mar 2019 Daniil Ryabko

It is thus a rather attractive assumption to base statistical analysis on, especially for problems for which less general qualitative assumptions, such as independence or finite memory, clearly fail.

Clustering Time Series +1

Finite-time optimality of Bayesian predictors

no code implementations20 Dec 2018 Daniil Ryabko

The problem of sequential probability forecasting is considered in the most general setting: a model set C is given, and it is required to predict as well as possible if any of the measures (environments) in C is chosen to generate the data.

Hypotheses testing on infinite random graphs

no code implementations10 Aug 2017 Daniil Ryabko

Drawing on some recent results that provide the formalism necessary to definite stationarity for infinite random graphs, this paper initiates the study of statistical and learning questions pertaining to these objects.

Time Series Time Series Analysis

Independence clustering (without a matrix)

no code implementations NeurIPS 2017 Daniil Ryabko

The independence clustering problem is considered in the following formulation: given a set $S$ of random variables, it is required to find the finest partitioning $\{U_1,\dots, U_k\}$ of $S$ into clusters such that the clusters $U_1,\dots, U_k$ are mutually independent.

Clustering Time Series +1

Universality of Bayesian mixture predictors

no code implementations26 Oct 2016 Daniil Ryabko

In this work it is shown that the minimax asymptotic performance is always attainable, and it is attained by a convex combination of a countably many measures from the set C (a Bayesian mixture).

Time Series Time Series Analysis

Things Bayes can't do

no code implementations26 Oct 2016 Daniil Ryabko

In such a case, if there is a predictor that achieves asymptotically vanishing error for any measure in C, then there is a Bayesian predictor that also has this property, and whose prior is concentrated on (a countable subset of) C.

Characterizing predictable classes of processes

no code implementations9 Aug 2014 Daniil Ryabko

A sequence x1,..., xn,... of discrete-valued observations is generated according to some unknown probabilistic law (measure) mu.

Selecting Near-Optimal Approximate State Representations in Reinforcement Learning

no code implementations12 May 2014 Ronald Ortner, Odalric-Ambrym Maillard, Daniil Ryabko

We consider a reinforcement learning setting introduced in (Maillard et al., NIPS 2011) where the learner does not have explicit access to the states of the underlying Markov decision process (MDP).

reinforcement-learning Reinforcement Learning (RL)

Unsupervised model-free representation learning

no code implementations17 Apr 2013 Daniil Ryabko

Numerous control and learning problems face the situation where sequences of high-dimensional highly dependent data are available but no or little feedback is provided to the learner, which makes any inference rather challenging.

Representation Learning Time Series +1

Reducing statistical time-series problems to binary classification

no code implementations NeurIPS 2012 Daniil Ryabko, Jérémie Mary

The algorithms that we construct for solving these problems are based on a new metric between time-series distributions, which can be evaluated using binary classification methods.

Binary Classification Classification +4

Multiple Change Point Estimation in Stationary Ergodic Time Series

no code implementations7 Mar 2012 Azadeh Khaleghi, Daniil Ryabko

Given a heterogeneous time-series sample, the objective is to find points in time (called change points) where the probability distribution generating the data has changed.

Time Series Time Series Analysis

Selecting the State-Representation in Reinforcement Learning

no code implementations NeurIPS 2011 Odalric-Ambrym Maillard, Daniil Ryabko, Rémi Munos

Without knowing neither which of the models is the correct one, nor what are the probabilistic characteristics of the resulting MDP, it is required to obtain as much reward as the optimal policy for the correct model (or for the best of the correct models, if there are several).

reinforcement-learning Reinforcement Learning (RL)

On the Relation between Realizable and Nonrealizable Cases of the Sequence Prediction Problem

no code implementations31 May 2010 Daniil Ryabko

For some of the formalizations we also show that when a solution exists, it can be obtained as a Bayes mixture over a countable subset of $\mathcal C$.

Relation

Clustering processes

no code implementations5 May 2010 Daniil Ryabko

We show that, for the case of a known number of clusters, consistency can be achieved under the only assumption that the joint distribution of the data is stationary ergodic (no parametric or Markovian assumptions, no assumptions of independence, neither between nor within the samples).

Clustering

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