Search Results for author: Marc Jourdan

Found 7 papers, 2 papers with code

An Anytime Algorithm for Good Arm Identification

no code implementations16 Oct 2023 Marc Jourdan, Clémence Réda

Second, when APGAI is combined with a stopping rule, we prove upper bounds on the expected sampling complexity, holding at any confidence level.

Dealing with Unknown Variances in Best-Arm Identification

no code implementations3 Oct 2022 Marc Jourdan, Rémy Degenne, Emilie Kaufmann

The problem of identifying the best arm among a collection of items having Gaussian rewards distribution is well understood when the variances are known.

Top Two Algorithms Revisited

no code implementations13 Jun 2022 Marc Jourdan, Rémy Degenne, Dorian Baudry, Rianne de Heide, Emilie Kaufmann

Top Two algorithms arose as an adaptation of Thompson sampling to best arm identification in multi-armed bandit models (Russo, 2016), for parametric families of arms.

Thompson Sampling Vocal Bursts Valence Prediction

Choosing Answers in $\varepsilon$-Best-Answer Identification for Linear Bandits

no code implementations9 Jun 2022 Marc Jourdan, Rémy Degenne

In pure-exploration problems, information is gathered sequentially to answer a question on the stochastic environment.

Efficient Pure Exploration for Combinatorial Bandits with Semi-Bandit Feedback

no code implementations21 Jan 2021 Marc Jourdan, Mojmír Mutný, Johannes Kirschner, Andreas Krause

Combinatorial bandits with semi-bandit feedback generalize multi-armed bandits, where the agent chooses sets of arms and observes a noisy reward for each arm contained in the chosen set.

Multi-Armed Bandits

A Probabilistic Model of the Bitcoin Blockchain

1 code implementation7 Nov 2018 Marc Jourdan, Sebastien Blandin, Laura Wynter, Pralhad Deshpande

The Bitcoin transaction graph is a public data structure organized as transactions between addresses, each associated with a logical entity.

Decision Making Under Uncertainty

Characterizing Entities in the Bitcoin Blockchain

1 code implementation29 Oct 2018 Marc Jourdan, Sebastien Blandin, Laura Wynter, Pralhad Deshpande

Bitcoin has created a new exchange paradigm within which financial transactions can be trusted without an intermediary.

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