Search Results for author: Ragnar Thobaben

Found 10 papers, 3 papers with code

More PAC-Bayes bounds: From bounded losses, to losses with general tail behaviors, to anytime-validity

no code implementations21 Jun 2023 Borja Rodríguez-Gálvez, Ragnar Thobaben, Mikael Skoglund

Firstly, for losses with a bounded range, we recover a strengthened version of Catoni's bound that holds uniformly for all parameter values.

valid

Limitations of Information-Theoretic Generalization Bounds for Gradient Descent Methods in Stochastic Convex Optimization

no code implementations27 Dec 2022 Mahdi Haghifam, Borja Rodríguez-Gálvez, Ragnar Thobaben, Mikael Skoglund, Daniel M. Roy, Gintare Karolina Dziugaite

To date, no "information-theoretic" frameworks for reasoning about generalization error have been shown to establish minimax rates for gradient descent in the setting of stochastic convex optimization.

Generalization Bounds

Quadratic Signaling Games with Channel Combining Ratio

no code implementations3 Feb 2021 Serkan Sarıtaş, Photios A. Stavrou, Ragnar Thobaben, Mikael Skoglund

Regarding the Nash equilibrium, we explicitly characterize affine equilibria for the single-stage setup and show that the optimal encoder (resp.

Optimization and Control Information Theory Information Theory

On Random Subset Generalization Error Bounds and the Stochastic Gradient Langevin Dynamics Algorithm

no code implementations21 Oct 2020 Borja Rodríguez-Gálvez, Germán Bassi, Ragnar Thobaben, Mikael Skoglund

In this work, we unify several expected generalization error bounds based on random subsets using the framework developed by Hellstr\"om and Durisi [1].

A Variational Approach to Privacy and Fairness

2 code implementations11 Jun 2020 Borja Rodríguez-Gálvez, Ragnar Thobaben, Mikael Skoglund

In this article, we propose a new variational approach to learn private and/or fair representations.

Fairness Representation Learning

Worst-Case Detection Performance for Distributed SIMO Physical Layer Authentication

no code implementations14 May 2020 Henrik Forssell, Ragnar Thobaben

However, with PLA-aware attack strategies, an attacker can maximize the probability of successfully impersonating the legitimate devices.

Position

The Convex Information Bottleneck Lagrangian

2 code implementations25 Nov 2019 Borja Rodríguez Gálvez, Ragnar Thobaben, Mikael Skoglund

In this paper, we (i) present a general family of Lagrangians which allow for the exploration of the IB curve in all scenarios; (ii) provide the exact one-to-one mapping between the Lagrange multiplier and the desired compression rate $r$ for known IB curve shapes; and (iii) show we can approximately obtain a specific compression level with the convex IB Lagrangian for both known and unknown IB curve shapes.

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