3 citations · 16 across the 47 of their papers we have counts for
4 papers · 1 filter
Learning a Ranking from Human Feedback in Log-Concave Random Utility Models
Diego Alovisetti, Marco Mussi, Alberto Maria Metelli
We study the problem of recovering the ranking of a fixed set of items according to their unknown numerical utilities. At each interaction with the environment, a learner presents…
Sample complexity of variance-reduced policy gradient: weaker assumptions and lower bounds
Gabor Paczolay, Matteo Papini, Alberto Maria Metelli +2
Several variance-reduced versions of REINFORCE based on importance sampling achieve an improved sample complexity to find an -stationary point, under an unrealistic…
Parameter-Free Heavy-Tailed Bandits
Gianmarco Genalti, Alberto Maria Metelli
Heavy-tailed distributions arise naturally in sequential decision-making problems such as financial investment, online advertising, and network management, where rare but extreme o…
Actor-Critic with Active Importance Sampling
Majid Molaei, Gabor Paczolay, Matteo Papini +2
This paper introduces the Active-Importance-Sampling Actor-Critic (AISAC) algorithm, an extension of the Actor-Critic framework for reducing variance in policy gradient estimation.…