Search Results for author: Lorenzo Beretta

Found 2 papers, 1 papers with code

Multi-Swap $k$-Means++

no code implementations28 Sep 2023 Lorenzo Beretta, Vincent Cohen-Addad, Silvio Lattanzi, Nikos Parotsidis

The $k$-means++ algorithm of Arthur and Vassilvitskii (SODA 2007) is often the practitioners' choice algorithm for optimizing the popular $k$-means clustering objective and is known to give an $O(\log k)$-approximation in expectation.

Clustering

An Optimal Algorithm for Finding Champions in Tournament Graphs

1 code implementation26 Nov 2021 Lorenzo Beretta, Franco Maria Nardini, Roberto Trani, Rossano Venturini

In this paper, we address the problem of finding a champion of the tournament, also known as Copeland winner, which is a player that wins the highest number of matches.

Conversational Search Information Retrieval +4

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