arXiv:2608.29308v1 Announce Type: cross
Abstract: In metric social choice, each voter ranks a set of $m$ candidates by her distance to them in an unknown metric space. The cost of a candidate is its...
By Nisarg Shah
arXiv:2604.19851v2 Announce Type: replace-cross
Abstract: Computational social choice studies how conflicting individual preferences are aggregated into a collective decision, with applications to el...
By Itai Zilberstein, Ruben Martins, Ratip Emin Berker
The paper investigates the outer diversity of Condorcet domains, which are sets of rankings ensuring a transitive majority relation for elections with an odd number of votes from the domain. It defines outer diversity as the expected swap distance from a random vote to the nearest domain vote and provides numerical analyses for maximal domains with few candidates. The authors also derive asymptotic behaviors for several special domains, yielding theoretical insights into this measure.
By Piotr Faliszewski, Jan Jabrocki, Mateusz S{\l}uszniak, Krzysztof Sornat, Stanis{\l}aw Szufa, Tomasz W\k{a}s
The paper studies how to predict the winner of a district‑based election using as few queries to individual votes as possible. It introduces an adaptive randomized algorithm that, for any number of candidates and any error tolerance, correctly predicts the overall winner with probability at least 1‑δ using ≥O(1/ε² log m/δ log 1/δ) queries. This improves previous results for two candidates and balanced districts, and nearly matches a proven lower bound for constant‑size candidate sets.
By Koustav De, Debajyoti Kar, Swagato Sanyal
arXiv:2610.31948v1 Announce Type: new
Abstract: Reporting the best of $M$ noisy, unbiased scores overstates the winner's value by up to $c\sqrt{V}$, where $V$ is the total noise variance and the shar...
By Ivan Viakhirev, Kirill Borodin, Grach Mkrtchian
The paper introduces a derandomization framework for stochastic majority vote classifiers, converting PAC‑Bayesian guarantees into deterministic majority vote guarantees. By applying disintegrated PAC‑Bayesian theory to the space of vote weight vectors, the authors derive two families of high‑probability generalization bounds for both data‑independent and data‑dependent ensembles. These bounds naturally lead to a self‑bounding learning algorithm that optimizes deterministic majority vote performance.
By Julien Bastian (LabHC), Benjamin Leblanc (LabHC, UJM, MALICE), Pascal Germain (LabHC, UJM, MALICE), Amaury Habrard (LabHC, UJM, MALICE), Guillaume Metzler (ERIC), Emilie Morvant (LabHC), Paul Viallard (MALT)