6 papers
Multidimensional Manhattan Preferences
Jiehua Chen, Martin Nöllenburg, Sofia Simola +2
A preference profile (i.e., a collection of linear preference orders of the voters over a set of alternatives) with alternatives and voters is -Manhattan (resp. -Eucl…
Control in Hedonic Games
Jiehua Chen, Jakob Guttmann, Merisa MustajbaÅ¡iÄ +1
We initiate the study of control in hedonic games, where an external actor influences coalition formation by adding or deleting agents. We consider three basic control goals (1) en…
Partitioned Combinatorial Optimization Games
Jiehua Chen, Christian Hatschka, Sofia Simola
We propose a class of cooperative games, called d Partitioned Compbinatorial Optimization Games (PCOGs). The input of PCOG consists of a set of agents and a combinatorial structure…
FPT-Approximability of Stable Matching Problems
Jiehua Chen, Sanjukta Roy, Sofia Simola
We study parameterized approximability of three optimization problems related to stable matching: (1) Min-BP-SMI: Given a stable marriage instance and a number k, find a size-at-le…
Computational Social Choice: Parameterized Complexity and Challenges
Jiehua Chen, Christian Hatschka, Sofia Simola
We survey two key problems-Multi-Winner Determination and Hedonic Games in Computational Social Choice, with a special focus on their parameterized complexity, and propose some res…
Parameterized Complexity of Hedonic Games with Enemy-Oriented Preferences
Martin Durand, Laurin Erlacher, Johanne Müller Vistisen +1
Hedonic games model settings in which a set of agents have to be partitioned into groups which we call coalitions. In the enemy aversion model, each agent has friends and enemies,…