2 papers
cs.GT2026
Existence of the Core in Approval-Based Committee Elections
Patrick Becker, Matthias Greger, Dominik Peters
We settle the main open question in the theory of approval-based multi-winner elections: we show that there always exists a committee in the core. The core is a stability and group…
cs.GT2026
Core Existence in Approval-Based Committee Elections with up to Seven Voter Types
Patrick Becker, Matthias Greger, Dominik Peters
In an approval-based committee election, the task is to select a committee of up to candidates from a set of candidates based on the preferences of voters, each of whom…