Főoldal  |  Hírek  |  Megjelent Schlotter Ildikó cikke a Mathematical Programming tudományos folyóiratban

Megjelent Schlotter Ildikó cikke a Mathematical Programming tudományos folyóiratban

Hírek

Popular branchings and their dual certificates

Abstract

Let G be a digraph where every node has preferences over its incoming edges. The preferences of a node extend naturally to preferences over branchings, i.e., directed forests; a branching B is popular if B does not lose a head-to-head election (where nodes cast votes) against any branching. Such popular branchings have a natural application in liquid democracy. The popular branching problem is to decide if G admits a popular branching or not. We give a characterization of popular branchings in terms of dual certificates and use this characterization to design an efficient combinatorial algorithm for the popular branching problem. When preferences are weak rankings, we use our characterization to formulate the popular branching polytope in the original space and also show that our algorithm can be modified to compute a branching with least unpopularity margin. When preferences are strict rankings, we show that “approximately popular” branchings always exist.

⇒Tovább a teljes cikkre

Felhasználási feltételek
Impresszum
Intézményünk országos ésnemzetközi hálózati kapcsolatátaz NIIF program biztosítja
Közgazdaság- és Regionális Tudományi Kutatóközpont Közgazdaság-tudományi Intézet
© Copyright 2020. Minden jog fenntartva.