Ortega, O.

function lemma location axiom location function vertex vertice property proof − ss π profile result condition element satis fies axioms consensus respect location functions square status satis fies tree t characterization number · · · bc ∈ e 2 r π theory l satis fies fi nite trees notice status networks —2012—doi 10.1002/ mcmorri graph vertex z fi nite x ∈ x p p −i corollary vertex x center function consensus function |π ab | consensus theory m ean file π ab ∈ e network square 2 p p mathematics location function l choice fi rst mulder vs −1 center finition ≤ ss π vertex b choice theory path p holzman vohra 1 y 2 k i =1 x ∈ π lemma 8 length 2 xabc satis fied 10.1002/ file α —2012—doi ss π y x ∈ v ∈πabc xi ∈π ab yi ∈α ab case p