toward wojda's conjecture on digraph packing

;Jerzy Konarski;Andrzej Żak
zhonghua yi xue za zhi 2017 Vol. 37 pp. 589-595
89
konarski2017opusculatoward

Abstract

Given a positive integer \(m\leq n/2\), Wojda conjectured in 1985 that if \(D_1\) and \(D_2\) are digraphs of order \(n\) such that \(|A(D_1)|\leq n-m\) and \(|A(D_2)|\leq 2n-\lfloor n/m\rfloor-1\) then \(D_1\) and \(D_2\) pack. The cases when \(m=1\) or \(m = n/2\) follow from known results. Here we prove the conjecture for \(m\geq\sqrt{8n}+418275\).

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