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A Note on Linear Discrepancy and Bandwidth

Dieter Rautenbach1
1Forschungsinstitut fir Diskrete Mathematik Lennéstr. 2, D-53113 Bonn, Germany

Abstract

Fishburn, Tanenbaum, and Trenk define the linear discrepancy \(\text{Id}(P)\) of a poset \( P = (V, <_P) \) as the minimum integer \( k \geq 0 \) for which there exists a bijection \( f : V \rightarrow \{1,2,\ldots,|V|\} \) such that \( u <_P v \) implies \( f(u) < f(v) \) and \( u ||_P v \) implies \( |f(u) – f(v)| \leq k \). In their work, they prove that the linear discrepancy of a poset equals the bandwidth of its cocomparability graph. Here we provide partial solutions to some problems formulated in their study about the linear discrepancy and the bandwidth of cocomparability graphs.

Keywords: Poset; cocomparability graph; linear discrepancy; bandwidth AMS subject classification. 05C78; 06A06