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Span of a graph [Elektronski vir] : keeping the safety distanceBanič, Iztok ; Taranenko, AndrejInspired by Lelek's idea from [Disjoint mappings and the span of spaces, Fund. Math. 55 (1964), 199 -- 214], we introduce the novel notion of the span of graphs. Using this, we solve the problem of ... determining the \emph{maximal safety distance} two players can keep at all times while traversing a graph. Moreover, their moves must be made with respect to certain move rules. For this purpose, we introduce different variants of a span of a given connected graph. All the variants model the maximum safety distance kept by two players in a graph traversal, where the players may only move with accordance to a specific set of rules, and their goal: visit either all vertices, or all edges. For each variant, we show that the solution can be obtained by considering only connected subgraphs of a graph product and the projections to the factors. We characterise graphs in which it is impossible to keep a positive safety distance at all moments in time. Finally, we present a polynomial time algorithm that determines the chosen span variant of a given graph.Source: Discrete mathematics & theoretical computer science [Elektronski vir]. - ISSN 1365-8050 (Vol. 25, no. 1, 2023, 19 str.)Type of material - e-article ; adult, seriousPublish date - 2023Language - englishCOBISS.SI-ID - 148408835
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Author | Banič, Iztok ; Taranenko, Andrej |
Title | Span of a graph [Elektronski vir] : keeping the safety distance |
Publication date | 2023-03-01 |
COBISS.SI-ID | 148408835 |
Publication version in repository | Unidentified |
Publication licence | Creative Commons Attribution 4.0 International |
Embargo | Unidentified |
Project(s) from which the publication was funded
Title | Acronym | Project ID | Funder |
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Teorija grafov | P1-0297-2022 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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Sodobni in novi metrični koncepti v teoriji grafov | J1-1693-2019 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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Algebra, diskretna matematika, verjetnostni račun in teorija iger | P1-0285-2022 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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Banič, Iztok | 23201 |
Taranenko, Andrej | 21821 |
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