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Shellings from relative shellings
Russell Stephen Woodroofe, Andrés Santamaría-Galvis, 2021, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: shelling, relative simplicial complex, NP-completeness
Objavljeno v RUP: 26.10.2021; Ogledov: 862; Prenosov: 25
.pdf Celotno besedilo (6,70 MB)
Gradivo ima več datotek! Več...

3.
Vertex cover at distance on H-free graphs
Clément Jean Dallard, Mirza Krbezlija, Martin Milanič, 2021, objavljeni znanstveni prispevek na konferenci

Ključne besede: distance-k vertex cover, H-free graph, np-completeness, polynomial-time algorithm, dichotomy
Objavljeno v RUP: 16.07.2021; Ogledov: 1259; Prenosov: 30
URL Povezava na celotno besedilo

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A note on domination and independence-domination numbers of graphs
Martin Milanič, 2013, objavljeni znanstveni prispevek na konferenci

Opis: Vizing's conjecture is true for graphs ▫$G$▫ satisfying ▫$\gamma^i(G) = \gamma(G)$▫, where ▫$\gamma(G)$▫ is the domination number of a graph ▫$G$▫ and ▫$\gamma^i(G)$▫ is the independence-domination number of ▫$G$▫, that is, the maximum, over all independent sets ▫$I$▫ in ▫$G$▫, of the minimum number of vertices needed to dominate ▫$I$▫. The equality ▫$\gamma^i(G) = \gamma(G)$▫ is known to hold for all chordal graphs and for chordless cycles of length ▫$0 \pmod{3}$▫. We prove some results related to graphs for which the above equality holds. More specifically, we show that the problems of determining whether ▫$\gamma^i(G) = \gamma(G) = 2$▫ and of verifying whether ▫$\gamma^i(G) \ge 2$▫ are NP-complete, even if ▫$G$▫ is weakly chordal. We also initiate the study of the equality ▫$\gamma^i = \gamma$▫ in the context of hereditary graph classes and exhibit two infinite families of graphs for which ▫$\gamma^i < \gamma$▫.
Ključne besede: Vizing's conjecture, domination number, independence-domination number, weakly chordal graph, NP-completeness, hereditary graph class, IDD-perfect graph
Objavljeno v RUP: 15.10.2013; Ogledov: 2987; Prenosov: 128
.pdf Celotno besedilo (300,57 KB)

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