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Paired domination stability in graphsGorzkowska, Aleksandra ...Množica ▫$S$▫ vozlišč grafa ▫$G$▫ je parna dominacijska množica, če je vsako vozlišče grafa ▫$G$▫ sosedno nekemu vozlišču iz množice ▫$S$▫ in če podgraf, induciran z množico ▫$S$▫, vsebuje popolno ... prirejanje (ne nujno kot induciran podgraf). Parno dominacijsko število, ▫$\gamma_{\mathrm{pr}} (G)$▫, grafa ▫$G$▫ je minimalna moč parne dominacijske množice grafa ▫$G$▫. Množica vozlišč, katerih odstranitev iz ▫$G$▫ nam da graf brez izoliranih vozlišč, se imenuje neizolativna množica. Minimalna moč neizolativne množice vozlišč, katerih odstranitev zmanjša parno dominacijsko število, je ▫$\gamma_{\mathrm{pr}}^-$▫-stabilnost grafa ▫$G$▫, označena z ▫$\mathrm{st}_{\gamma_{\mathrm{pr}}}^- (G)$▫. Stabilnost parne dominacije grafa ▫$G$▫ je minimalna moč neizolativne množice vozlišč iz ▫$G$▫, katerih odstranitev spremeni parno dominacijsko število. Določimo lastnosti stabilnosti parne dominacije v grafih. Dokažemo: če je ▫$G$▫ povezan graf in je ▫$\gamma_{\mathrm{pr}} (G) \geq 4$▫, potem je ▫$\mathrm{st}_{\gamma_{\mathrm{pr}}}^- (G) \leq 2\Delta (G)$▫, kjer je ▫$\Delta (G)$▫ maksimalna stopnja vozlišč v grafu ▫$G$▫; karakteriziramo tudi neskončno družino dreves, za katere v tej zgornji meji velja enakost.Source: Ars mathematica contemporanea. - ISSN 1855-3966 (Vol. 22, no. 2, 2022, #P2.04 (str. 231-248))Type of material - article, component part ; adult, seriousPublish date - 2022Language - englishCOBISS.SI-ID - 116313603
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source: Ars mathematica contemporanea. - ISSN 1855-3966 (Vol. 22, no. 2, 2022, #P2.04 (str. 231-248))
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Gorzkowska, Aleksandra | ![]() |
Henning, Michael A. | ![]() |
Pilśniak, Monika | ![]() |
Tumidajewicz, Elżbieta | ![]() |
Source: Personal bibliographies
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