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A duality theorem for graph embeddingsJackson, Brad ; Parsons, Torrence Douglas ; Pisanski, TomažV članku je posplošen pojem krovnega grafa. Definirani so krovi z vrtinci. Če sta grafa ▫$K$▫ in ▫$L$▫ dualno zložena v orientabilno sklenjeno ploskev ▫$S$▫, lahko dvignemo ti dve vložitvi do ... vložitev dualnih grafov ▫$\widetilde{K}$▫ in ▫$\widetilde{L}$▫ v orientabilno ploskev ▫$\widetilde{S}$▫, tako, da je ▫$\widetilde{S}$▫ krov z razvejišči nad ▫$S$▫ in da sta restrikciji krovne projekcije na ▫$\widetilde{K}$▫ in ▫$\widetilde{L}$▫ krova z vrtinci. Ta teorija omogoča poiskati rod kompozicije ▫$G[nK_1]$▫ iz ustrezne vložitve "kvocientnega" grafa ▫$G$▫.Source: Journal of graph theory. - ISSN 0364-9024 (Let. 5, 1981, str. 55-77)Type of material - article, component partPublish date - 1981Language - englishCOBISS.SI-ID - 8253017
Author
Jackson, Brad |
Parsons, Torrence Douglas |
Pisanski, Tomaž
Topics
matematika |
kombinatorika |
teorija grafov |
topološka teorija grafov |
krovi |
vložitve grafov |
mathematics |
combinatorics |
graph theory |
covering spaces |
embeddings |
graph covering
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Parsons, Torrence Douglas | 04633 |
Pisanski, Tomaž | 01941 |
Source: Personal bibliographies
and: SICRIS
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