Temat: 2-factor - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The structure and existence of 2-factors in iterated line graphs
Autorzy:: Ferrara, Michael
Gould, Ronald
Hartke, Stephen
Powiązania:: https://bibliotekanauki.pl/articles/743426.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: line graph
2-factor
iterated line graph
cycle
Opis:: We prove several results about the structure of 2-factors in iterated line graphs. Specifically, we give degree conditions on G that ensure L²(G) contains a 2-factor with every possible number of cycles, and we give a sufficient condition for the existence of a 2-factor in L²(G) with all cycle lengths specified. We also give a characterization of the graphs G where $L^k(G)$ contains a 2-factor.
Źródło:: Discussiones Mathematicae Graph Theory; 2007, 27, 3; 507-526
2083-5892
Pojawia się w:: Discussiones Mathematicae Graph Theory
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The Chvátal-Erdős condition and 2-factors with a specified number of components
Autorzy:: Chen, Guantao
Gould, Ronald
Kawarabayashi, Ken-ichi
Ota, Katsuhiro
Saito, Akira
Schiermeyer, Ingo
Powiązania:: https://bibliotekanauki.pl/articles/743407.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: Chvátal-Erdös condition
2-factor
hamiltonian cycle
Ramsey number
Opis:: Let G be a 2-connected graph of order n satisfying α(G) = a ≤ κ(G), where α(G) and κ(G) are the independence number and the connectivity of G, respectively, and let r(m,n) denote the Ramsey number. The well-known Chvátal-Erdös Theorem states that G has a hamiltonian cycle. In this paper, we extend this theorem, and prove that G has a 2-factor with a specified number of components if n is sufficiently large. More precisely, we prove that (1) if n ≥ k·r(a+4, a+1), then G has a 2-factor with k components, and (2) if n ≥ r(2a+3, a+1)+3(k-1), then G has a 2-factor with k components such that all components but one have order three.
Źródło:: Discussiones Mathematicae Graph Theory; 2007, 27, 3; 401-407
2083-5892
Pojawia się w:: Discussiones Mathematicae Graph Theory
Dostawca treści:: Biblioteka Nauki

Artykuł

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