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On Symmetry of Uniform and Preferential Attachment Graphs

Abstrakt

Motivated by the problem of graph structure compression under realistic source models, we study the symmetry behavior of preferential and uniform attachment graphs. These are two dynamic models of network growth in which new nodes attach to a constant number m of existing ones according to some attachment scheme. We prove symmetry results for m=1 and 2 , and we conjecture that for m≥3 , both models yield asymmetry with high probability. We provide new empirical evidence in terms of graph defect. We also prove that vertex defects in the uniform attachment model grow at most logarithmically with graph size, then use this to prove a weak asymmetry result for all values of m in the uniform attachment model. Finally, we introduce a natural variation of the two models that incorporates preference of new nodes for nodes of a similar age, and we show that the change introduces symmetry for all values of m.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
ELECTRONIC JOURNAL OF COMBINATORICS nr 21, strony 1 - 24,
ISSN: 1077-8926
Język:
angielski
Rok wydania:
2014
Opis bibliograficzny:
Magner A., Janson S., Kollias G., Szpankowski W.: On Symmetry of Uniform and Preferential Attachment Graphs// ELECTRONIC JOURNAL OF COMBINATORICS. -Vol. 21, iss. 3 (2014), s.1-24
Źródła finansowania:
  • COST_FREE
Weryfikacja:
Politechnika Gdańska

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