DM 2007 | Sciweavers

15

DM
2007

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Lower connectivities of regular graphs with small diameter

13 years 4 months ago

Krishnamoorthy, Thulasiraman and Swamy [Minimum order graphs with speciﬁed diameter, connectivity and regularity, Networks 19 (1989) 25–46] showed that a δ-regular graph with...

Camino Balbuena, Xavier Marcote

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12

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DM
2007

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The topology of spaces of phylogenetic trees with symmetry

13 years 4 months ago

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Natural Dowling analogues of the complex of phylogenetic trees are studied. Using discrete Morse theory, we ﬁnd their homotopy types. In the process, the homotopy types of certai...

Axel Hultman

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6

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DM
2007

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Feedback numbers of Kautz digraphs

13 years 4 months ago

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Jun-Ming Xu, Ye-Zhou Wu, Jia Huang, Chao Yang

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9

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DM
2007

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Matroids on convex geometries (cg-matroids)

13 years 4 months ago

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We consider matroidal structures on convex geometries, which we call cg-matroids. The concept of a cg-matroid is closely related to but different from that of a supermatroid intro...

Satoru Fujishige, Gleb A. Koshevoy, Yoshio Sano

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17

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DM
2007

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Small subgraphs of random regular graphs

13 years 4 months ago

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The main aim of this short paper is to answer the following question. Given a ﬁxed graph H, for which values of the degree d does a random d-regular graph on n vertices contain ...

Jeong Han Kim, Benny Sudakov, Van H. Vu

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3

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DM
2007

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On arithmetic and asymptotic properties of up-down numbers

13 years 4 months ago

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Francis C. S. Brown, Thomas M. A. Fink, Karen Will...

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5

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DM
2007

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On the number of zero-sum subsequences

13 years 4 months ago

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Hui-Qin Cao, Zhi-Wei Sun

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11

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DM
2007

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3-Designs with block size 6 from PSL(2, q) and their large sets

13 years 4 months ago

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We investigate the existence of 3-designs and uniform large sets of 3-designs with block size 6 admitting PSL(2, q) as an automorphism group. We show the existence of simple 3-(28...

G. R. Omidi, M. R. Pournaki, Behruz Tayfeh-Rezaie

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8

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DM
2007

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On partitioning of hypergraphs

13 years 4 months ago

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Sergei L. Bezrukov, Roberto Battiti

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