DM 1999 | Sciweavers

10

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1999

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Basis partitions and Rogers-Ramanujan partitions

13 years 4 months ago

Every partition has, for some d, a Durfee square of side d. Every partition with Durfee square of side d gives rise to a "successive rank vector" r = (r1,

Michael D. Hirschhorn

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DM
1999

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Niemeier lattices and Type II codes over Z4

13 years 4 months ago

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Alexis Bonnecaze, Philippe Gaborit, Masaaki Harada...

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9

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DM
1999

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Analytic combinatorics of non-crossing configurations

13 years 4 months ago

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Philippe Flajolet, Marc Noy

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9

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DM
1999

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Forbidden subsequences and Chebyshev polynomials

13 years 4 months ago

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Timothy Chow, Julian West

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15

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DM
1999

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Directed animals, forests and permutations

13 years 4 months ago

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In this paper, we illustrate a method to enumerate two-dimensional directed animals, with compact sources, on both the square and the triangular lattice. We give a recursive descr...

Elena Barcucci, Alberto Del Lungo, Elisa Pergola, ...

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DM
1999

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A simple bijection for the regions of the Shi arrangement of hyperplanes

13 years 4 months ago

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Christos A. Athanasiadis, Svante Linusson

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13

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DM
1999

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The density of ones in Pascal's rhombus

13 years 4 months ago

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Pascal's rhombus is a variation of Pascal's triangle in which values are computed as the sum of four terms, rather than two. It is shown that the limiting ratio of the n...

John L. Goldwasser, William Klostermeyer, Michael ...

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DM
1999

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On an equivalence in discrete extremal problems

13 years 4 months ago

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We introduce some equivalence relations on graphs and posets and prove that they are closed under the cartesian product operation. These relations concern the edge-isoperimetric p...

Sergei L. Bezrukov

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15

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DM
1999

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Hamiltonian powers in threshold and arborescent comparability graphs

13 years 4 months ago

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We examine powers of Hamiltonian paths and cycles as well as Hamiltonian (power) completion problems in several highly structured graph classes. For threshold graphs we give effic...

Sam Donnelly, Garth Isaak

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DM
1999

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A class of functions and their application in constructing semi-biplanes and association schemes

13 years 4 months ago

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We give an alternative proof of the fact that a planar function cannot exist on groups of even order. The argument involved leads us to define a class of functions which we

Robert S. Coulter, Marie Henderson

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