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DM
2006
115views more  DM 2006»
14 years 9 months ago
3-Designs from PSL(2, q)
The group PSL(2, q) is 3-homogeneous on the projective line when q is a prime power congruent to 3 modulo 4 and therefore it can be used to construct 3-designs. In this paper, we ...
Peter J. Cameron, Hamid Reza Maimani, G. R. Omidi,...
DM
2006
79views more  DM 2006»
14 years 9 months ago
Conditional colorings of graphs
For an integer r > 0, a conditional (k, r)-coloring of a graph G is a proper k-coloring of the vertices of G such that every vertex of degree at least r in G will be adjacent t...
Hong-Jian Lai, Jianliang Lin, Bruce Montgomery, Ta...
DM
2007
72views more  DM 2007»
14 years 9 months ago
Multicomplexes and polynomials with real zeros
We show that each polynomial a(z)=1+a1z+· · ·+adzd in N[z] having only real zeros is the f-polynomial of a multicomplex. It follows that a(z) is also the h-polynomial of a Cohe...
Jason Bell, Mark Skandera
81
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DM
2007
86views more  DM 2007»
14 years 9 months ago
Short cycle connectivity
Short cycle connectivity is a generalization of ordinary connectivity—two vertices have to be connected by a sequence of short cycles, in which two consecutive cycles have at le...
Vladimir Batagelj, Matjaz Zaversnik
IJON
2002
83views more  IJON 2002»
14 years 9 months ago
An adaptive spike-timing-dependent plasticity rule
We examine the conditions under which spike-timing-dependent plasticity (STDP) normalizes post-synaptic
Jesper Tegnér, Ádám Kepecs