458 search results - page 4 / 92 » Perfect Skolem sets |
COMBINATORICS
2007
14 years 9 months ago
2007
We study the structure of a minimum dominating set of Cn 2n+1, the Cartesian product of n copies of the cycle of size 2n + 1, where 2n + 1 is a prime.
WG
2001
Springer
15 years 1 months ago
2001
Springer
We call an edge e of a perfect graph G critical if G − e is imperfect and say further that e is anticritical with respect to the complementary graph G. We ask in which perfect gr...
182
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AML
2011
14 years 4 months ago
2011
In this paper we prove three theorems about the theory of Borel sets in models of ZF without any form of the axiom of choice. We prove that if B ⊆ 2ω is a Gδσ-set then either...
64
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SIAMDM
2000
14 years 9 months ago
2000
A graph is a split graph if its vertices can be partitioned into a clique and a stable set. A graph is a k-split graph if its vertices can be partitioned into k sets, each of which...
FROCOS
2009
Springer
15 years 4 months ago
2009
Springer
Deduction modulo consists in applying the inference rules of a deductive system modulo a rewrite system over terms and formulæ. This is equivalent to proving within a so-called co...