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COMBINATORICS
2006
15 years 3 months ago
2006
We present a decomposition formula for the weighted zeta function of an irregular covering of a graph by its weighted L-functions. Moreover, we give a factorization of the weighte...
COMBINATORICS
2006
15 years 3 months ago
2006
We determine the circular chromatic index of flower snarks, by showing that c(F3) = 7/2, c(F5) = 17/5 and c(Fk) = 10/3 for every odd integer k 7, where Fk denotes the flower snar...
114
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COMBINATORICS
2006
15 years 3 months ago
2006
In this paper, we prove the existence of a cyclic (v, 4, 1)-BIBD for v = 12t + 4, 3 t 50 using computer programs, which are useful in recursive constructions for cyclic designs....
114
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COMBINATORICS
2006
15 years 3 months ago
2006
We present both probabilistic and constructive lower bounds on the maximum size of a set of points S Rd such that every angle determined by three points in S is acute, considerin...
122
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COMBINATORICS
2006
15 years 3 months ago
2006
The linear complexity of a matrix is a measure of the number of additions, subtractions, and scalar multiplications required to multiply that matrix and an arbitrary vector. In th...