Báo cáo toán học: " 3-Designs from PGL(2, q)" docx

... possibility of underestimation of PFC exposure through food contact materials. Mixtures of perfluorooctanesulfonamide esters are often used in the manufacture of water- and greaseproof papers ... eating 8 g of eel from Belgium with a concentration of 857 àg PFOS/kg fresh weight or eating 0.6 g of trout from the upper Sauerland region of Germany with a measured maximum leve...

Ngày tải lên: 20/06/2014, 21:20

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Ngày tải lên: 05/08/2014, 09:46

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Ngày tải lên: 05/08/2014, 09:46

... class="bi x0 y0 w2 h 3" alt =""

Ngày tải lên: 05/08/2014, 15:21

... Math., to appear. [2] BRENTI, F.: Log-concave and unimodal sequences in Algebra, Combinatorics and Geometry: an update. Contemporary Mathematics, 178, 71-84, 1994. [3] STANLEY, R.: Log-concave and ... R.: Log-concave and unimodal sequences in algebra, combinatorics and geometry. Graph theory and its applications: East and West (Jinan, 1986), 500-535, Ann. New York Acad. Sci., 576,NewYork,1989...

Ngày tải lên: 07/08/2014, 06:20

... parts are all of size one. Alternately, the complement of such a graph either has no edges or consists of the the disjoint union of three or fewer complete graphs. Proof. The complement of K − 5 is ... similar proofs for complexes of dimension 2 and higher. We conjecture that the answer is “yes,” but the complexity of the proof would be astronomical, even for dimension 2. Hidden...

Ngày tải lên: 07/08/2014, 06:20

... 68W25. Keywords: graph coloring, online algorithms. Abstract The problem of online coloring an unknown graph is known to be hard. Here we consider the problem of online coloring in the relaxed ... independence number α are known in advance. The unknown case can be handled via a doubling technique, see [5]. Without loss of generality, α ≥ n/ log n.Letq =(1/2) log n/α n. Before colori...

Ngày tải lên: 07/08/2014, 06:20

... 231–251. [29] A. C. H. Ling, Pairwise Balanced Designs and Related Codes, Ph. D. Thesis, Uni- versity of Waterloo, Canada, 1997. [30] A. C. H. Ling and C. J. Colbourn, Pairwise balanced designs with ... Pairwise Balanced Designs Malcolm Greig Greig Consulting 207-170 East Fifth St. North Vancouver BC, Canada, V7L 4L4 greig@sfu.ca Submitted: Oct. 6, 1998; Accepted: Oct. 23, 1999. A...

Ngày tải lên: 07/08/2014, 06:20

... G 0 =(V,E 0 )andG 1 =(V,E 1 )thatsatisfytherequirementsof Theorem 1.3. The vertex set V consists of the q-element subsets of X, |V | =  n q  = N. Two q-element subsets are adjacent in G 0 if their intersection is empty, while two q-element subsets ... Y 1 be the set of all disjoint pairs {A, B} of q-element subsets of an n-element X. δ 1 ({A 1 ,B 1 }, { A 2 ,B...

Ngày tải lên: 07/08/2014, 06:23

... not q- counting ordinary combinatorial structures but counting structures associated to vector spaces over the field of order q. Second, a q- species is a functor from a category of vector spaces to ... λ i ∈ F q .Then D = E ◦ F where F is the q- species defined F[V ]=  F q , if dim V =1, ∅, otherwise. Then  F(x)= q q − 1 x  D(x)=exp  q q − 1 x   D(x)= 1 (1 − x) q . Exam...

Ngày tải lên: 07/08/2014, 13:21

... 2 √ q if p   2 √ q and h ≥ 3 is odd, q + 2 √ q + 1 otherwise. (4.1) Regarding the completeness of the cubic arcs arising from nonsingular cubic curves, Hirschfeld and Voloch [6] show the ... 2 Codes from cubic curves and their extensions T. L. Alderson ∗ Mathematical Sciences University of New Brunswick Saint John, NB E2L 4L5 Canada tim@unbsj.ca A. A. Bruen † El...

Ngày tải lên: 07/08/2014, 15:23

... combinatorics 15 (2008), #R63 16 Determinant expressions for q-harmonic congruences and degenerate Bernoulli numbers Karl Dilcher ∗ Department of Mathematics and Statistics Dalhousie University, Halifax, ... [p] q ), (1.4) for primes p ≥ 3. More recently Shi and Pan [16] extended (1.3) to H p−1 (q) ≡ p − 1 2 (1 − q) + p 2 − 1 24 (1 − q) 2 [p] q (mod [p] 2 q ), for prime...

Ngày tải lên: 07/08/2014, 15:23

... counted by the Fibonacci numbers. These distribu- tions will give us q-Fibonacci numbers which are related to the q-Fibonacci numbers of Carlitz [2], Cigler [3, 4], and Goyt and Sagan [6]. Let the ... produced a class of q-Fibonacci numbers , which they related to q-Fibonacci numbers studied by Carlitz and Cigler. In this paper we will study the d istributions of some M...

Ngày tải lên: 08/08/2014, 01:20

... (i) and (iv) P 3 ∩ P 4 = {x} with x ∈ Z 6 . Let R denote a set the electronic journal of combinatorics 16 (2009), #R133 5 Lower Bounds for q-ary Codes with Large Covering Radius Wolfga ng Haas Immanuel ... the case k = 5. For k > 5 the computational effort became too la r ge for a systematical treatment. Here we got only a few sporadic new bounds: six bounds for k...

Ngày tải lên: 08/08/2014, 01:20

... à) and (n ||, ) are partitions for all n ≥ 2k since the hypotheses |à|, || k the electronic journal of combinatorics 16(2) (2009), #R19 20 Character Polynomials, their q-analogs and the Kronecker ... #R19 1 The c ,à, go by the name of Kronecker coeci ents and they may be interpreted as the multiplicity of the irreducible representation of S n indexed by λ in...

Ngày tải lên: 08/08/2014, 01:20