Báo cáo toán học: "Sets of Points Determining Only Acute Angles and Some Related Colouring Problems" pot

... during the past decade, the extracellular deposits of beta- amyloid [A ] peptides forming plaques and the intracellular neurofibrillary tangles have been regarded as the major histopathological ... overnight incubation with a primary antibody (Abcam, Cambridge, MA, USA) was performed for the specific binding to A peptides on the HeLa cells. - 2 - Abstract The existence...

Ngày tải lên: 20/06/2014, 20:20

... EXPRESS Open Access Synthesis of highly transparent ultrananocrystalline diamond films from a low- pressure, low-temperature focused microwave plasma jet Wen-Hsiang Liao 1,2 , Da-Hua Wei 1,2* and Chii-Ruey ... of highly transparent ultrananocrystalline diamond films from a low-pressure, low- temperature focused microwave plasma jet. Nanoscale Re...

Ngày tải lên: 20/06/2014, 20:20

... method of the synthesis of metal hexacyanoferrate nanoparticles. Keywords: reverse micelles; template method; nanoparticles; nickel hexacyanoferrate. - 9 - the nanostructure of the ... size and size distribution. Furthermore, it was found that - 1 - Structure of reverse microemulsion-templated metal hexacyanoferrate nanoparticles Alberto Gutiérrez-Bec...

Ngày tải lên: 20/06/2014, 20:20

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Ngày tải lên: 20/06/2014, 20:20

... fragments of Bin A genes encoding 42-kDa toxin of local strains of B. sphaericus. Figure 3. Phylogenetic trees of the DNA fragments of Bin B genes encoding 51-kDa toxin of local strains of B. ... locally isolated strains 3 The toxicity of B. sphaericus strains is mainly attributed to the presence of binary toxin (Bin A, Bin B) and/or mosquitocidal (Mtx) toxin...

Ngày tải lên: 20/06/2014, 20:20

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Ngày tải lên: 05/08/2014, 15:21

... direct consequence of Theorem 2.1 we obtain Consequence 2.1. Applying transformation L and R on minimal unavoidable sets leads to minimal unavoidable sets again. The proofs of the following lemmas ... a minimal unavoidable set. If Y can be obtained from X by applying first some transformation RC or LC, and then some transformation Generating of Minimal Unavoidable Sets...

Ngày tải lên: 06/08/2014, 05:20

... separates all the sets of at most  vertices of G.The dedicated terminology [12] for such codes is (1, ≤ ) -identifying codes. ThesetsI(X)are said to be the identifying sets of the corresponding ... sets of at most  vertices of G,andifalltheI(X, C)’s are nonempty then we say that C covers the sets of at most  vertices of G.WesaythatC is a code identifying set...

Ngày tải lên: 07/08/2014, 08:22

... journal of combinatorics 13 (2006), #R12 17 Sets of Points Determining Only Acute Angles and Some Related Colouring Problems David Bevan Fernwood, Leaford Crescent, Watford, Herts. WD24 5TW England dbevan@emtex.com Submitted: ... lower bound of Erdos and Făuredi. We also present lower bounds for some generalisations of the acute angles problem, considering e...

Ngày tải lên: 07/08/2014, 13:21

... finitely many such values of x. the electronic journal of combinatorics 15 (2008), #R89 2 Asymptotics of coefficients of multivariate generating functions: improvements for smooth points Alexander ... coefficients F β as β → ∞ for large classes of series that arise often in applications. In this article we further their program of asymptotics of coefficients of...

Ngày tải lên: 07/08/2014, 21:20

... electronic journal of combinatorics 15 (2008), #R125 8 Generalizations of Partial Difference Sets from Cyclotomy to Nonelementary Abelian p-Groups John Polhill Department of Mathematics, Computer ... type partial difference sets [3]. We can create a product of such sets with certain Latin square type partial difference sets in nonelementary abelian grou...

Ngày tải lên: 07/08/2014, 21:20

... ∈ F x }. The degree of x is the size of F x . The tra ce of a set F on another set X is F ∩ X and is denoted by F | X . The trace of a family F of sets is just the family of traces, i.e. F| X = ... same sets of F. The number of sets in F containing both x 1 and x 2 is at most  n−2 k−2  , thus removing these sets from F there remains a family F 1 of subsets of [n] \ {x 1...

Ngày tải lên: 07/08/2014, 21:21

... it is therefore disjoint from Q ′ . 7 Theorem 2.4 An A- loop is a loop in which all inner mappings are automorphisms. The variety of A- loops is larger than that of groups but is certainly not all loops. ... number of related results including a generalization of the D´enes-Hermann theorem and provide an elementary proof of a weak form o f the Hall-Paige...

Ngày tải lên: 07/08/2014, 21:21

... combinations of elementary polynomials. For certain partitions π, however, there is a simpler formula for Pr(π): for example, Curtis, Ingerman, and Morrow [CIM98], and Fomin [Fom01], showed that for ... graph which for m a tripod grove (for N even) or a tripartite grove (for N odd). The relevant tripod or tripartite partition is the one for which the three sides of...

Ngày tải lên: 08/08/2014, 01:20

... journal of combinatorics 18 (2011), #P59 5 Sets of integers that do not contain long arithmetic progressions Kevin O’Bryant ∗ Department of Mathematics The City University of New York College of ... for all k = 4. We denote by r k (N) the maximum possible size of a subset of {1, 2, . . . , N} that does not contain k numbers in arithmetic progression. Behr...

Ngày tải lên: 08/08/2014, 14:22