Báo cáo toán học: "Infinitely many hypermaps of a given type and genus" pot

... CAS E REP O R T Open Access Visual diagnosis: Rectal foreign body: A primer for emergency physicians Bobby Desai Abstract We present a case that is occasionally seen within emergency departments, ... removal of the object for clinicians. Case A 39-year-old male presented to the Emergency Depart- ment with vague complaints of abdominal pain and con- stipation. He st...

Ngày tải lên: 20/06/2014, 21:20

... (3/19) of the border 29 Table 5. Optimization of AMT conditions in 100 ml of liquid IM Number of conidia Number of Agrobacterium cells Ra tio of conidia : Agrobacterium Mean of transformants ... upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Agrobacterium tumefaciens-mediated transformation of Aspergillus ac...

Ngày tải lên: 20/06/2014, 21:20

... Corporation Journal of Inequalities and Applications Volume 2011, Article ID 873184, 16 pages doi:10.1155/2011/873184 Research Article Normality Criteria of Lahiri’s Type and Their Applications Xiao-Bin ... Lemma. It’s natural to ask whether such normality criteria of Lahiri’s 10 Journal of Inequalities and Applications 3. Proof of Theorem 1.1 Without los...

Ngày tải lên: 21/06/2014, 05:20

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Ngày tải lên: 05/08/2014, 10:20

... V is either in γ or is adjacent to a vertex in γ.Thedomination number D of G is the size of a dominating set of smallest cardinality. Domination has been the subject of extensive research; see ... zero as n →∞. The treatises of Bollob´as [2] and Janson et al. [8] between them cover the theory of random graphs in admirable detail. Dreyer [3] generalizes some resul...

Ngày tải lên: 07/08/2014, 06:22

... eigenvalues, and showed that the eigenvalues that are neither dominant nor equal to 1 are o((log n) 2/5 ). Added in proof: our evaluation of the permanent of the original matrix of Redheffer, given in Theorem ... theoretic way, recall that an ordered factorization of an integer m is a representation m = a 1 a 2 a k ,inwhichalla i sare≥ 2 and the order of the f...

Ngày tải lên: 07/08/2014, 08:22

... permutation of X. In this paper, we show that if G is nilpotent of class c or supersolvable of length c then G always acts with distinguishing number at most c + 1. We obtain that all metacyclic ... groups act with distinguishing number at most 3; these include all groups of squarefree order. We also prove that the distinguishing number of the action of the general lin...

Ngày tải lên: 07/08/2014, 13:21

... journal of combinatorics 15 (2008), #R4 11 The Minor Crossing Number of Graphs with an Excluded Minor Drago Bokal Department of Combinatorics and Optimization University of Waterloo Waterloo, Canada dbokal@uwaterloo.ca Gaˇsper ... Pinontoan and R. Bruce Richter. Crossing numbers of sequences of graphs. II. Planar tiles. J. Graph Theory, 42(4):332–341, 2003. [33...

Ngày tải lên: 07/08/2014, 15:22

... most graphs on n vertices contain substantially many copies of any fixed graph, but contain no complete bipartite subgraphs with both parts larger than C log n, for some C > 0, independent of n. Hence, ... graph of order 2; - K 2 (s, t) for the complete bipartite graph with parts of size s and t; - f| X for the restriction of a map f to a set X. Specific notation Suppos...

Ngày tải lên: 07/08/2014, 15:23

... 10 LA 0 1 2 X 1 0 X 3 2 3 1 0 3 2 0 1 LB 0 1 2 X 1 0 X 3 2 3 0 1 3 2 1 0 LC 0 1 2 X 1 2 X 3 2 3 0 1 3 0 1 2 LD 0 1 2 X 1 3 X 0 2 0 1 3 3 2 0 1 LE 0 1 2 X 1 3 X 2 2 0 1 3 3 2 0 1 LF 0 2 1 X 1 ... 3 2 3 0 1 3 1 2 0 LG 0 2 1 X 1 3 X 0 2 1 0 3 3 0 2 1 LH 0 2 1 X 1 3 X 0 2 0 3 1 3 1 0 2 LI 0 2 1 X 1 3 X 2 2 0 3 1 3 1 2 0 LJ...

Ngày tải lên: 07/08/2014, 15:23

... collection of subsets of [n + r]. Recall that a subset T ⊆  k i=1 A i is a partial transversal of A if there exists an injection φ : T → [k] such that t ∈ A φ(t) for all t ∈ T . The partial transversals ... . , a r +1}. By Remark 3.5, the path σ A + does not cross the path σ C . It is clear that the set of degree-r monomials of Γ is { m(σ) : σ is a path...

Ngày tải lên: 08/08/2014, 01:20

... dense random graph. The notion of a t-stable set is a generalisation of the notion of a stable set. Recall that a set of vertices S of a graph G is stable if no two of its vertices are adjacent. ... graphs. Combinatorica, 11(1):45–54, 1991. [19] D. Matula and L. Kuˇcera. An expose-and-merge algorithm and the chromatic number of a random graph. In Random Graph...

Ngày tải lên: 08/08/2014, 12:22

... elements of A have orders in {n/2, n/3}. For A to be a basis, we must have an element of each of these orders. Therefore, 6 | n. Multiplying by a unit, we may assume {0, 2, 3t} ⊆ A. Then A − 2 contains ... Sweden hegarty@chalmers.se Sarada Herke ‡ Mathematics and Statistics University of Victoria, Victoria BC, Canada V8W3R4 sarada@uvic.ca Submitted: Oct 5, 2009; Acce...

Ngày tải lên: 08/08/2014, 12:22

... coverings of these gives infinitely many hypermaps of type (l, m, n) and genus g  3. In particular, taking m = 2, if we can construct infinitely many planar maps of a given type, each with at least ... and −1 + i, the vertex at 2 to 0 and 1 + i, and the vertex at 2i to 1 + i and −1 + i. We have then, a t this stage, three triangular faces and one face of vale...

Ngày tải lên: 08/08/2014, 12:23

... non- cancer-related pain [1]. Undertreated chronic non-cancer pain causes significant economic, societal, and health impacts [2], and may be related to a lack of education for physicians about ... treatment facilities for efficient and cost-effective patient evaluation and treatment plan- ning purposes and is used as part of the standard clinical intake to measure patients' m...

Ngày tải lên: 11/08/2014, 18:20