Báo cáo toán học: "a matrix representation of graphs and its spectrum as a graph invariant" ppt

... electronic journal of combinatorics 13 (2006), #R34 13 a matrix representation of graphs and its spectrum as a graph invariant David Emms Department of Computer Science University of York, York ... Graph equivalence and characterization via a continuous evolution of a physical analog, cond-mat/0209112. [7] F. Harary, Frank and R. Z. Norman, Some propert...

Ngày tải lên: 07/08/2014, 13:21

... Research Laboratory, New Mexico State University, Las Cruces NM. Yamanashi, Masa-aki. (1987). Metonymic interpretation and associative processes in natural language. In Language and Artificial ... Labora- tory, New Mexico State University, Las Cruces NM. Kamei, Shin-ichiro and Wakao, Takahiro. (1992). Metonymy: reassessment, sur- vey of acceptability, and its treatment...

Ngày tải lên: 23/03/2014, 20:20

... OF INVARIANT REPRESENTATIONS FROM A STATISTICAL REPRESENTATION AND FROM AN ABSTRACT GRAPH Up to this point, we have associated a Riemann space to an object and we have characterised the curvature ... is a statistical representation based on a novel his- togram and the second representation is a topological one based on an abstract graph. These representations are in...

Ngày tải lên: 22/06/2014, 23:20

... makes use of the fact that to any matching X one can associate a Ferrers diagram λ(X) in a natural way (see Section 2.4 for a detailed explanation). m X Figure 1.4. The matching composed out of ... right and interpreting a 0 as a unit up-step and a 1 as unit right-step. From the starting point of the obtained path we draw a vertical segment up- wards, and from th...

Ngày tải lên: 07/08/2014, 08:22

... extension of Br`egman’s theorem to general graphs was achieved by Kahn and Lov´asz [8], and independently proved by Friedland [4]. Theorem 2 (Kahn-Lov´asz [8]). For G an arbitrary graph, φ(G) ... A proof of the Kahn-Lov´asz theorem The entropy proof of the Kahn-Lov´asz theorem is complicated by the fact that there can be edges of the graph (and a fixed matching) amongst...

Ngày tải lên: 08/08/2014, 12:23

... Enhanced Ras maturation by heat stress was associated with a heightened activation of extra- cellular signal-regulated kinase (ERK), a key mediator of both mitogenic and stress signaling pathways, ... Suhan PJ (1985) Morphological study of the mammalian stress response: characterization of changes in cytoplasmic organelles, cytoskeleton, and nucleoli, and appearance of int...

Ngày tải lên: 07/03/2014, 12:20

... coli strains, JM109 and Bl21, were purchased from Takara (Kyoto, Japan) and Toyobo (Osaka, Japan), respectively. QuikChange XL Site-Directed Mutagenesis Kit was from Stratagene (La Jolla, CA, USA). Construction ... heme-binding capacities of the wild-type hIZA1 and mutants. The capacities were estimated by measuring the A 402 ⁄ A 280 ratios (mean and SD of triplicate expressio...

Ngày tải lên: 30/03/2014, 11:20

... grade of BSI and careful selection of candidates for NOM is advisable for a safe conservative management choice. In the most recent years a liberal and more aggressive use of angiography has often ... mortality rate of 12.6%. The authors concluded that the majority of their deaths were a result of delayed treatment of intra-abdom- inal injuries, and suggested that 70...

Ngày tải lên: 21/06/2014, 19:20

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Ngày tải lên: 05/08/2014, 15:20

... are designed to deal with the case when the average degree of the graph is large. We shall prove that an r-regular graph without 3 and 5 cycles has an independence number of at least α(G) ≥  nr 6 . Indeed ... regular graphs in terms of a measure of the concentration of edges. Monien and Speckenmeyer in [6] investigated the special Ramsey number r k (q), the largest numb...

Ngày tải lên: 07/08/2014, 06:20