Báo cáo toán học: "Regular spanning subgraphs of bipartite graphs of high minimum degree" docx

... referee for the useful remarks. the electronic journal of combinatorics 14 (2007), #N21 6 Regular spanning subgraphs of bipartite graphs of high minimum degree B´ela Csaba ∗† Submitted: Aug 1, 2007; ... electronic journal of combinatorics 14 (2007), #N21 2 3.2 Proof of part II For proving part II of the theorem we want to construct a class of balanced bipartite gr...

Ngày tải lên: 07/08/2014, 15:22

... (simple, undirected) graphs. An F -factor of G is a spanning subgraph of G whose components are all isomorphic to F .A(complete) F -factorisation of G is a decomposition of G as a union of edge-disjoint ... is to complete the study of factorisation of balanced complete bipartite graphs K n,n into factors each of whose components are K p,q . This subject began with the s...

Ngày tải lên: 07/08/2014, 08:20

... induced subgraph S is bipartite, and that any v ∈ S has a constant degree k. Th en P S is a Gorenstein polytope of codegree k. Proof. The proof is similar to the one of Beck et al. [2, Prop.1]. ... point of S lies on some edge in M. the electronic journal of combinatorics 17 (2010), #R8 8 of S. As a general reference on the Ehrhart theory of lattice polytopes we refer to the re...

Ngày tải lên: 08/08/2014, 11:20

... as the product of all parts of all partitions of n. It also equals b n , which is defined as the product of all factorials of all multiplicities of parts in partitions of n. Proofs of this may be ... be the number of partitions of n. The number p ∗ (n) of regular partitions of n equals the number of class regular partitions of n and then p  (n)=p(n) − p ∗ (n) is th...

Ngày tải lên: 07/08/2014, 07:21

... is a root of f 1 (x) = 0. This completes the proof. ✷ 3 The proof of The orems 1.5 and 1.6 We will need the following technical lemma whose proof is an easy modification of the proof of Theorem ... if R = K r+1−m + M m/2 . This completes the proof. ✷ Proof of Theorem 1.4 . Let H be a graph in H(r, m) with λ 1 (H)  ρ 2 (r, m). With similar proof of Claim 1 in Theorem 1.3, we obtain...

Ngày tải lên: 08/08/2014, 12:23

... current value of sample NP-2 was about one order of magnitude higher than that of reference samples (10 −3 A/cm 2 ), due to the smaller barrier height of NP-2 (0.87 eV) compared with that of Ref ... the value of 5.18 × 10 5 for Ref. The increased electric field of the samples with the Au and Ag NPs is mainly attributed to the reduction of barrier height as the effective...

Ngày tải lên: 20/06/2014, 20:20

... mechanisms of action could offer an additional strategy against drug resistance of viruses. Several examples of non-nucleoside inhibitors have been proposed as candidate drugs for the treatment of ... used on treatment of HSV infections [3–5]. However, the widespread use of these compounds has been associated with the emergence of drug-resistant HSV strains [5]. The discover...

Ngày tải lên: 20/06/2014, 20:20

... (management of alternatives), we developed a method of recording alternatives at each step with maintenance of logical consistency using the TMS and successfully supported the management of tradeoffs ... scenario. The results of the evaluation indicated that, while the profit satisfies the objective value of more than 100%, the reduction of CO 2 emissions does not fulfill ei...

Ngày tải lên: 20/06/2014, 21:20

... for a class of even-order differential equations Qi-Ming Zhang ∗1 and Xiaofei He 2 1 College of Science, Hunan University of Technology, Zhuzhou, Hunan 412000, P.R. China 2 College of Mathematics ... a class of even-order differential equations Journal of Inequalities and Applications 2012, 2012:5 doi:10.1186/1029-242X-2012-5 Qi-Ming Zhang (zhqm20082008@sina.com) Xiaofei He (hexiao...

Ngày tải lên: 20/06/2014, 21:20

... signal bandwidth of a single pulse in a GFSK system is at most one half of that of a PPM system. But this does not mean that the maximum possible data rate of a G FSK systemisonehalfofthatofaPPMsystem.InUWB channels, ... frequency ranges of filters. Filter 1 is designed to pass the signal energy of p 1 (t) and reject that of p 2 (t), and Filter 2 passes the signal energy of p...

Ngày tải lên: 20/06/2014, 21:20