Báo cáo toán học: "Congruence classes of orientable 2-cell embeddings of bouquets of circles and dipoles" pdf

... e it ) the electronic journal of combinatorics 17 (2010), #R41 6 Congruence classes of orientable 2-cell embeddings of bouquets of circles and dipoles ∗ Yan-Quan Feng Department of Mathematics Beijing ... with loops or multiple edges, and by using this method we enumerate the congruence classes of 2-cell embeddings of a bouquet of circles and a dipole...

Ngày tải lên: 08/08/2014, 12:22

... We the electronic journal of combinatorics 9 (2003), #R19 10 2.3 The number of descents and the Tutte polynomial of planar maps A number of refinements of Theorem 1 and Corollary 5 exist. To our ... descents (z), number of left-to-right and right-to-left maxima (u and v). The method of Section 2.2 applies verbatim, and provides the following counterparts of Theorem 1...

Ngày tải lên: 07/08/2014, 07:21

... A 1 avoids 1342 and 312 and D avoids 1342 and 3124 4. the subsequence D (consisting of a, B s and C) avoids 1342 and 3124, and a,the first element of D, is not the largest element of D 5. the blocks ... (consisting of a, B s ,andC) avoids 1243 and 2134, and a,the first element of D, is not the largest element of D 5. the B i , i<sare interspersed so that they occu...

Ngày tải lên: 07/08/2014, 08:22

... family of sets. If |F| >r!(t − 1) r , then F contains a sunflower with t petals. 3 Proofs of Theorems Disclaimer: As noted above, the first proof of Theorem 2.6 relies on the theorems of Ramsey and ... element A of its pedestal with the set of atoms dominated by A. In particular, we define the span S(F) of the pedestal to be the union of these sets of atoms, so S(F) is lik...

Ngày tải lên: 07/08/2014, 13:21

... (e.g. flowering fields) Speed of detection of resources Number of nectar and pollen foragers Time and frequency of foraging trips Distribution of breeding and foraging territories or home ... description of what the model actually reflects (representativeness) and an evaluation of the realism of the model (validation) and applied scenarios. While the ad...

Ngày tải lên: 20/06/2014, 20:20

... (e.g. flowering fields) Speed of detection of resources Number of nectar and pollen foragers Time and frequency of foraging trips Distribution of breeding and foraging territories or home ... view and the needs of risk assessors. Technical description of models A major obstacle in the application and acceptance of population models is the communication...

Ngày tải lên: 20/06/2014, 20:20

... concentration of cAMP following exposure to W-7 As mentioned above, W-7 repressed the activity of LiP and MnP and transcription of lip and mnp genes even in the presence of cAMP and IBMX, which ... repeated 4 times, and the means and standard deviations of enzyme activity were calculated. Measurement of dry fungal weight The culture of each flask was recov...

Ngày tải lên: 20/06/2014, 20:20

... displayed in a mobile handset (screen size of 2.8 inches, resolution of 320*240 pixels) instead of a normalised LCD display, and users were asked to hold the handset on their hands with a free viewing distance ... (RT) and right bottom (RB): boxplots of quality assessments. Figure 2 - Evolution of SSIM and quality scores for impaired long sequence – high spatial complexity Fig...

Ngày tải lên: 20/06/2014, 21:20

... theorem of the iterative sequence (3.1). Zhu et al. Fixed Point Theory and Applications 2011, 2011:106 http://www.fixedpointtheoryandapplications.com/content/2011/1/106 Page 9 of 13 Proof. It ... most of these articles, the operator T remains a self-mapping of a nonempty closed convex subset C of a uniformly convex Banach space X. If, however, the domain of T, D(T), is a proper...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 05/08/2014, 15:20