Báo cáo toán học: " Kannan-type contractions and fixed points in uniform spaces" pot

... as: Włodarczyk and Plebaniak: Kannan-type contractions and fixed points in uniform spaces. Fixed Point Theory and Applications 2011 2011:90.Submit your manuscript to a journal and beneﬁ t from:7 ... 2011:90http://www.fixedpointtheoryandapplications.com/content/2011/1/90Page 14 of 24RESEARCH Open Access Kannan-type contractions and fixed points in uniform spacesKazimierz Włodarczyk* and Robert ... study of the following interesting aspects of fixe d point theory in metric spaces and has intensified in the past few decades: (a) the existence and uniqueness of fixed points of various generalizations...

Báo cáo hóa học: " Stability of common fixed points in uniform spaces" ppt

... Convergence of a sequence of fixed points in a uniform space. Mat Vesnik. 13(28), 131–141 (1976)2. Angelov, VG: A continuous dependence of fixed points of -contractive mappings in uniform spaces. ... points, known as the stability (orcontinuity) of fixed points, has been widely studied in fixed point theory in various set-tings (cf. [1-18]). The orig in of this problem seems into a classical ... list of author information isavailable at the end of the articleAbstract Stability results for a pair of sequences of mappings and their common fixed points in a Hausdorff uniform space using...

Báo cáo toán học: "Mapping cones and exact sequences in KK-theory " pptx

... h 1" alt ="" ...

Báo cáo toán học: "Carlesons measures and operators on star-invariant subspaces " potx

... h 1" alt ="" ...

Báo cáo toán học: " Parity Systems and the Delta-Matroid Intersection Problem" pot

... 2-matroidsLet Q1 and Q2be 2-matroids. When Q1 and Q2have the same ground-set and skew classes we shall use Q1+ Q2to denote the parity system which is the sum of Q1 and Q2. When Q1 and Q2have ... sincer1(A) ≤ rt1(A) ≤ r1(A) + 1 and r1(A) ≤ r˜t1(A) ≤ r1(A) + 1. Parity Systems and the Delta-Matroid Intersection ProblemAndr´e Bouchet∗ and Bill Jackson†Submitted: February ... Find whether G1 and G2have orthogonal Euler tours.If G1 and G2are equal to the graph G of Problem 1.7 and each directedtransition of G has the same colour in G1 and G2, then T1 and T2are...

Báo cáo toán học: " Tight Quotients and Double Quotients in the Bruhat Order" doc

... hypotheses of the above claim are satisﬁed, and hence x(µ)  x(ν).On the other hand, bearing in mind that µ and ν are in the interior of the same Weylchamber C,andwµ = µ+ and wν = ν+are dominant, ... β∨ ν (Lemma 4.5) and the induction continues. For the numbering of the vertices of A0 in what follows, refer to Figure 4.Corollary 5.6. The Bruhat orderings of the double quotients (Bn.θ1)S, ... , including the cross section X and the subspace V .Moreover,V alsocarries a standard ordering relative to the root system Φ; however, these two “standard”orderings of V coincide: a point in...

Báo cáo toán học: "Total domination and matching numbers in claw-free graphs" doc

... claw-free graphs with minimum degree atleast three that have equal total domination and matching numbers. Keywords: claw-free, matching number, total domination number1 IntroductionTotal domination ... graph G is a matching if no two edges in M are incidentto the same vertex. The matching number of G is the maximum cardinality of a matching of G.AsetS of vertices in G is a total dominating set ... 4-cycle containing both v1 and v2or containing both v3 and v4.Proof. Suppose, to the contrary, that there is a 4-cycle containing both v1 and v2orcontaining both v3 and v4. By symmetry,...

Báo cáo toán học: "Distance domination and distance irredundance in graphs" ppsx

... generalizing a result of Favaron and Kratsch [4]regarding k = 1.Keywords: domination, irredundance, distance domination number, total domi-nation number, connected domination number, distance irredundance ... − D and D is at most k (and D induces aconnected graph in G). The minimum cardinality of a (connected) distance k-dominatingset in G is the (connected) distance k -domination number of G, denoted ... (connected) distance k-dominating setof G if the distance between each vertex u ∈ V − D and D is at most k (and D induces a connected graph in G). The minimum cardinality of a (connected)distance...

Báo cáo toán học: "Area distribution and scaling function for punctured polygons" potx

... ∞.References[1] Madras N and Slade G 1993 The Self-Avoiding Walk (Boston: Birkh¨auser)[2] Hughes B D 1995 Random Walks and Random Environments, Vol I Random Walks(Oxford: Clarendon)[3] Vanderzande C 1998 ... quitestraight-forward to generalise the algorithm to count twice punctured staircase polygons and in this case we obtained the series to perimeter 502 for k = 0, perimeter 450 for k = 1 and 2 and to ... half-perimeter generating function of the model by P(x) =m≥0xmpm.the electronic journal of combinatorics 15 (2008), #R53 19Area distribution and scaling function for punctured polygonsChristoph...

Báo cáo toán học: "Global alliances and independent domination in some classes of graphs" pdf

... γ(G) and i(G) are respectively the minimum cardinality of a dominating set and of an independent dominating set and β(G) is the maximumcardinality of an independent set. Alliances are deﬁned in ... corona of a graph is obtained byattaching a pendant edge at each vertex of G.the electronic journal of combinatorics 15 (2008), #R123 2Global alliances and independent domination in some classes ... dS(v) and are all disjoint. Let J be anymaximal independent set of G[S] and q the number of components of the forest inducedby S \ J. The set I = Jv∈S\JL(v) is a maximal independent set of...

Báo cáo toán học: "Topological circles and Euler tours in locally ﬁnite graphs" pptx

... containing a finite odd cut of Gextends to an element of C.1 IntroductionErd˝os et al. [17] characterised the in nite graphs G containing an Euler tour, that is, atwo-way in nite walk traversing ... ny arc in |G| with on e endpoint in X and one in Y contains an edge from F .4 Euler tours In this section we prove Theorem 1.3, but before we do so let us consider an example indi-cating why, ... Diestel and D. Kühn. On in nite cycles II. Combinatorica , 24:91–116, 2004.[15] R. Diestel and D. Kühn. Topological paths, cycles and spanning trees in infinitegraphs. Europ. J. Combinatorics,...

Báo cáo toán học: "Rationality, irrationality, and Wilf equivalence in generalized factor order" ppsx

... of the embedding factor w′= 343 which has embedding index 5, and the two 2’s of u are in po sitions 6 and 7. Note that we obtain ordinary factor order by taking P to be an antichain. Also, wewill ... explainsall the Wilf equivalences in S5. In particular, the results of Section 4 and the lastparagraph of Section 5 generat e all of the Wilf equivalences in Table 1 with one exception. In ... “weakly increasing” and “maximum” have their usual meanings. Also, let w+mbe the result of applying the+ operator m times. By using the previous lemma a nd induction, we obtain the followingresult....

Báo cáo toán học: "Bootstrap Percolation and Diﬀusion in Random Graphs with Given Vertex Degree" pptx

... Diﬀusion of innovations on random networks: Understanding the chasm. In Proceedings of WINE 2 008, pages 178–185, 2008.[20] M. Molloy and B. Reed. A critical point for random graphs with a given ... the study of percolation in a random graph with given vertex degrees. We refer to Section 3 for more details.k-Core in Random Graphs with Given Degree Sequence. Let k  2 be a ﬁxedinteger. The ... t) in the case of ra ndom graphs with g iven vertex degrees. The next section describes thismodel of ra ndom graphs. 1.1 Random Graphs with Given node Degrees In this paper, we investigate random...

Báo cáo toán học: "Dry matter and nitrogen allocation in western redcedar, western hemlock, a" ppsx

... production and survival in thefield. High N concentrations in seedlings may lead toOriginal articleDry matter and nitrogen allocation in western redcedar, western hemlock, and ... balance and organic acids in western redcedar, western hemlock, and Douglas fir seedlings grown in low- and high-N soils, Can. J.For. Res. 29 (1999) 669-678.[16] Hawkins ... relative dry -matter increment(Loge(DMfinal) - Loge(DMinitial); RDMI) and relative N increment (Loge(Nfinal) - Loge(Ninitial); RNI) in each soil and accumulated35...

Báo cáo toán học: "Partitions, rooks, and symmetric functions in noncommuting variables" pdf

... Tevlin, L., Thibon, J Y.,Thiem, N., Venkateswaran, V., Vinroot, C. R., Yan, N., and Mike, Z.Supercharacters, symmetric functions in no ncommut ing variables, and related Hopfalgebras. Preprint ... Rosas, M., and Zabrocki, M. Invariants and coinvariants of t he symmetric groups in noncommuting variables. Canad. J.Math. 60, 2 (20 08), 266–296.[4] Chen, W. Y. C., Li, T. X. S., and Wang, ... is easy to see that the maps R → πR and the electronic journal of combinatorics 18(2) (2011), #P3 2Partitions, rooks, and symmetric functions in noncommuting variablesMahir Bilen CanDepartment...

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