... Local Theorem implies Local Theorem In the paper [A12], it will be shown that Local Theorem implies Local Theorem , and also that Local Theorem implies Local Theorem A proof of Local Theorem ... formula In the second paper [II], we established a key reduction in the proof of one of the global theorems In this paper, we shall complete the proof of the theorems We shall combine the global ... a minor gap at the end of the argument in [AC, §2.17] We shall establish the global theorems in Section With the proof of Local Theorem in hand, we will see that the expansions of Sections 2–5...
Ngày tải lên: 05/03/2014, 23:20
Ngày tải lên: 05/08/2014, 09:46
Báo cáo toán học: "Random Cayley graphs are expanders: a simple proof of the Alon–Roichman theorem" potx
... below, the elements of graph theory, representation theory, and probability theory required for the statement of the theorem and the subsequent proof The exposition here is primarily for the purposes ... proof of the Alon-Roichman theorem We shall demonstrate tail bounds on the distribution of λ2 (X(G, S)) and conclude from these a strengthened version (Corollary 3) of the following theorem of ... complement of T By the reasoning above, the average of the the electronic journal of combinatorics 11 (2004), #R62 operators R(g) on the space N is zero and the proof may proceed by applying the tail...
Ngày tải lên: 07/08/2014, 08:20
Báo cáo toán học: "A Simple Proof of the Aztec Diamond Theorem" potx
... define a path τi from the center of the left-hand edge of the ith row to the center of the right-hand edge of the ith row Namely, each step of the path is from the center of a domino edge (where ... 12 (2005), #R18 Theorem 2.3 (Aztec diamond theorem) The number of domino tilings of the Aztec diamond of order n is 2n(n+1)/2 Remark: The proof of Proposition 2.1 relies on the recurrence relation ... journal of combinatorics 12 (2005), #R18 Proposition 2.2 There is a bijection between the set of domino tilings of the Aztec diamond of order n and the set of n-tuples (π1 , , πn ) of large...
Ngày tải lên: 07/08/2014, 08:22
Báo cáo toán học: "An entropy proof of the Kahn-Lov´sz theorem a" ppsx
... proof of the Kahn-Lov´sz theorem a The entropy proof of the Kahn-Lov´sz theorem is complicated by the fact that there can a be edges of the graph (and a fixed matching) amongst the neighbors of ... understanding our proof of the Kahn-Lov´sz, which we present in Section a Radhakrishnan’s proof This section presents the entropy proof of Radhakrishnan of Br`gman’s theorem, which e is as follows Theorem ... The original proof of Kahn and Lov´sz was never published, see [3] Friedland’s proof a is based on an extension of Schrijver’s [10] proof of the Br`gman inequality A short proof, e deducing the...
Ngày tải lên: 08/08/2014, 12:23
Đề tài " Proof of the Lov´asz conjecture " docx
... 2004 In the summer 2005 an alternative proof of Theorem 2.6 appeared in the preprint [19], and a proof of Conjecture 2.5 was announced by C Schultz Proof of Theorem 1.3 (Lov´sz conjecture) .The case ... and all n 2.3 Completion of the sketch of the proof of the Lov´sz conjecture Cona sider one of the two maps ι : K2 → C2r+1 mapping the edge to the Z2 -invariant edge of C2r+1 Clearly, ι is Z2 ... differentials leads to the proof of the Lov´sz conjecture for the case of even k as well a The results of this paper were announced in [1], where no complete proofs were given The reader is referred...
Ngày tải lên: 06/03/2014, 08:21
Aesthetic Analysis of Proofs of the Binomial Theorem pptx
... immediacy (Bhaskara’s one word proof of the Pythagorean Theorem) and others by the element of surprise in how their pieces fit together (Euclid’s proof of the Pythagorean Theorem) In this paper I propose ... a bit on the preparation of the beholder A proof which is not understood will not produce the aha! reaction Of the proofs given for the binomial theorem the induction proof and the proof using ... of the proofs The induction proof suggests the utility of recurrences It also gives one of the most basic examples of an essential proof technique As such it opens vistas on many parts of mathematics...
Ngày tải lên: 16/03/2014, 18:20
Đề tài " A proof of the Kepler conjecture " pdf
... proof of the main theorem of the chapter A PROOF OF THE KEPLER CONJECTURE 1089 Proof of Theorem 2.9 The rules defining the Q-system specify a uniquely determined set of simplices The proof that they ... structure of the proof Statement of theorems Basic concepts in the proof Logical skeleton of the proof Proofs of the central claims Construction of the Q-system 2.1 Description of the Q-system ... paper Here, we describe the top-level outline of the proof and give references to the sources of the details of the proof An expository account of the proof is contained in [Hal00] A general reference...
Ngày tải lên: 22/03/2014, 20:20
Đề tài " A quantitative version of the idempotent theorem in harmonic analysis " docx
... complete discussion of the theorem When G is finite the idempotent theorem gives us no information, since M(G) consists of all functions on G, as does the coset ring The purpose of this paper is ... s-homomorphism then we say that φ is a Freiman s-isomorphism and write A ∼s A = The main argument In this section we derive Theorem 1.3 from Lemma 3.1 below The proof of this lemma forms the heart of the ... which is equivalent to the lower bound on the size of S ∧ S that we claimed We move on now to one of the more technical aspects of the theory of Bourgain systems, the notion of regularity Definition...
Ngày tải lên: 22/03/2014, 20:21
Báo cáo toán học: "A Short Proof of the Rook Reciprocity" pps
... is, and the purpose of this note is to provide such a proof The knowledgeable reader will recognize that the main idea is borrowed from [4] Proof Observe that d (−1) R(B; ... take each other in the final configuration By inclusion-exclusion, we see that the resulting configurations in which the set S of rooks on B is nonempty cancel out of the above sum, because they are ... x extra rows to [d] × [d] Then rk (x + d − k)d−k is the number of ways of first placing k rooks on B and then placing d − k more rooks anywhere (i.e., on B, B or on the extra rows) such that no...
Ngày tải lên: 07/08/2014, 06:20
Báo cáo toán học: " A Purely Combinatorial Proof of the Hadwiger Debrunner (p, q) Conjectur" docx
... every one of our original polytopes will have to contain a proportion g of our points This concludes our proof of the second lemma Proof of Lemma If one of our polytopes has hM clones, then the fact ... simple proof of Helly’s Theorem in one dimension We digress to give this proof Lemma 3A Given a set of closed finite intervals on a line, if any two meet they all meet (The one dimensional Helly Theorem. ) ... Wegner’s Theorem (which is essentially the contents of the two observations in the the electronic journal of combinatorics (no 2) (1997), #R1 proof of this remark), was used It does not affect the...
Ngày tải lên: 07/08/2014, 06:22
Báo cáo toán học: " Proof of the Alon-Tarsi Conjecture for n = 2r p" docx
... if there exists g ∈ G such that Lg = M The orbit LG of L under G is the electronic journal of combinatorics (1998) #R28 the G-isotopy class of L The G-autotopism group in G Clearly AG(L) of L ... for any L of order p and any g ∈ G Let R be any set of representatives of the orbits of G in FDLS(p), and let S be a set of representatives of those orbits of size not divisible by p Then fdels(p) ... the truth of the extended conjecture is still unknown for n = 9, the first even value of n which is not of the form given in Corollary is 50, whereas the previous first unknown case of the original...
Ngày tải lên: 07/08/2014, 06:22
Báo cáo toán học: "A Proof of the Two-path Conjecture" pps
... decompose H By the theorem of Thomason, there is another Hamiltonian decomposition C1 , C2 of H with e in C1 and f in C2 Now we reverse our steps Restore the vertices of degree and remove the edges ... path of length n For example, the complete graph K4 is an edge-disjoint union of two paths of length 3, each path meeting the other in four vertices The cycle C6 is the edge-disjoint union of two ... is not a vertex of X, then we replace the edge xn−1 xn with the edge yk+1x0 to create a third path of length n If yk+1 = xi for some i, then we replace the edge xi xi−1 with the edge yk+1x0 to...
Ngày tải lên: 07/08/2014, 06:23
Báo cáo toán học: "A Concise Proof of the Littlewood-Richardson Rule" pdf
... The Details Let P denote the set of nonnegative integer sequences of the form λ = (λ1 ≥ λ2 ≥ · · ·) with finitely many nonzero terms; i.e., the set of partitions We let Pn denote the set of ... and bi free k + 1’s in row i of T , then there should be bi free k’s and free k + 1’s in row i of σk (T ) In the following, T≥j denotes the subtableau of T formed by the entries in columns j, j ... extension of the Littlewood-Richardson rule [Z] Taking the specialization λ = , we obtain the decomposition of sµ/ν into Schur functions; it is simpler than the traditional formulation of the Littlewood-Richardson...
Ngày tải lên: 07/08/2014, 06:23
Báo cáo toán học: "A Combinatorial Proof of the Sum of q-Cubes" pptx
... about a proof described to him by N.M Ferrers The Ferrers shape of a partition is an array of boxes, left justified, in which the number of boxes in the first row is equal to the size of the first ... that the set S consists of pairs of partitions with no primed parts In the definition of φ−1 when there is a primed integer in the image, we consider only the value of the integer and ignore the ... develop q-analogues of those theorems To the best of our knowledge, there exist no combinatorial proofs of q-analogues for powers greater than three the electronic journal of combinatorics 11...
Ngày tải lên: 07/08/2014, 08:20
Báo cáo toán học: "A positive proof of the Littlewood-Richardson rule using the octahedron recurrence" pot
... three of them Let HIVEν denote the set of hives dec dec λµ of size n such that • the lower left entry is zero • the differences on the Northwest side of the hive give λ • the differences on the Northeast ... vertex The vertices of the honeycomb then correspond to the linear regions in the hive The rhombus inequalities on the hive, reinterpreted, state that the edges of the honeycomb are of nonnegative ... the rest of the strip Proposition In the hive ring, bλbωi = bλ+π π∈{0,1} n , π=i λ+π ∈ Zn dec In other words, the hive ring obeys the Pieri rule” Proof Let h be a hive with differences λ on the...
Ngày tải lên: 07/08/2014, 08:20
Báo cáo toán học: "A Combinatorial Proof of the Log-concavity of a famous sequence counting permutations" potx
... length is quadratic in terms of the length of the input objects is shown to be log-concave The proof of our claim 2.1 The outline of the proof It is easy to see that the sequence (ak )0≤k≤m is ... , and therefore, it implies the existence of the maps fn,k,l for k < l − 2 That will complete the induction step of our proof 2.2 The details of the proof It is time that we carried out the strategy ... strategy to prove Theorem 2.1 that we discussed in the previous subsection the electronic journal of combinatorics 11(2) (2005), #N2 The smallest value of n for which the domains of the maps fn,k,l...
Ngày tải lên: 07/08/2014, 08:22
Báo cáo toán học: "Proof of an intersection theorem via graph homomorphisms" docx
... can present the proof of the theorem Proof: First note that if p = 1/2 then µp is the uniform measure and the theorem is trivial because if a vector in {0, 1}n belongs to I then the antipodal ... that maps an arc of length p to and the complement to 0.) Hence α(Gn ) ≤ α(H n ) = α(H) = p ¯ ¯ ¯ This completes the proof of the theorem ¾ the electronic journal of combinatorics 13 (2006), #N6 ... Safra, On the importance of being biased (1.36 hardness of approximating Vertex-Cover) Annals of Mathematics, to appear Proc of 34th STOC, 2002 [2] P Erd˝s, C Ko, R Rado, Intersection theorems...
Ngày tải lên: 07/08/2014, 13:21
Báo cáo toán học: "Orthogonal art galleries with holes: a coloring proof of Aggarwal’s Theorem" potx
... to see the entire interior of P It is worth pointing out that this result provides an alternate short proof of Aggarwal’s theorem, as we shall discuss in Subsection 2.1 The proof of Theorem ... combining all the above observations, the thesis of Theorem 1.5 follows the electronic journal of combinatorics 13 (2006), #R20 Final remarks The general case of the sufficiency of n+h vertex guards ... sufficient The upper bound of the preceding theorem is better than O’Rourke’s bound of (n+2h)/4 when the number of holes h is large This is because n, the total number of vertices, includes the vertices...
Ngày tải lên: 07/08/2014, 13:21
Báo cáo toán học: "Proof of the Razumov–Stroganov conjecture for some infinite families of link patterns" pdf
... facts: Theorem of [9] The components of Ψn are homogeneous polynomials of total degree n(n − 1), and of partial degree at most n − in each variable zi Theorem of [9] The entries Ψn,π of the groundstate ... ANR-05BLAN-0029-01 Appendix A Proof of symmetry under interchange of spectral parameters The purpose of this appendix is to provide an explicit proof of the symmetry of the partition function of weighted plane ... originating from one of the sides of length c and ending at the other, see Fig (ii), which simply follow two types of tiles out of the three One can replace the local Boltzmann weights of the tiles with...
Ngày tải lên: 07/08/2014, 13:21