共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
For a simplicial complex X and a field K, let .It is shown that if X,Y are complexes on the same vertex set, then for k?0
3.
For each integer k≥3, we find all maximal intervals Ik of natural numbers with the following property: whenever the number of elements in every maximal chain in a finite partially ordered set P lies in Ik, then P contains k pairwise disjoint maximal antichains. All such Ik are of the form
4.
Ngoc Gioan Jean Pagnon 《Indagationes Mathematicae》2004,15(1):101-114
In the article [Spa1], N. Spaltenstein has established a bijection between the irreducible components of χ, the space of full flags fixed by a nilpotent element χ ? M(n, k), where k is an algebraically closed field, and the standard tableaux associated to the Young diagram of χ. In this present work we determine, when χ is of hook type, for each irreducible component X of χ, the unique Schubert cell X of the full flag manifold = (V) (where V is vector space of dimension n over k), such that X ∩ X is a dense subspace in X. This result will allow us to optimize the computation of χ and when k = is the complex field, to see that the graph resolution of the partition (2, 1, …, 1) of n is related to the Dynkin diagram of sl(n, ). 相似文献
5.
6.
Let A1,A2 be standard operator algebras on complex Banach spaces X1,X2, respectively. For k?2, let (i1,…,im) be a sequence with terms chosen from {1,…,k}, and define the generalized Jordan product
7.
Jiang Ye 《Journal of Mathematical Analysis and Applications》2007,327(1):695-714
Let be a sequence of i.i.d. random variables with EX=0 and EX2=σ2<∞. Set , Mn=maxk?n|Sk|, n?1. Let r>1, then we obtain
8.
9.
Shaun Cooper 《Journal of Number Theory》2003,103(2):135-162
Let rk(n) denote the number of representations of an integer n as a sum of k squares. We prove that for odd primes p,
10.
Yuexu Zhao 《Journal of Mathematical Analysis and Applications》2008,339(1):553-565
Let X1,X2,… be a strictly stationary sequence of ρ-mixing random variables with mean zeros and positive, finite variances, set Sn=X1+?+Xn. Suppose that , , where q>2δ+2. We prove that, if for any 0<δ?1, then
11.
Ohad Giladi 《Journal of Functional Analysis》2011,260(1):164-194
It is shown that if (X,‖⋅X‖) is a Banach space with Rademacher cotype q then for every integer n there exists an even integer such that for every we have
(1) 相似文献
12.
Fernanda Botelho James E. Jamison 《Journal of Mathematical Analysis and Applications》2011,381(2):821-832
For a Banach space E and a compact metric space (X,d), a function F:X→E is a Lipschitz function if there exists k>0 such that
13.
14.
15.
16.
Let k be a positive integer and G be a connected graph. This paper considers the relations among four graph theoretical parameters: the k-domination number γk(G), the connected k-domination number ; the k-independent domination number and the k-irredundance number irk(G). The authors prove that if an irk-set X is a k-independent set of G, then , and that for k?2, if irk(G)=1, if irk(G) is odd, and if irk(G) is even, which generalize some known results. 相似文献
17.
Let X1,X2,…,Xq be a system of real smooth vector fields satisfying Hörmander's rank condition in a bounded domain Ω of Rn. Let be a symmetric, uniformly positive definite matrix of real functions defined in a domain U⊂R×Ω. For operators of kind
18.
K.V. Storozhuk 《Journal of Mathematical Analysis and Applications》2007,332(2):1365-1370
If (Tt)t?0 is a bounded C0-semigroup in a Banach space X and there exists a compact subset K⊆X such that
19.
A mixed hypergraph is a triple H=(X,C,D), where X is the vertex set and each of C, D is a family of subsets of X, the C-edges and D-edges, respectively. A proper k-coloring of H is a mapping c:X→[k] such that each C-edge has two vertices with a common color and each D-edge has two vertices with distinct colors. A mixed hypergraph H is called circular if there exists a host cycle on the vertex set X such that every edge (C- or D-) induces a connected subgraph of this cycle.We suggest a general procedure for coloring circular mixed hypergraphs and prove that if H is a reduced colorable circular mixed hypergraph with n vertices, upper chromatic number and sieve number s, then
20.
Walks and the spectral radius of graphs 总被引:1,自引:0,他引:1
Vladimir Nikiforov 《Linear algebra and its applications》2006,418(1):257-268
Given a graph G, write μ(G) for the largest eigenvalue of its adjacency matrix, ω(G) for its clique number, and wk(G) for the number of its k-walks. We prove that the inequalities