20 trang
58 lượt xem
3 lượt tải
Presentation reports
Báo cáo khoa học:Even circuits of prescribed clockwise parityWe show that a graph has an orientation under which every circuit of even length
is clockwise odd if and only if the graph contains no subgraph which is, after the
contraction of at most one circuit of odd length, an even subdivision of K2,3. In fact
we give a more general characterisation of graphs that have an orientation under
which every even circuit has a prescribed clockwise parity. Moreover we show that
this characterisation has an equivalent analogue for signed graphs.
Research report, "Some convergence theorems for arrays of two average index of random elements in Banach spaces with integrable conditions on"Collection of research reports best universities honored author. Two. Le Van Dung, a number average convergence theorem for two index array of random elements in Banach spaces with integrable conditions are ... Science (in Latin Scientia, meaning "knowledge "or" understanding ") is the efforts to implement the invention, and increased knowledge of the human understanding of how the operation of the physical world around them. Through controlled methods, scientists use to observe the signs of expression or of the material and unusual nature to collect data, analyze information to explain how it works, there at the phenomenon of things. One...
10 trang
75 lượt xem
4 lượt tải
Báo cáo khoa học:Bounds on the Tur´n density of PG(3, 2) aFor n 2, let PG(n, 2) be the finite projective geometry of dimension n over F2, the field
of order 2. The elements or points of PG(n, 2) are the one-dimensional vector subspaces of
Fn+1
2 ; the lines of PG(n, 2) are the two-dimensional vector subspaces of Fn+1
2 . Each such
one-dimensional subspace {0, x} is represented by the non-zero vector x contained in it.
For ease of notation, if {e0, e1, . . . , en} is a basis of Fn+1
2 and x is an element of PG(n, 2),
then we denote x by a1 . . .as, where x = ea1 +·...
7 trang
41 lượt xem
3 lượt tải
Research report: "Using the activity in pairs and in groups to teach writing in English"Collection of scientific reports of the best universities honor the author: 10. Nguyen Thi Tuong, Using activities in pairs and in groups to teach writing in English ... English (English English) language is a western branch of the German language group in the Indo-European ), were imported to England through the languages of many peoples conquered in the 6th century. Transmitted throughout the English colonialism in the boom period of the British Empire, from the British Isles through Australia, Canada, Hong Kong, New Zealand, the United States and some English becomes "sub-language" most important and increasingly more people learn to...
4 trang
163 lượt xem
38 lượt tải
Báo cáo khoa học: An answer to a question by Wilf on packing distinct patterns in a permutationThere has been significant interest in the topic of finding permutations containing
many copies of the same pattern. In this paper, we will be concerned with the other
extremity, permutations containing as many different patterns as possible.
At the Conference on Permutation Patterns, Otago, New Zealand, 2003, Herb Wilf
asked how many distinct patterns could be contained in a permutation of length n. Based
on empirical evidence, it seemed this number may approach the theoretical upper bound
of 2n. In this paper we enumerate patterns contained in each of a certain class of permutations
to at least establish a lower bound for this function....
4 trang
50 lượt xem
5 lượt tải
Chịu trách nhiệm nội dung: Nguyễn Công Hà. ©2025 Công ty TNHH Tài Liệu trực tuyến Vi Na.
Địa chỉ: 54A Nơ Trang Long, P. Bình Thạnh, TP.HCM - Điện thoại: 0283 5102 888 - Email: info@tailieu.vn
Giấy phép Mạng Xã Hội số: 670/GP-BTTTT cấp ngày 30/11/2015