Báo cáo toán học: "On a Class of Constant Weight Codes" pptx

... follows that the polynomial P (X)=(X + x)(X + x)(X + y)(X + y) On a Class of Constant Weight Codes Mihai Caragiu Institute of Mathematics Bucharest and Department of Mathematics, Pennsylvania State ... of all the rows of the remaining matrix can be seen (by replacing each occurrence of a −1 with 0) as a nonlinear code of length n =4t −1havingaconstantweight[n/2] = 2t...

Ngày tải lên: 07/08/2014, 06:20

... hyperplane of ∆ with deepest point x. If A is a convex subspace of diameter δ of ∆ and H A is a hyperplane of A, then the set of points of ∆ at distance at most n −δ from H A is a hyperplane of ∆, ... respectively maxes, of ∆. The points and lines contained in a convex subspace of diameter δ ≥ 2 define a dual polar space of rank δ. In particular, the points...

Ngày tải lên: 07/08/2014, 21:21

... University of South China, Hengyang, Hunan 421001, People’s Republic of China Full list of author information is available at the end of the article Abstract In this paper, we consider the rule of trajectory ... RESEARCH Open Access On a class of second-order nonlinear difference equation Li Dongsheng 1* , Zou Shuliang 1 and Liao Maoxin 2 * Correspondence: lds1010@sina. com 1...

Ngày tải lên: 20/06/2014, 22:20

... C. Evans, Partial Diff. Equations, American Math. Society, 1998. 5. C. Vargas an d M. Zuluaga, On a Nonlinear Dirichlet Problem Type at Resonance and Bifurcation, Partial Differential Equations, ... Elliptic Equations on an Unbounded Domain Hoang Quoc Toan Fa culty of Math., Mech. and Inform. Vietnam National University, 334 Nguyen Trai, Hanoi, Vietnam Received Ma y 12, 2004 Revised August...

Ngày tải lên: 06/08/2014, 05:20

... Kostochka ∗ University of Illinois at Urbana–Champaign, Urbana, IL 61801 and Institute of Mathematics, Novosibirsk 630090, Russia kostochk@math.uiuc.edu Submitted: April 10, 2002; Accepted: August ... the ideas of Erd˝os, Rubin, and Taylor). A vertex t-coloring of a hypergraph H is panchromatic if each of the t colors is used on every edge of G. Thus, an ordinary 2-coloring is...

Ngày tải lên: 07/08/2014, 06:23

... Buratti Peter Horak University of Washington Tacoma, WA 98402 horak@u.washington.edu Alexander Rosa McMaster University Hamilton, Ontario, Canada rosa@mcmaster.ca Submitted: Apr 9, 2008; Accepted: Jan 21, ... the sum of a j s must be at least as large as the g.c.d. (A J ) − 1 where A J contains q and all a i s that are not in J. The necessity of the above conditions can be shown...

Ngày tải lên: 07/08/2014, 21:21

... Cops and Robbers Game Noga Alon ∗ Tel Aviv University and Institute for Advanced Study, Princeton nogaa@tau.ac.il Abbas Mehrabian Department of Combinatorics and Optimization University of Waterloo amehrabian@uwaterloo.ca Submitted: ... Waterloo amehrabian@uwaterloo.ca Submitted: Oct 11, 2010; Accepted: Jan 11, 2011; Published: Jan 19, 2011 Mathematics S ubject Classification: 05C57 Abstra...

Ngày tải lên: 08/08/2014, 12:23

... discussions with Eva Czabarka, Ida Kantor, Gyula O.H. Ka t ona, Nathan Lemons, Bal´azs Patk´os, L´aszl´o Sz´ekely, and Jacques Verstra¨ete. The author thanks the NSF for funding her and IPAM for hosting ... K. Majindar. On the parameters and intersection of blocks of balanced incomplete block designs. Ann. Math. Statist., 33:1200–1205, 1962. [12] D. McCarthy and S. A. Vanstone. On the st...

Ngày tải lên: 08/08/2014, 14:22

... totally dyadic representation A. A dyadic oriented matriod is dyadic of order k if it has a totally dyadic representation A with full row rank and with the property that for each pair of adjacent ... Louisville. scobee@louisville.edu Submitted: January 7, 1999; Accepted: March 30, 1999 Abstract A rational matrix is totally dyadic if all of its nonzero subdeterminants are in {±2...

Ngày tải lên: 07/08/2014, 06:20

... interleaved before data modulation. A block interlea- ver used as channel interleaver in the simulation is of size 2a and 2b block interleaver, where a and b are the maximum allowable integers for a ... their waveforms within the OFDM/TDM frame and cause a higher-order spec- tral spreading. However, a better PSD of conventional OFDM is achieved at a cost of higher PAPR and...

Ngày tải lên: 20/06/2014, 21:20