Báo cáo toán học: "Minimum rank of matrices described by a graph or pattern over the rational, real and complex numbers" doc

... minimum rank of a graph over a field F was raised at the 2006 American Institute of Mathematics workshop,“Spectra of Families of Matrices described by Graphs, Digraphs, and Sign Patterns,” and in ... Families of Matrices described by Graphs, Digraphs, and Sign Patterns,” and the authors thank AIM and NSF for their support. the electronic journal...

Ngày tải lên: 07/08/2014, 15:23

... Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. New proofs of Schur-concavity for a class of ... your research in Journal of Inequalities and Applications go to http://www.journalofinequalitiesandapplications.com/authors/instructions/ For information about other SpringerOpen...

Ngày tải lên: 20/06/2014, 21:20

... Rigaku, Tokyo, Japan). The thermal behavior of the as-prepared hydrate samples was analyzed by thermogravimetric analysis [TGA] (DTG-60H, Shimadzu, Kyoto, Japan). For TGA, the samples were heated ... have been synthesized via a hydrothermal method, followed by thermal post-annealing at 500°C for 2 h. The chemical composition of the nanowires was varied, and their morp...

Ngày tải lên: 20/06/2014, 21:20

... develop the billiard algorithm in a more stochastic way. The hard spheres do not move along straight lines but randomly around themselves, and realize in Algorithm 1 a random walk. In Algorithm 2, the ... symmetries of the configuration and using a Gr¨obner basis package. For n =11, 12, 20, 26, the reduction has been made with Mathematica and we also obtain a proof th...

Ngày tải lên: 07/08/2014, 08:20

... planar quadrangulation which has no 2-cycles and has a distinguished face other than the root face, and 2. a quadrangulation of genus g which, after the removal of the interiors of all maximal 4-cycles, ... quadrangulation of genus g and a planar quadrangulation with a distinguished edge. Taking the latter quadrangulation and cutting along all its maximal 2-cyc...

Ngày tải lên: 08/08/2014, 12:23

... and 5¢-ATAGTCGACTTAAACGACAATAACTTG-3¢.Next, the resulting DNA fragment was inserted into BamHI and SalI of pET-24d vector (Novagen), which was modified by attaching a His 6 tag at the N-terminus of the ... 5¢-GGA CAATTACAGATTCAGTGGGAAAG-3¢ (sense, 1815– 1840) and 5¢-CGAGTATACGAAATCGATGTCGTAG- 3¢ (anti sense, 1729–1753) under the same conditions. In the second 5¢ RACE, fi...

Ngày tải lên: 17/03/2014, 23:20

... Hercules, CA, USA). The secondary antibody was detected with a S torm 860Ò (Pharmacia Amersham, Uppsala, Sweden) using a chemi¯uorescent substrate ECF (Pharmacia Amersham). Data analysis was performed ... using IMAGE QUANT Ò software (Pharmacia Amershamm), giving a quantitative measurement of the amount of XI in the cell-free extracts. These data were used with the maximum v...

Ngày tải lên: 31/03/2014, 15:20

... trapped the In adatoms that migrated from the nearby planar GaAs (100) surface, which caused an increase in the InAs local coverage and make the real InAs deposition in the vicinal surface area reached ... to partial strain relaxation inside the QD, E surface is the surface energy associated with increased surface area of the QD, and E edge is the energy associated w...

Ngày tải lên: 22/06/2014, 19:20

... 2(c), the internal states of Agent B and Agent C are shown at the moment they receive Agent A s request. The internal states of Agent B show a high level of fear and moderate levels of pride and ... [7– 11]. Taking these concepts as a basis for the development of technical systems appears to be a very reasonable idea: animals and humans have the capability t...

Ngày tải lên: 21/06/2014, 11:20

... off the diagonal are not zero (we shall call these matrices co-diagonal over R). We define the rank of a matrix over a ring, and show that low rank co- diagonal matrices over Z 6 naturally correspond ... integer. We say, that n ×n matrix A over R has rank 0 if all of the elements of A are 0. Otherwise, the rank over the ring R of matrix A is...

Ngày tải lên: 07/08/2014, 06:20