[PDF] Top 20 vol16_pp162-170. 116KB Jun 04 2011 12:05:57 AM

... Being the inverse of a unit diagonal upper triangular strictly totally positive matrix, the matrixB has the formB =D∗RDˆ ∗ where ˆRis a unit diagonal upper triangular strictly totally po[r] ... Lihat dokumen lengkap

... In 1996 Nylen gave a method for computation of minimum rank for a tree, sub- sequently improved by Johnson and Leal-Duarte [11], Johnson and Saiago [14], and others. Convenient algorithms for computation of the minimum ... Lihat dokumen lengkap

... This paper presents an algorithm to compute the first order analytical deriva-tives of both eigenvalues and eigenvectors for such a general non-defective matrix.. It is assumed that all [r] ... Lihat dokumen lengkap

... A classic inequality for singular values of a matrixsum, including its equality case, is used to study how the energy of a graph changes when edges are removed.. One sharp bound and one [r] ... Lihat dokumen lengkap

... LetAbe a strictly lower k-banded matrix and letX be a generalized inverse ofA.In Theorem 2.2 we obtained upper and lower bounds for the rank of an upper-right submatrix ofX.We now show[r] ... Lihat dokumen lengkap

... σ). Proposition 2.5 shows that in fact (iv) and (v) are equivalent. Thus, it remains to prove that (iv) = ⇒ (vi). So, assume (iv) holds. As it follows from the canonical forms of pairs of real symmetric or skewsymmetric ... Lihat dokumen lengkap

... Since the Jordan canonical form ofJti ni isrni, ti, matrixA is similar to , which is obviously equal to the product of two commuting nilpotent matrices  Thus alsoAcan be written as[r] ... Lihat dokumen lengkap

... Another collection of potentially nilpotent but not spectrally arbitrary sign patterns can be obtained by following an argument of [4] and noting that any reducible sign pattern having a[r] ... Lihat dokumen lengkap

... We propose bounds for the spectrum and invertibility conditions which in the finite case improve the Hadamard criterion for matrices that are ”close” to block triangular matrices.. Moreo[r] ... Lihat dokumen lengkap

... Also, it is proved that the bipartite graph or, equivalently, the zero pattern of a free matrix uniquely determines that of its Moore-Penrose inverse, and this mapping is described expli[r] ... Lihat dokumen lengkap

... Henceforth, we takeGto be a connected graph onn vertices, and we takeX, Y to be nonempty subsets of its vertex set, such thatX=Y, Y .LetL=I−D−1 2 AD− 1 2 be the normalized Laplacian ma[r] ... Lihat dokumen lengkap

... e reduced-rank estimators, f unbiasedness of estimators, g uniqueness of estimators, h equalities of estimators, i additive and block decomposability of estimators, j unrelatedness of e[r] ... Lihat dokumen lengkap

... LetAbe doubly diagonally dominant with max j∈S2∪S3 Rj−tB |bj−t,j−t| Ri0A≤ |ai0i0| for somei0, andB be strictly diagonally dominant, A= As Bru, Pedroche and Szyld studied the resu[r] ... Lihat dokumen lengkap

... Toward these matrices one usually introduces the first row and column as initial conditions for a recurrence relation used for constructing the other entries.. Both this relation and the[r] ... Lihat dokumen lengkap

... Spectrally and inertially arbitrary sign patterns were introduced in [6]. Classes of inertially arbitrary sign patterns were derived by Gao and Shao [7] as well as Miao and Li [13]. In [1], Britz et. al. characterized ... Lihat dokumen lengkap

... 273-288] studied reverse order laws for generalized inverses of multiple matrix products and derived some necessary and sufficient conditions for An{1}An−1{1} · · ·A1{1} ⊆A1A2· · ·An{1}[r] ... Lihat dokumen lengkap

... LetGbe a simple graph onnvertices andGis not isomorphic tonK1.. LetGbe a simple graph onnvertices and letCp be an induced subgraph ofG, where3≤p≤n.[r] ... Lihat dokumen lengkap

... Weighted graph, Generalized Bethe tree, Laplacian matrix, Adjacency matrix, Spectral radius, Algebraic connectivity.. Accepted for publication December 30, 2008.[r] ... Lihat dokumen lengkap

... Thus they are equalities in L and we have equalities for the smallest class for a 2- generated Lie algebra that will support a given solvable length.. These are given in 2.1 with the re[r] ... Lihat dokumen lengkap

... In both cases a proper quantum mechanical description requires the re-definition of the metric to compensate for the introduction of non-Hermitian variables and in the latter an addition[r] ... Lihat dokumen lengkap