[PDF] Top 20 vol21p28-42. 145KB Jun 04 2011 12:06:11 AM

... 1. Introduction. Let A be a ring (or an algebra) with the unit I. Recall that an additive (or a linear) map δ from A into itself is called a derivation if δ(AB ) = δ(A)B + Aδ(B) for all A, B ∈ A. As well known that ... Lihat dokumen lengkap

... where E is a singular matrix. Detailed discussions of the importance of the problem can be found in [11]. Until now, both problems have not been resolved. However, there have been some studies about the ... Lihat dokumen lengkap

... In this paper, we give another proof of this theorem making use of a general result Theorem 3.5 according to which the inverse of an n×n interval matrix can be computed from unique solut[r] ... Lihat dokumen lengkap

... For the induction step in the proof that the conditions are sufficient for completion in the n-by-n case, we partition the partial matrix meeting the necessary conditions into two overla[r] ... Lihat dokumen lengkap

... The path, the complete graph, the cycle, the star and some quasi-star graphs, together with their complement graphs were shown to be determined by their Laplacian spectra [6, 9, 15, 21].[r] ... Lihat dokumen lengkap

... Our goal is to study the minimum semidefinite rank of all outerplanar graphs. Along these lines, it is known that the minimum semidefinite rank of trees on n vertices is n−1 (see [12]), and that for any unicyclic ... Lihat dokumen lengkap

... For the special case of filiform Lie algebras and p–groups of maximal class, similar results have been shown by Bosko in [3], where a special case has been treated. In fact, the reader may compare Proposition 2.3 and ... Lihat dokumen lengkap

... Although there exist close connections between the Bezoutians and polynomials defined in the ELA paper and those in [5], [5] investigated orthogonal polynomials and arbitrary polynomials[r] ... Lihat dokumen lengkap

... example, they often have connections with some structured matrices, such as Hankel, Toeplitz, and Vandermonde matrices, etc., and therefore have a lot of significant char- acteristic properties. A more detailed expansion ... Lihat dokumen lengkap

... By transforming the original system through the computation of Gr¨obner bases of appropriate elimination ideals, we are able to classify all solutions of 1.1 whenn= 2.. Similar computa[r] ... Lihat dokumen lengkap

... In the basis of the mentioned eigenvectors of the harmonic oscillator, this operator has the following matrix representation: Mθ= The union of the setRwith the infinite zero matrix for[r] ... Lihat dokumen lengkap

... The perturbation results of the Drazin inverse of a closed linear operator can be applied to the solu-tion of perturbed linear equasolu-tions and to the asymptotic behavior ofC0-semigrou[r] ... Lihat dokumen lengkap

... bounds and the residual bounds for an approximate solution of (1.1). In addition, Duan [17] proved that (1.1) always has a unique positive definite solution when C = 0. Hasanov [11] obtained that (1.1) has a ... Lihat dokumen lengkap

... INFORMACIÓN ACADÉMICAY LABORAL SECTION I UNIVERSITY OF OXFORD MATHEMATICAL AND PHYSICAL SCIENCES DIVISION MATHEMATICAL INSTITUTE IN ASSOCIATION WITH BRASENOSE COLLEGE UNIVERS[r] ... Lihat dokumen lengkap

... Largely motivated by the research by Parter [20], Genin and Maybee [9], and Wiener [22], on the location and multiplicity of eigenvalues of sign-symmetric ma- trices whose associated graphs are trees, the interest on ... Lihat dokumen lengkap

... Electronic Journal of Linear Algebra ISSN 1081-3810 A publication of the International Linear Algebra Society Volume 21, pp... b λ2 6= 0 and apply the induction hypothesis in Case ii.[r] ... Lihat dokumen lengkap

... 1. Introduction. The concept of n-Lie algebras appeared in two different con- texts [1, 2]. In [1], Nambu introduced n-ary multilinear operations in his description of simultaneous classical dynamics of n particles, and ... Lihat dokumen lengkap

... phisme donn´ee plus haut, cette suite est 2-automatique (au sens de Cob- ham [12]). Cette suite, qui n’est pas ultimement p´eriodique comme d´ej` a indiqu´e, ne peut donc pas ˆetre k-automatique lorsque k n’est ... Lihat dokumen lengkap

... The authors use a recent characterization of the numerical range to obtain several conditions for a symmetric tridiagonal matrix with positive diagonal entries to be positive denite.. P[r] ... Lihat dokumen lengkap

... − 4). (16) Also, because the equation (10) is solvable in Z[ √ 2], there exist triples like { 1, 3, 11 ± 8 √ 2 } , { 1, 3, 32 ± 20 √ 2 } , { 1, 3, 161 ± 112 √ 2 } . Like in Example 10, the third element of these ... Lihat dokumen lengkap