Search Results - subject:"Subspaces."

Did you mean: subject:"subspace." (133 results)

Successive direction extraction for estimating the central subspace in a multiple-index regression

Yin, Xiangrong; Li, Bing; Cook, R. Dennis - In: Journal of Multivariate Analysis 99 (2008) 8, pp. 1733-1757

In this paper we propose a dimension reduction method for estimating the directions in a multiple-index regression based on information extraction. This extends the recent work of Yin and Cook [X. Yin, R.D. Cook, Direction estimation in single-index regression, Biometrika 92 (2005) 371-384] who...

Persistent link: https://www.econbiz.de/10005160321

Chaotic expansion of powers and martingale representation (v1.5)

Jamshidian, Farshid - EconWPA - 2005

This paper extends a recent martingale representation result of [N-S] for a Levy process to filtrations generated by a rather large class of semimartingales. As in [N-S], we assume the underlying processes have moments of all orders, but here we allow angle brackets to be stochastic. Following...

Persistent link: https://www.econbiz.de/10005556719

Decay rate and decoherence control in coupled dissipative cavities

Bosco de Magalhães, A.R.; Mokarzel, S.G.; Nemes, M.C.; … - In: Physica A: Statistical Mechanics and its Applications 341 (2004) C, pp. 234-250

We give a detailed account of the derivation of a master equation for two-coupled cavities in the presence of dissipation. The analytical solution is presented and physical limits of interest are discussed. Firstly, we show that the decay rate of initial coherent states can be significantly...

Persistent link: https://www.econbiz.de/10010871676

Shift reducing subspaces and irreducible-invariant subspaces generated by wandering vectors and applications

Kubrusly, Carlos S.; Levan, Nhan - In: Mathematics and Computers in Simulation (MATCOM) 65 (2004) 6, pp. 607-627

We introduce the notions of elementary reducing subspaces and elementary irreducible-invariant subspaces—generated from … characterizations of shift reducing subspaces and shift irreducible-invariant subspaces, as well as a new decomposition of H into … orthogonal sum of elementary reducing subspaces. Applications of elementary reducing subspaces to wavelet expansion, and of …

Persistent link: https://www.econbiz.de/10011050347

A wavelet “time-shift-detail” decomposition

Levan, N.; Kubrusly, C.S. - In: Mathematics and Computers in Simulation (MATCOM) 63 (2003) 2, pp. 73-78

) in terms of reducing subspaces of the dilation-by-2 shift operator. …

Persistent link: https://www.econbiz.de/10011050660

Indication of a stability loss in the continuation of invariant subspaces

Liberda, Ondřej; Janovský, Vladimír - In: Mathematics and Computers in Simulation (MATCOM) 61 (2003) 3, pp. 517-524

invariant subspaces (IS) of the relevant linearized states such that they would contain all unstable and central modes. The …

Persistent link: https://www.econbiz.de/10011050685

Computing tall skinny solutions of AX−XB=C

Brandts, Jan - In: Mathematics and Computers in Simulation (MATCOM) 61 (2003) 3, pp. 385-397

, with k≪n. This type of Sylvester equation plays an important role in the computation of invariant subspaces when block …

Persistent link: https://www.econbiz.de/10011050901

First and second order rotatability of experimental designs, moment matrices, and information surfaces

Draper, N.; Gaffke, N.; Pukelsheim, F. - In: Metrika 38 (1991) 1, pp. 129-161

Persistent link: https://www.econbiz.de/10005155834

A unilateral shift setting for the fast wavelet transform

Pham, Joseph N.Q. - In: Mathematics and Computers in Simulation (MATCOM) 52 (2000) 5, pp. 361-379

Wavelets are a basis for L2(R) and the structure of the subspaces involved in a wavelet decomposition of L2(R) are well … l2(Z) is commonly referred to as the fast wavelet transform (FWT). In this paper, we describe the structure of subspaces …

Persistent link: https://www.econbiz.de/10010749433

On third order rotatability

Draper, Norman; Pukelsheim, Friedrich - In: Metrika 41 (1994) 1, pp. 137-161

Persistent link: https://www.econbiz.de/10005598718