Results 51 to 60 of about 1,655,330 (212)
A Sequential Quadratic Numerical Optimization Technique to Compute Critical Flutter Speeds
International Journal for Numerical Methods in Engineering, Volume 127, Issue 17, 15 September 2026.ABSTRACT A stable sequential quadratic numerical optimization technique is proposed to compute critical flutter speeds without resorting to complex algebra. The solution of the traditional eigenproblem stated in the frequency domain, and whose complex conjugate eigenvalues provide insights on the stability of the dynamic aeroelastic response, is ...
Alfredo R. de Faria
wiley +1 more source
Politopo de Birkhoff acíclico [PDF]
, 2011 Doutoramento em MatemáticaNeste trabalho estabelece-se uma interpreta c~ao geom etrica, em termos da teoria dos grafos, para v ertices, arestas e faces de uma qualquer dimens~ao do politopo de Birkho ac clico, Tn = n(T), onde T e uma arvore com ...
Costa, Liliana Manuela Gaspar Cerveira da
core
The Pascal Matrix, Commuting Tridiagonal Operators and Fourier Algebras [PDF]
We consider the (symmetric) Pascal matrix, in its finite and infinite versions, and prove the existence of symmetric tridiagonal matrices commuting with it by giving explicit expressions for these commuting matrices.
Zurrian, Ignacio, Casper, W. Riley
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Dimensional Synthesis for Emulating Nonlinear Disclination Dynamics
Nanophotonics, Volume 15, Issue 17, 11 September 2026.(a) Intensity distributions of the 2D disclination lattice under corner‐site excitation in the linear (a1), weakly nonlinear (a2), and strongly nonlinear (a3) regimes. (b) Corresponding one‐dimensional synthesized lattices (1DSLs) obtained through Lanczos mapping under the same nonlinear regimes.
Junqian Wang +5 more
wiley +1 more source
MathematicsThis paper focuses on the inverse extremal eigenvalue problem (IEEP) and a special inverse singular value problem (ISVP). First, a bordered tridiagonal matrix is constructed from the extremal eigenvalues of its leading principal submatrices and an ...
Hubert Pickmann-Soto +3 more
doaj +1 more source
Fine Spectra of Symmetric Toeplitz Operators
Abstract and Applied Analysis, 2012 The fine spectra of 2-banded and 3-banded infinite Toeplitz matrices were examined by several authors. The fine spectra of n-banded triangular Toeplitz matrices and tridiagonal symmetric matrices were computed in the following papers: Altun, “On the fine
Muhammed Altun
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G-tridiagonal majorization on Mn,m
, 2021 For X, Y ∈ M n,m , it is said that X is g-tridiagonal majorized by Y (and it is denoted by X ≺gt Y) if there exists a tridiagonal g-doubly stochastic matrix A such that X = AY. In this paper, the linear preservers and
Sabzvari, Mahdi +5 more
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Results in Applied MathematicsThis paper presents two fast numerical algorithms for solving opposite-bordered tridiagonal Toeplitz linear systems. Both algorithms are designed to solve a system of n equations in linear time.
Hcini Fahd
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On an inverse formula of a tridiagonal matrix [PDF]
Operators and Matrices, 2012 In this article, the author considers the inverse \(Z_n=(z_{ij})\) of \(Y_n^{-1}\) of a general \(n\times n\) tridiagonal matrix \[ Y_n=(y_{ij})=\begin{pmatrix} \alpha_1 & \gamma_1 & 0 & \cdots & 0 \\ \beta_2 & \alpha_2 & \gamma_2 & \ddots & \vdots \\ 0 & \beta_3 & \ddots & \ddots & 0 \\ \vdots & \ddots & \ddots & \ddots & \gamma_{n-1} \\ 0 & \cdots ...
openaire +2 more sources
Methane Emissions From U.S. Lakes Dominated by Ebullition, Shallow Zones, and Anthropogenic Drivers
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract Lakes are globally important sources of atmospheric methane (CH4), yet a process‐based understanding of their emissions and drivers at regional scales remains limited. Here we developed and applied a one‐dimensional lake model to 42,948 natural lakes across the contiguous United States (CONUS).
Chunqi Shen, Peter A. Raymond
wiley +1 more source