Results 61 to 70 of about 949,602 (209)

The Moore–Penrose inverse of a partitioned nonnegative definite matrix [PDF]

, 2000
Consider an arbitrary symmetric nonnegative definite matrix A and its Moore–Penrose inverse A+, partitioned, respectively asA=EFF′HandA+=G1G2G2′G4.Explicit expressions for G1, G2 and G4 in terms of E, F and H are given.
Jürgen Groß, Groß, Jürgen
core   +1 more source

Novel Methods for Computing the Moore-Penrose Inverse of Neutrosophic Fuzzy Matrices [PDF]

Neutrosophic Sets and Systems
In this paper, we introduce a method for determining the generalized inverse (g-inverse) and the Moore-Penrose inverse of Neutrosophic Fuzzy Matrices (NFMs), along with the necessary conditions.
R. Jaya, S. Vimala
doaj   +1 more source

Developing Reverse Order Law for the Moore–Penrose Inverse with the Product of Three Linear Operators

Journal of Mathematics, 2021
In this paper, we study the reverse order law for the Moore–Penrose inverse of the product of three bounded linear operators in Hilbert spaces. We first present some equivalent conditions for the existence of the reverse order law ABC†=C†B†A†.
Yang Qi, Liu Xiaoji, Yu Yaoming
doaj   +1 more source

On Selection of Cross‐Section Averages in Non‐Stationary Environments

Journal of Time Series Analysis, EarlyView.
ABSTRACT Information criteria (ICs) have been widely used in factor models to estimate an unknown number of latent factors. It has recently been shown that ICs perform well in Common Correlated Effects (CCE) and related settings when selecting a set of cross‐section averages (CAs) sufficient for the factor space under stationary factors.
Jan Ditzen, Ovidijus Stauskas
wiley   +1 more source

The Moore-Penrose inverse of a free matrix

, 2007
A matrix is free, or generic, if its nonzero entries are algebraically independent.Necessary and sufficient combinatorial conditions are presented for a complex free matrix to have afree Moore-Penrose inverse.
Britz, Thomas
core   +1 more source

Note on an extension of the Moore-Penrose inverse [PDF]

, 1981
The defining equations for the Moore-Penrose inverse of a matrix are extended to give a unique type of generalized inverse for matrices over arbitrary ...
Cline, Randall E.
core   +1 more source

Frequency control of droop‐based low‐voltage microgrids with cobweb network topologies

IET Generation, Transmission & Distribution, 2020
When distributed generation (DG) technologies are implemented in an islanded low‐voltage microgrid (LVMG), the topological architecture directly affects the frequency synchronisability. Especially in cases of high DG penetration, the synchronisability of
Chang Yu, Hong Zhou, Xiaoqing Lu
doaj   +1 more source

Band‐Pass Filtering With High‐Dimensional Time Series. A Synthetic Indicator of the Medium‐to‐Long Run Component of Growth

Journal of Time Series Analysis, EarlyView.
ABSTRACT The paper deals with the construction of a synthetic indicator of economic growth, obtained by projecting a quarterly measure of aggregate economic activity, namely gross domestic product (GDP), into the space spanned by a finite number of smooth principal components, representative of the medium‐to‐long‐run component of economic growth of a ...
Alessandro Giovannelli, Marco Lippi, Tommaso Proietti   +2 more
wiley   +1 more source

On an inequality related to the volume of a parallelepiped

Examples and Counterexamples
The problem of establishing an upper bound for the volume of a parallelepiped is considered by utilizing an original approach involving a skew-symmetric matrix of order four (along with its Moore–Penrose inverse).
Oskar Maria Baksalary, Götz Trenkler
doaj   +1 more source

Feasibility and SNR Performance of Hyperpolarized 129Xe Gas Exchange Imaging Using a Balanced SSFP Sequence

Magnetic Resonance in Medicine, Volume 96, Issue 5, Page 2201-2212, November 2026.
ABSTRACT Purpose To develop a balanced SSFP (bSSFP) sequence for pulmonary 129Xe dissolved‐phase imaging based on a previously described double‐echo sequence facilitating separation into red blood cell and membrane signals, to test its feasibility and compare its SNR performance and imaging results to an analogous FLASH sequence.
Agilo L. Kern, Marcel Gutberlet, Jens M. Hohlfeld, Frank Wacker, Jens Vogel‐Claussen   +4 more
wiley   +1 more source