Results 51 to 60 of about 22,762 (128)

A New High-Order Stable Numerical Method for Matrix Inversion

The Scientific World Journal, 2014
A stable numerical method is proposed for matrix inversion. The new method is accompanied by theoretical proof to illustrate twelfth-order convergence. A discussion of how to achieve the convergence using an appropriate initial value is presented.
F. Khaksar Haghani, F. Soleymani
doaj   +1 more source

RECTANGULAR INPUT-OUTPUT MODELS BY MOORE-PENROSE INVERSE

Rect@, 2014
The official available data must be the primary datasource in economic studies. However, in economic modelling related with supply-use tables this aspect is ignored.
Pereira López, Xesús, Fernández Fernández, Melchor, Carrascal Incera, André   +2 more
doaj  

Extensions of pseudo-Perron-Frobenius splitting related to generalized inverse AT,S(2)

Special Matrices, 2018
We in this paper define the outer-Perron-Frobenius splitting, which is an extension of the pseudo- Perron-Frobenius splitting defined in [A.N. Sushama, K. Premakumari, K.C.
Huang Shaowu, Wang Qing-Wen, Wu Shuxia, Yu Yaoming   +3 more
doaj   +1 more source

Determinantal Representations of the Core Inverse and Its Generalizations with Applications

Journal of Mathematics, 2019
In this paper, we give the direct method to find of the core inverse and its generalizations that is based on their determinantal representations. New determinantal representations of the right and left core inverses, the right and left core-EP inverses,
Ivan I. Kyrchei
doaj   +1 more source

A note on computing the generalized inverse A T,S (2) of a matrix A

International Journal of Mathematics and Mathematical Sciences, 2002
The generalized inverse A T,S (2) of a matrix A is a {2}-inverse of A with the prescribed range T and null space S. A representation for the generalized inverse A T,S (2) has been recently developed with the condition σ (GA| T)⊂(0,∞), where G is a matrix
Xiezhang Li, Yimin Wei
doaj   +1 more source

Complex degenerate metrics in general relativity: a covariant extension of the Moore–Penrose algorithm

European Physical Journal C: Particles and Fields
The Moore–Penrose algorithm provides a generalized notion of an inverse, applicable to degenerate matrices. In this paper, we introduce a covariant extension of the Moore–Penrose method that permits to deal with general relativity involving complex non ...
Arthur Garnier, Emmanuele Battista
doaj   +1 more source

A Review on Large-Scale Data Processing with Parallel and Distributed Randomized Extreme Learning Machine Neural Networks

Mathematical and Computational Applications
The randomization-based feedforward neural network has raised great interest in the scientific community due to its simplicity, training speed, and accuracy comparable to traditional learning algorithms.
Elkin Gelvez-Almeida, Marco Mora, Ricardo J. Barrientos, Ruber Hernández-García, Karina Vilches-Ponce, Miguel Vera   +5 more
doaj   +1 more source

Existence Criteria and Related Relation of the gMP Inverse of Matrices

Mathematics
New characterizations of the gMP inverse are provided by the core part of the core-EP decomposition. We also answer the question as to whether X is the gMP inverse of A under the conditions of R(X)⊆R(A*Ak) or N((Ak)*)⊆N(X).
Sanzhang Xu, Honglin Zou, Kezheng Zuo
doaj   +1 more source

Optimizing the ordering of the Hadamard masks of ghost imaging suitable for the efficient face reconstruction using the max-projection method. [PDF]

Sci Rep, 2023
Zhang H, Du K, Zhao C, Tang J, Si S, Jia W, Xue L, Li Z.   +7 more
europepmc   +1 more source

Linear Ensembles for WTI Oil Price Forecasting

Energies
This paper investigated the use of linear models to forecast crude oil futures prices (WTI) on a monthly basis, emphasizing their importance for financial markets and the global economy.
João Lucas Ferreira dos Santos, Allefe Jardel Chagas Vaz, Yslene Rocha Kachba, Sergio Luiz Stevan, Thiago Antonini Alves, Hugo Valadares Siqueira   +5 more
doaj   +1 more source