Results 81 to 90 of about 2,339 (216)

Effects of Culture Aeration and the C:N Ratio on Propagule Production by Submerged Cultivation of Clonostachys rosea and Its Antifungal Metabolite Profiling

open access: yesMicrobiologyOpen, Volume 14, Issue 6, December 2025.
Optimized submerged fermentation of Clonostachys rosea under high aeration enhances production of submerged conidia and microsclerotia. Formulated propagules and antifungal metabolites, including sorbicillinoids, effectively control tomato gray mold, offering a promising strategy for biocontrol product development.
Gabriel Moura Mascarin   +3 more
wiley   +1 more source

Lightweight MDS Generalized Circulant Matrices (Full Version) [PDF]

open access: yes, 2017
In this article, we analyze the circulant structure of generalized circulant matrices to reduce the search space for finding lightweight MDS matrices. We first show that the implementation of circulant matrices can be serialized and can achieve similar ...
Siang Meng Sim, Meicheng Liu
core  

On circulant matrices with Fibonacci quaternions [PDF]

open access: yesNotes on Number Theory and Discrete Mathematics
In literature, there exist many papers that compute determinants and some kinds of norms of circulant matrices involving some well-known number sequences.
Seda Yamaç Akbıyık   +3 more
doaj   +1 more source

An Optimal Preconditioned MINRES Method for Symmetrized Multilevel Block Toeplitz Systems With Applications

open access: yesNumerical Linear Algebra with Applications, Volume 32, Issue 6, December 2025.
ABSTRACT In this work, we propose a novel preconditioned minimal residual method for a class of real, nonsymmetric multilevel block Toeplitz systems, which generalizes an ideal preconditioner established in [J. Pestana. Preconditioners for symmetrized Toeplitz and multilevel Toeplitz matrices. SIAM Journal on Matrix Analysis and Applications, 40(3):870–
Grigorios Tachyridis, Sean Y. Hon
wiley   +1 more source

Some bounds for the spectral norms of some circulant matrices with generalized Jacobsthal–Lucas numbers

open access: yesMathematics Open
The purpose of this paper is to investigate the bounds of the spectral norms of some circulant matrices whose elements are a generalization of Jacobsthal–Lucas numbers called bi-periodic Jacobsthal–Lucas numbers by three different ways.
Sukran Uygun
doaj   +1 more source

Determinants of the RFMLR Circulant Matrices with Perrin, Padovan, Tribonacci, and the Generalized Lucas Numbers

open access: yesJournal of Applied Mathematics, 2014
The row first-minus-last right (RFMLR) circulant matrix and row last-minus-first left (RLMFL) circulant matrices are two special pattern matrices. By using the inverse factorization of polynomial, we give the exact formulae of determinants of the two ...
Zhaolin Jiang, Nuo Shen, Juan Li
doaj   +1 more source

Low‐Rank Geostatistical Inversion for Spatiotemporal Heterogeneity of Aquitard Hydraulic Parameters

open access: yesWater Resources Research, Volume 61, Issue 12, December 2025.
Abstract Many hydrogeological processes are intricately linked to both the spatial heterogeneity and temporal dynamics of the involved parameters. The variability in hydrogeological parameters across both space and time domains is defined as the spatiotemporal heterogeneity.
Chao Zhuang   +8 more
wiley   +1 more source

A Note on the Square Roots of a Class of Circulant Matrices

open access: yesJournal of Applied Mathematics, 2013
We prove that any k-circulant matrix and any even order skew k-circulant matrix are diagonalizable for any k∈ℂ. Then, we propose two algorithms for computing the square roots of the k-circulant matrix and the skew k-circulant matrix, respectively.
Ying Zhang, Huisheng Zhang, Guoyan Chen
doaj   +1 more source

Truncated Floquet–Bloch transform for computing the spectral properties of large finite systems of resonators

open access: yesTransactions of the London Mathematical Society, Volume 12, Issue 1, December 2025.
Abstract In subwavelength physics, a challenging problem is to characterise the spectral properties of finite systems of subwavelength resonators. In particular, it is important to identify localised modes as well as bandgaps and associated mobility edges.
Habib Ammari   +2 more
wiley   +1 more source

Circulant Matrices and Time-series Analysis [PDF]

open access: yes
This paper sets forth some of the salient results in the algebra of circulant matrices which can be used in time-series analysis. It provides easy derivations of some results that are central to the analysis of statistical periodograms and empirical ...
Stephen Pollock
core  

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