Results 11 to 20 of about 144 (139)

Magnetic exchange interactions in binuclear and tetranuclear iron(III) complexes described by spin-flip DFT and Heisenberg effective Hamiltonians. [PDF]

open access: yesJ Comput Chem, 2023
Exchange interactions in polynuclear Fe (III) compounds are derived from ab initio calculations based on a single spin‐flip (1SF) approach. Abstract Low‐energy spectra of single‐molecule magnets (SMMs) are often described by Heisenberg Hamiltonians.
Kotaru S   +3 more
europepmc   +2 more sources

Critical review of 16S rRNA gene sequencing workflow in microbiome studies: From primer selection to advanced data analysis

open access: yesMolecular Oral Microbiology, Volume 38, Issue 5, Page 347-399, October 2023., 2023
Abstract The multi‐batch reanalysis approach of jointly reevaluating gene/genome sequences from different works has gained particular relevance in the literature in recent years. The large amount of 16S ribosomal ribonucleic acid (rRNA) gene sequence data stored in public repositories and information in taxonomic databases of the same gene far exceeds ...
Alba Regueira‐Iglesias   +3 more
wiley   +1 more source

Warped product semi-slant submanifolds in locally conformal Kaehler manifolds

open access: yesPracì Mìžnarodnogo Geometričnogo Centru, 2017
In 1994, in [13], N. Papaghiuc introduced the notion of semi-slant submanifold in a Hermitian manifold which is a generalization of CR- and slant-submanifolds. In particular, he considered this submanifold in Kaehlerian manifolds, [13]. Then, in 2007, V.
Koji Matsumoto
doaj   +1 more source

Examining the production, export, and immediate fate of kelp detritus on open‐coast subtidal reefs in the Northeast Atlantic

open access: yesLimnology and Oceanography, Volume 67, Issue S2, Page S36-S49, November 2022., 2022
Abstract Kelp forests are highly productive coastal habitats and are emerging as important sources of organic matter for other ecosystems. Although their high rates of productivity and detritus release are expected to lead to substantial export of carbon, few studies have actually quantified rates of export or the persistence of detritus.
Dan A. Smale   +3 more
wiley   +1 more source

∗‐Ricci Tensor on α‐Cosymplectic Manifolds

open access: yesAdvances in Mathematical Physics, Volume 2022, Issue 1, 2022., 2022
In this paper, we study α‐cosymplectic manifold M admitting ∗‐Ricci tensor. First, it is shown that a ∗‐Ricci semisymmetric manifold M is ∗‐Ricci flat and a ϕ‐conformally flat manifold M is an η‐Einstein manifold. Furthermore, the ∗‐Weyl curvature tensor W∗ on M has been considered.
M. R. Amruthalakshmi   +4 more
wiley   +1 more source

On canonscal quasi-geodesic mappings of recurrent-parabolic spaces

open access: yesPracì Mìžnarodnogo Geometričnogo Centru, 2018
The article is devoted to the problem of holomorphically projective transformations of locally conformal Kaehler manifolds. it's worth to be noted,  that J. Mikes and Z.
Yevhen Cherevko, Olena Chepurna
doaj   +1 more source

Financialization, common stochastic trends, and commodity prices

open access: yesJournal of Futures Markets, Volume 41, Issue 12, Page 1988-2008, December 2021., 2021
Abstract Commodity financialization has been a subject of discussion since the 2008 financial crisis. It is estimated that between 2003 and 2008, index investorsʼ positions increased from $13 billion to $317 billion. Surprisingly, most studies, predominantly based on Granger‐causality testing, find no relationship between financialization and commodity
Moses M. Kupabado, Juergen Kaehler
wiley   +1 more source

Geometric Mechanics on Warped Product Semi-Slant Submanifold of Generalized Complex Space Forms

open access: yesAdvances in Mathematical Physics, 2021
In this study, we develop a general inequality for warped product semi-slant submanifolds of type Mn=NTn1×fNϑn2 in a nearly Kaehler manifold and generalized complex space forms using the Gauss equation instead of the Codazzi equation.
Yanlin Li, Ali H. Alkhaldi, Akram Ali
doaj   +1 more source

Geometry of CR-Slant Warped Products in Nearly Kaehler Manifolds

open access: yesMathematics, 2023
Recently, we studied CR-slant warped products B1×fM⊥, where B1=MT×Mθ is the Riemannian product of holomorphic and proper slant submanifolds and M⊥ is a totally real submanifold in a nearly Kaehler manifold. In the continuation, in this paper, we study B2×
Siraj Uddin, Bang-Yen Chen, Rawan Bossly
doaj   +1 more source

E-RECURRENT KAEHLER MANIFOLDS

open access: yesDemonstratio Mathematica, 1985
The authors consider Kaehlerian manifolds whose Einstein tensor is recurrent. Some properties of such manifolds in relation to Ricci- recurrent, Bochner-recurrent, H-projective recurrent and H-concircular recurrent manifolds are studied.
Singh, S. S.   +2 more
openaire   +2 more sources

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