Results 41 to 50 of about 93,031 (274)

Killing Vector Fields in Generalized Conformal β-Change of Finsler Spaces

open access: yesJournal of Mathematics, 2015
We consider a Finsler space equipped with a Generalized Conformal β-change of metric and study the Killing vector fields that correspond between the original Finsler space and the Finsler space equipped with Generalized Conformal β-change of metric.
Mallikarjun Yallappa Kumbar   +3 more
doaj   +1 more source

Vector Galileon and inflationary magnetogenesis

open access: yes, 2018
Cosmological inflation provides the initial conditions for the structure formation. However, the origin of large-scale magnetic fields cannot be addressed in this framework.
Nandi, Debottam, Shankaranarayanan, S.
core   +2 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

open access: yesFEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa   +5 more
wiley   +1 more source

Conformal Ricci collineations of static spherically symmetric spacetimes

open access: yes, 2010
Conformal Ricci collineations of static spherically symmetric spacetimes are studied. The general form of the vector fields generating conformal Ricci collineations is found when the Ricci tensor is non-degenerate, in which case the number of independent
Asghar Qadir   +10 more
core   +1 more source

Conformal superalgebras via tractor calculus [PDF]

open access: yes, 2014
We use the manifestly conformally invariant description of a Lorentzian conformal structure in terms of a parabolic Cartan geometry in order to introduce a superalgebra structure on the space of twistor spinors and normal conformal vector fields ...
Lischewski, Andree
core   +1 more source

Conformal vector fields and Yamabe solitons [PDF]

open access: yesInternational Journal of Geometric Methods in Modern Physics, 2019
In this paper, we use less topological restrictions and more geometric and analytic conditions to obtain some sufficient conditions on Yamabe solitons such that their metrics are Yamabe metrics, that is, metrics of constant scalar curvature. More precisely, we use properties of conformal vector fields to find several sufficient conditions on the ...
Nasser Bin Turki   +2 more
openaire   +3 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

open access: yesFEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel   +13 more
wiley   +1 more source

From spinning conformal blocks to matrix Calogero-Sutherland models

open access: yesJournal of High Energy Physics, 2018
In this paper we develop further the relation between conformal four-point blocks involving external spinning fields and Calogero-Sutherland quantum mechanics with matrix-valued potentials.
Volker Schomerus, Evgeny Sobko
doaj   +1 more source

Pole-skipping of scalar and vector fields in hyperbolic space: conformal blocks and holography

open access: yesJournal of High Energy Physics, 2020
Motivated by the recent connection between pole-skipping phenomena of two point functions and four point out-of-time-order correlators (OTOCs), we study the pole structure of thermal two-point functions in d-dimensional conformal field theories (CFTs) in
Yongjun Ahn   +5 more
doaj   +1 more source

The biharmonic homotopy problem for unit vector fields on 2-tori

open access: yes, 2018
The bienergy of smooth maps between Riemannian manifolds, when restricted to unit vector fields, yields two different variational problems depending on whether one takes the full functional or just the vertical contribution. Their critical points, called
Loubeau, E., Markellos, M.
core   +2 more sources

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