Results 71 to 80 of about 4,560,118 (257)

Real Hypersurfaces of Type A in Complex Two-Plane Grassmannians Related to The Reeb Vector Field

open access: yes, 2015
Y. J. Suh and H. Lee (Bull. Korean. Math. Soc. 47, 551-561 (2010)) characterized real hypersurfaces $M$ of type $B$ by the invariance of vector bundle $JTM^\perp$ under the shape operator and the orthogonality of $JTM^\perp$ and $\mathcal {J}TM^\perp ...
Lee, Ruenn-Huah, Loo, Tee-How
core   +1 more source

Hilbert–Kunz multiplicity of powers of ideals in dimension two

open access: yesBulletin of the London Mathematical Society, EarlyView.
Abstract We study the behavior of the Hilbert–Kunz multiplicity of powers of an ideal in a local ring. In dimension 2, we provide answers to some problems raised by Smirnov, and give a criterion to answer one of his questions in terms of a “Ratliff–Rush version” of the Hilbert–Kunz multiplicity.
Alessandro De Stefani   +3 more
wiley   +1 more source

Thurston obstructions and tropical geometry

open access: yesBulletin of the London Mathematical Society, EarlyView.
Abstract We describe an application of tropical moduli spaces to complex dynamics. A post‐critically finite branched covering φ$\varphi$ of S2$S^2$ induces a pullback map on the Teichmüller space of complex structures of S2$S^2$; this descends to an algebraic correspondence on the moduli space of point‐configurations of P1$\mathbb {P}^1$.
Rohini Ramadas
wiley   +1 more source

Contact real hypersurfaces in the complex hyperbolic quadric [PDF]

open access: yesAnnali di Matematica Pura ed Applicata, 2017
We discuss the geometry of contact real hypersurfaces with constant mean curvature in the complex hyperbolic quadric $${Q^m}^* = SO_{m,2}^o/SO_mSO_2$$Qm∗=SOm,2o/SOmSO2, where $$m\ge 3$$m≥3.
S. Klein, Y. Suh
semanticscholar   +1 more source

A Joyful Journey: Tungsten(VI) and Tungsten(V) Fluorides Meet N‐Heterocyclic Carbenes and Cyclic (Alkyl)(Amino)Carbenes

open access: yesAngewandte Chemie International Edition, Volume 64, Issue 25, June 17, 2025.
The first tungsten(VI) fluoride complexes coordinated with N‐heterocyclic carbenes and cyclic (alkyl)(amino) carbenes were synthesized and characterized. Reduction of these seven‐coordinated complexes afforded rare octahedral tungsten(V) fluoride complexes, a dinuclear fluoride‐bridged complex (cAACMe), or a seven‐coordinated (cAACMe) bis‐carbene ...
Melanie Riethmann   +7 more
wiley   +1 more source

On a New type of Tensor on Real Hypersurfaces in Non-Flat Complex Space Forms

open access: yesSymmetry, 2019
In this paper the notion of ∗ -Weyl curvature tensor on real hypersurfaces in non-flat complex space forms is introduced. It is related to the ∗ -Ricci tensor of a real hypersurface. The aim of this paper is to provide
G. Kaimakamis, K. Panagiotidou
semanticscholar   +1 more source

Time‐Resolved Dynamics of Laser Ablation in Liquid with Gas‐Evolving Additives: Toward Molding the Atomic Structure of Nonequilibrium Nanoalloys

open access: yesAdvanced Science, Volume 12, Issue 21, June 5, 2025.
Laser ablation in liquid still holds great potential for the synthesis of multicomponent non‐equilibrium nanomaterials. Here, time‐resolved experiments reveal that gas‐evolving additives both have chemical effects and reduce shockwave pressure. This approach offers a strategy to control the atomic structure of the nanoalloys, easily switching from ...
Vito Coviello   +8 more
wiley   +1 more source

ALMOST HOLOMORPHIC CURVES IN REAL ANALYTIC HYPERSURFACES

open access: yes, 2023
Using the theory of exterior differential systems, we study the existence of germ of pseudo-holomorphic disk in a real analytic hypersurface locally defined in a complex manifold equipped with J a real analytic almost complex structure. The integrable case in C n with J the multiplication by i has been intensively studied by several authors [DF], [DA1]
Bonneau, Pierre, Mazzilli, Emmanuel
openaire   +3 more sources

Reconfigurable Intelligent Surfaces (RIS) and Their Role in Next‐Generation Wireless Networks: An Overview

open access: yesTransactions on Emerging Telecommunications Technologies, Volume 36, Issue 6, June 2025.
This paper explicitly reviews the state‐of‐the‐art RIS‐assisted wireless networks, especially open challenges relating to the B5G and 6G networks. This work presents an intensive study of recent research on RIS to provide an in‐depth understanding of the underlying principles surrounding RIS operations, composition, and effect on EM waves.
Chukwuemeka Nwufo   +2 more
wiley   +1 more source

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