Results 151 to 160 of about 967,260 (356)
Acta Crystallographica Section E, 2010 In the title compound, [Zn(SO4)(C12H8N2)2]·C3H8O2, the Zn2+ ion (site symmetry 2) is coordinated by two chelating 1,10-phenanthroline ligands and an O,O′-bidentate sulfate ion (S site symmetry 2), resulting in a distorted cis-ZnO2N4 ...
Jiang-Dong Cui +2 more
doaj +1 more source
The Regge symmetry, confocal conics, and the Schläfli formula [PDF]
arXiv, 2019 The Regge symmetry is a set of remarkable relations between two tetrahedra whose edge lengths are related in a simple fashion. It was first discovered as a consequence of an asymptotic formula in mathematical physics. Here we give a simple geometric proof of Regge symmetries in Euclidean, spherical, and hyperbolic geometry.
arxiv
Advanced Functional Materials, EarlyView.In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund +6 more
wiley +1 more source
Homogeneous mechanical systems with symmetry, and geometry of the coadjoint action [PDF]
, 1976 Ernesto A. Lacomba
openalex +1 more source
Three Dimensional Quantum Geometry and Deformed Poincare Symmetry
, 2008 We study a three dimensional non-commutative space emerging in the context of three dimensional Euclidean quantum gravity. Our starting point is the assumption that the isometry group is deformed to the Drinfeld double D(SU(2)).
Biedenharn L. C. +3 more
core +3 more sources
Symmetries and conservation laws of Hamiltonian systems [PDF]
arXiv, 2017 In this paper we study the infinitesimal symmetries, Newtonoid vector fields, infinitesimal Noether symmetries and conservation laws of Hamiltonian systems. Using the dynamical covariant derivative and Jacobi endomorphism on the cotangent bundle we find the invariant equations of infinitesimal symmetries and Newtonoid vector fields and prove that the ...
arxiv
Geometry and symmetries of null G-structures [PDF]
Classical and Quantum Gravity, 2019 We present a definition of null G-structures on Lorentzian manifolds and investigate their geometric properties. This definition includes the Robinson structure on 4-dimensional black holes as well as the null structures that appear in all supersymmetric solutions of supergravity theories.
openaire +4 more sources
Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.This study reveals that higher shell S coordination can effectively modulate the spin state of FeN4 site via long‐range electronic interactions, giving rise to the oriented generation of singlet oxygen from peroxymonosulfate activation. Abstract Precise manipulation of coordination structure of single‐atom sites and establishment of schematic ...
Liang Zhang +8 more
wiley +1 more source
A Bicontinuous Mesophase Geometry with Hexagonal Symmetry
Langmuir, 2011 We report that a specific realization of Schwarz's triply periodic hexagonal minimal surface is isotropic with respect to the Doi-Ohta interface tensor and simultaneously has minimal packing and stretching frustration similar to those of the commonly found cubic bicontinuous mesophases. This hexagonal surface, of symmetry P6(3)/mmc with a lattice ratio
Walter Mickel +5 more
openaire +4 more sources
Symmetry breaking and the geometry of reduced density matrices
New Journal of Physics, 2016 The concept of symmetry breaking and the emergence of corresponding local order parameters constitute the pillars of modern day many body physics. We demonstrate that the existence of symmetry breaking is a consequence of the geometric structure of the ...
V Zauner +4 more
doaj +1 more source