Results 91 to 100 of about 1,685,988 (224)
Química NovaThe built of qualitative energy-level molecular diagrams for different geometries of simple molecules allow to explain the preferred geometry. The diagrams are built using simple symmetry principles and explain, on basis of the number of nonbonding ...
Sérgio P. Machado, Roberto B. Faria
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Symmetries and geometry in general relativity
Differential Geometry and its Applications, 1991 AbstractThis paper provides a geometrical discussion of affine (including isometric and homothetic), conformal and curvature symmetries in space-time. Emphasis is laid more on a systematic presentation of the material rather than the accumulation of exact solutions of Einstein's equations. A review of recent work is given and some new results presented.
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The General Linear Cartan Khronon
Universe, 2019 A Cartan geometry of the General Linear symmetry is formulated by dividing out the displacements from the group. The resulting action is quadratic in curvature, polynomial in all the (minimal) variables, and describes an observer space that—in the ...
Tomi Koivisto +2 more
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Homogeneous mechanical systems with symmetry, and geometry of the coadjoint action [PDF]
, 1976 Ernesto A. Lacomba
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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
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On the Geometry of Hamiltonian Symmetries [PDF]
Mathematics and Statistics, 2020 Narmanov Abdigappar, Parmonov Hamid
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DISCRETE SYMMETRY, NONCOMMUTATIVE GEOMETRY AND GRAVITY [PDF]
, 1994 N. Mohammedi
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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.
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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
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Acta Crystallographica Section E, 2011 Cerium(III) nitride chloride, Ce2NCl3, contains trans-edge connected [NCe4]9+ tetrahedra (222 symmetry) forming chains parallel to the c axis that are separated by Cl− anions.
Christian M. Schurz, Thomas Schleid
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