Results 81 to 90 of about 1,685,988 (224)

Lie symmetries for equations in conformal geometries [PDF]

open access: yesJournal of Physics A: Mathematical and General, 2005
19 pages, To appear in J.
Keshlan S. Govinder   +3 more
openaire   +4 more sources

Symmetry of Square Contingency Tables Using Simplicial Geometry

open access: yesAustrian Journal of Statistics
Two-way contingency tables illustrate the relationship between two discrete variables. Their corresponding probability tables can be regarded as an element in a simplex.
Keita Nakamura   +2 more
doaj   +1 more source

Quantum gauge symmetries in noncommutative geometry

open access: yesJournal of Noncommutative Geometry, 2014
We discuss generalizations of the notion of i) the group of unitary elements of a (real or complex) finite-dimensional C*-algebra, ii) gauge transformations and iii) (real) automorphisms in the framework of compact quantum group theory and spectral triples.
Bhowmick, J.   +3 more
openaire   +6 more sources

F-theory on quotients of elliptic Calabi-Yau threefolds

open access: yesJournal of High Energy Physics, 2019
In this work we consider quotients of elliptically fibered Calabi-Yau threefolds by freely acting discrete groups and the associated physics of F-theory compactifications on such backgrounds.
Lara B. Anderson   +2 more
doaj   +1 more source

Mirror symmetry and tropical geometry [PDF]

open access: yesarXiv: Algebraic Geometry, 2007
Using tropical geometry we propose a mirror construction for monomial degenerations of Calabi-Yau varieties in toric Fano varieties. The construction reproduces the mirror constructions by Batyrev for Calabi-Yau hypersurfaces and by Batyrev and Borisov for Calabi-Yau complete intersections. We apply the construction to Pfaffian examples and recover the
openaire   +1 more source

Symmetry in toric geometry

open access: yes, 2020
Families of algebraic varieties that are parametrized by monomials appear in various areas of mathematics, such as statistics, commutative algebra and combinatorics. Such varieties are referred to as toric varieties and they are the structural objects of toric geometry. The ideals defining toric varieties are prime binomial ideals.
openaire   +3 more sources

trans-Dibromidotetrakis(pyridine-κN)ruthenium(II)

open access: yesActa Crystallographica Section E, 2013
The title complex, [RuBr2(C5H5N)4], contains two independent complex molecules in each of which the RuII atom is located on a site of 222 symmetry and has a distorted octahedral coordination geometry with four pyridine N atoms and two Br atoms.
Xiu-Li Wu   +4 more
doaj   +1 more source

Multi-invariants and bulk replica symmetry

open access: yesJournal of High Energy Physics
In this paper, we analyze the question of replica symmetry in the bulk for multi-partite entanglement measures in the vacuum state of two dimensional holographic CFTs.
Abhijit Gadde   +2 more
doaj   +1 more source

Di-μ-sulfato-bis{[bis(3,5-dimethylpyrazol-1-yl)methane]copper(II)}

open access: yesActa Crystallographica Section E, 2008
The molecule of the title compound, [Cu2(SO4)2(C11H16N4)2], sits on a center of symmetry. The CuII atom has a distorted trigonal–bipyramidal coordination geometry comprising three O atoms of the two symmetry-related SO42− anions and two N ...
XiuLi You, XingCong Wang, YanLi Wu
doaj   +1 more source

Tetrakis(1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidin-9-ido-κ2N1,N9)niobium(V) hexafluoridophosphate

open access: yesActa Crystallographica Section E, 2008
The title complex, [Nb(C7H12N3)4]PF6, features chelating hpp anions (hpp is 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine) that define a distorted dodecahedral coordination geometry based on an N8 donor set.
Edward R. T. Tiekink   +4 more
doaj   +1 more source

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