Results 1 to 10 of about 5,091 (242)
Collineation group as a subgroup of the symmetric group [PDF]
Open Mathematics, 2013 Let ψ be the projectivization (i.e., the set of one-dimensional vector subspaces) of a vector space of dimension ≥ 3 over a field. Let H be a closed (in the pointwise convergence topology) subgroup of the permutation group $\mathfrak{S}_\psi $ of the set
Bogomolov Fedor, Rovinsky Marat
doaj +4 more sources
Genome-wide identification and characterization of the bHLH gene family and analysis of their potential relevance to chlorophyll metabolism in Raphanus sativus L [PDF]
BMC Genomics, 2022 Background Green-fleshed radish (Raphanus sativus L.) is an economically important root vegetable of the Brassicaceae family, and chlorophyll accumulates in its root tissues.
Ruihua Wang +4 more
doaj +2 more sources
Collineation groups of translation planes of small dimension [PDF]
International Journal of Mathematics and Mathematical Sciences, 1981 A subgroup of the linear translation complement of a translation plane is geometrically irreducible if it has no invariant lines or subplanes. A similar definition can be given for geometrically primitive.
T. G. Ostrom
doaj +2 more sources
ON THE DEFINITION OF MATTER COLLINEATIONS [PDF]
Modern Physics Letters A, 2009 It is shown that when the stress–energy tensor of a spacetime is diagonal and is written in the mixed form, its collineations admit infinite dimensional Lie algebras except possibly in the case when the tensor depends on all the spacetime coordinates. The result can be extended for more general second rank tensors.
Qadir, Asghar, Saifullah, K.
openaire +4 more sources
Finding the Collineation between Two Projective Reconstructions
Computer Vision and Image Understanding, 1999 G. Csurka, David Demirdjian, Radu Horaud
openalex +3 more sources
Proof of the prime power conjecture for projective planes of order 𝑛 with abelian collineation groups of order 𝑛² [PDF]
, 2001 Aart Blokhuis +2 more
openalex +2 more sources
Geometrization of a general collineation
Journal of Mathematical Physics, 1992 Geometrization of a general collineation means to express the collineation as necessary and sufficient conditions on the kinematic quantities (shear, vorticity, expansion) of the congruence of the vector field generating the collineation. It is shown that the generic form of a collineation is Lξgab = 2ψgab + Hab where Hab is a traceless symmetric ...
M. Tsamparlis
openaire +3 more sources
WEYL COLLINEATIONS THAT ARE NOT CURVATURE COLLINEATIONS [PDF]
International Journal of Modern Physics D, 2005 Though the Weyl tensor is a linear combination of the curvature tensor, Ricci tensor and Ricci scalar, it does not have all and only the Lie symmetries of these tensors since it is possible, in principle, that "asymmetries cancel." Here we investigate if, when and how the symmetries can be different.
Hussain, Ibrar +2 more
openaire +3 more sources
Finite collineation groups and birational rigidity [PDF]
Selecta Mathematica, 2017 We classify finite groups G in PGL4(C)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt ...
I. Cheltsov, C. Shramov
semanticscholar +1 more source
Frontiers of Architectural Research, 2022 The Imperial Citadel of Thang Long is a crucial case in ancient Vietnam's planning and design history. Although historical materials indicate that the orientation of the Imperial Citadel of Thang Long has a dialectical unity relationship with the ...
Theanh Dinh, Xiaogeng Ren
doaj +1 more source