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Symmetries of fâassociated standard static spacetimes and applications

Journal of the Egyptian Mathematical Society, 2017
The purpose of this note is to study and explore some collineation vector fields on standard static spacetimes Ifâ¯Ãâ¯M(also called fâ associated SSST). Conformal vector fields, Ricci and matter collineations are studied.
H.K. El-Sayied, Sameh Shenawy, Noha Syied +2 more
doaj

Distributed three-dimensional affine formation maneuver control for multiple autonomous underwater vehicles

Zhongguo Jianchuan Yanjiu
ObjectivesTo improve the ability of autonomous underwater vehicle (AUV) formations to perform tasks in complex obstacle scenarios, a distributed three-dimensional affine formation shape maneuver control method is proposed for multi-AUV formations ...
Mingqi YAO, Lin YU, Kai GUO, Yu LU, Lei QIAO +4 more
doaj +1 more source

Finite Collineation Groups: With an Introduction to the Theory of Groups of Operators and Substitution Groups

, 2007
The theory of finite groups of linear substitutions may be said to have been originated by Klein in 1876 :in connection with a problem :in the theory of invariants ; subsequently he extended Galois's theory of algebraic equations by the introduction of ...
H. F. Blichfeldt
semanticscholar +1 more source

Notes on Cooperstein Ovoids in Finite Geometries of Type 𝖤_6,1

Mathematics
A Cooperstein ovoid is a set of q8+q4+1 pairwise non-collinear points in the Lie incidence geometry E6,1(q). They were introduced by Cooperstein twenty-six years ago, motivated by the fact that possible non-existence of them would imply non-existence of ...
Hendrik Van Maldeghem
doaj +1 more source

Genome-Wide Analysis of bHLH Family Genes and Identification of Members Associated with Cold/Drought-Induced Photoinhibition in Kandelia obovata. [PDF]