Results 11 to 20 of about 90 (87)

Conformal Isometries and Curvature Collineations of an Impulsive Plane Wave: a distributional approach

open access: yes, 2021
By extending the notion of Lie derivative to distribution-valued tensor fields of order $m$, Lie derivatives with respect to $C^k$ vector fields, $k\geqslant m+1$, can be shown to be well defined. Geometric symmetries, definable in terms of these Lie derivatives, can then be considered.
Calles, Juan, Pantoja, Nelson
openaire   +2 more sources

Projective Motion, Projective Curvature Collineation and Infinitesimal Projective Transformation in a Finsler Space Equipped with Semi-Symmetric Connection

open access: yesInternational Journal of Scientific Research in Science and Technology, 2020
The present communication has been devoted to the study of projective motion, projective curvature collineation and infinitesimal projective transformation in a Finsler space equipped with semi-symmetric connection. In this communication we have derived results in the form of theorems which hold when the Finsler space under consideration admits both ...
S. K. Tiwari, Ved Mani
openaire   +1 more source

The many facets of shape. [PDF]

open access: yesJ Vis, 2022
Todd JT, Petrov AA.
europepmc   +1 more source

Proper curvature collineations in non-static plane symmetric space-times

open access: yes, 2010
The most general form of non-static plane symmetric space-times is considered to study proper curvature collineations by using the rank of the 6X6 Riemann matrix and direct integration techniques. Studying proper curvature collineations in each non static case of the above space-times it is shown that when the above space-times admit proper curvature ...
Shabbir, Ghulam, Ramzan, M.
openaire   +3 more sources

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