Results 271 to 280 of about 17,306,746 (301)

Invariant Approach to a Space-Time Symmetry

Journal of Mathematical Physics, 1971
A study is made of Killing vector fields in vacuum Einstein spaces with a restriction primarily to those fields whose associated bivector is nonnull. However, a well-known theorem of Robinson is modified slightly to show that if such a space admits a null bivector associated with a Killing vector, the space must be algebraically special.
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Embedded Space-Time and Particle Symmetries

Reviews of Modern Physics, 1965
The bootstrap yields the strong-interactions symmetry provided the hadron currents participating in nonstrong interactions are first fed into it; the alternative course, in which the bootstrap is required to generate the entire symmetry uniquely, with no a priori information from the nonstrong interactions, seems to lie beyond the present techniques ...
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Symmetries of Space-Time

2019
Abstract This chapter discusses preliminary concepts needed for the book: relativity and relativistic kinematics, natural units, elements of group theory, discrete symmetries of space ...
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Internal-Symmetry Groups and Curved Space-Time

Physical Review, 1965
Some theorems are proved which exhibit the impossibility of constructing nontrivial products of the 3+2 de Sitter group with internal-symmetry groups (under physically reasonable assumptions). It is shown that either mass degeneracy, $[{E}_{\ensuremath{\alpha}},{P}_{\ensuremath{\mu}}]=0$, or simultaneous measurement of internal quantum numbers and ...
Acharya, R., Narayanaswamy, P.
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Macroscopic symmetry in space-time

Reports on Progress in Physics, 1963
Magnetic and non-magnetic crystallographic point groups may be distinguished by the different relations in which they stand to the time-inversion or anti-identity operator R. The 32 point groups of classical crystallography G may be used to generate both magnetic and non-magnetic groups.
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Coupling of Space-Time and Internal Symmetry

Fortschritte der Physik, 1968
Hegerfeldt, G. C., Hennig, J.
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Symmetries of κ-Minkowski space-time: a possibility of exotic momentum space geometry?

Journal of High Energy Physics, 2023
P Nandi, Frederik Scholtz, Sayan Kr Pal   +2 more
exaly  

Space-Dependent Symmetries and Fractons

Frontiers in Physics, 2022
Francisco Pena-Benitez, Piotr Surówka, Carlos Hoyos   +2 more
exaly  

Symmetries of self-dual Yang-Mills equations dimensionally reduced from (2, 2) space-time

Journal of High Energy Physics, 2011
Paul Mansfield
exaly  

Space-time Symmetries

2019
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