نتایج جستجو برای: degenerate

تعداد نتایج: 21178  

Journal: :International Astronomical Union Colloquium 1989

2012
Anton I. Ignatov Alexander M. Merzlikin Miguel Levy Alexey P. Vinogradov

In the review, peculiarities of spectra of one-dimensional photonic crystals made of anisotropic and/or magnetooptic materials are considered. The attention is focused on band gaps of a special type-the so called degenerate band gaps which are degenerate with respect to polarization. Mechanisms of formation and properties of these band gaps are analyzed. Peculiarities of spectra of photonic cry...

Journal: :Symmetry 2022

Conformal matter collineations of the energy-momentum tensor for a general spherically symmetric static spacetime are studied. The form these is found when non-degenerate, and maximum number independent conformal \emph{fifteen}. In degenerate case it that have infinite degrees freedom. some subcases energy-momentum, Ricci is, there exist non-degenerate inheritance collineations.

Journal: :Journal of Algebra 1974

Journal: :Journal of Differential Equations 1982

Journal: :Discrete Mathematics 1997

Journal: :Canadian Journal of Mathematics 2014

Journal: :Letters in Mathematical Physics 2014

Journal: :Physics Letters A 1996

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