منابع مشابه
Loss compensation in metal-dielectric layered metamaterials
Roman S. Savelev,1 Ilya V. Shadrivov,2 Pavel A. Belov,1 Nikolay N. Rosanov,1,3 Sergey V. Fedorov,1,3 Andrey A. Sukhorukov,2 and Yuri S. Kivshar1,2 1National Research University of Information Technologies, Mechanics and Optics (ITMO), St. Petersburg 197101, Russia 2Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200, Australia ...
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Classical philology is duly considered to be, probably, the most conservative discipline of the humanities. Russian classical philology, historically heavily dependent on German Altertumswissenschaft, must be the most radical specimen of this conservatism. Its fate in the time of economical and political changes, when humanities presumably should be not even in the second, or third, but on the ...
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We present a general result of transverse nonlinear instability of 1-d solitary waves for Hamiltonian PDE’s for both periodic or localized transverse perturbations. Our main structural assumption is that the linear part of the 1d model and the transverse perturbation “have the same sign”. Our result applies to the generalized KP-I equation, the Nonlinear Schrödinger equation, the generalized Bo...
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We discuss a conjecture which says that the automorphism group of the Weyl algebra in characteristic zero is canonically isomorphic to the automorphism group of the corresponding Poisson algebra of classical polynomial symbols. Several arguments in favor of this conjecture are presented, all based on the consideration of the reduction of the Weyl algebra to positive characteristic.
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A
سال: 1982
ISSN: 0567-7394
DOI: 10.1107/s056773948200120x