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with the increasing oscillation amplitude. Obtained results indicate the presence of a wide variety of nonlinear

, large-amplitude vibrational modes in nonlinear lattices. Rod-like discrete breathers (DBs) have been

. The two-dimensional DBs exhibit hard-type nonlinearity, characterized by an increase in oscillation

.5-1.0 eV per oscillating atom. The two-dimensional DBs have a hard-type of nonlinearity and a lifetime

modes in a defect free nonlinear crystal lattice, i.e., discrete breathers (DBs). For that, dynamics

triangular lattice due to the modulation instability of delocalized nonlinear vibrational modes (DNVMs

) lattice is analyzed. These solutions take the form of delocalized nonlinear vibrational modes (DNVMs

МАЛАЯ НУТАЦИЯ СИММЕТРИЧНОГО ГИРОСКОПА: ДВЕ ТОЧКИ ЗРЕНИЯ is obtained. In this case, the frequencies of third order Raman oscillations are both the tripled frequency

It is well known that a modulationally unstable short-wavelength delocalized nonlinear vibrational

НОВЫЕ ТИПЫ ОДНОМЕРНЫХ ДИСКРЕТНЫХ БРИЗЕРОВ В ДВУМЕРНОЙ РЕШЕТКЕNONLINEAR LATTICE DYNAMICS

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