Now showing items 1-2 of 2

    • Ermakov-Lewis invariants and Reid systems 

      Stefan C. Mancas; Rosu Barbus, Haret-Codratian (2014)
      "Reid´s mth-order generalized Ermakov systems of nonlinear coupling constant ? are equivalent to an integrable Emden-Fowler equation. The standard Ermakov-Lewis invariant is discussed from this perspective, and a closed ...
    • Existence of periodic orbits in nonlinear oscillators of Emden-Fowler form 

      Stefan C. Mancas; Rosu Barbus, Haret-Codratian (2016)
      "The nonlinear pseudo-oscillator recently tackled by Gadella and Lara is mapped to an Emden-Fowler (EF) equation that is written as an autonomous two-dimensional ODE system for which we provide the phase-space analysis and ...