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    • Averaging theory at any order for computing periodic orbits 

      Giné, Jaume; Grau Montaña, Maite; Llibre, Jaume (Elsevier, 2013-05)
      We provide a recurrence formula for the coefficients of the powers of ε in the series expansion of the solutions around ε=0 of the perturbed first-order differential equations. Using it, we give an averaging theory at any ...