Upper and lower solutions for periodic problems

  • Authors:
  • Xiaojing Yang

  • Affiliations:
  • Department of Mathematics, Tsinghua University, Beijing 100084, People's Republic of China

  • Venue:
  • Applied Mathematics and Computation
  • Year:
  • 2003

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Abstract

Upper and lower solutions method, topological degree and Miranda fixed point theorem are applied to obtain the existence of at least one periodic solution for second order and first order nonlinear differential systems.