Three periodic solutions for a class of higher-dimensional functional differential equations with impulses
Yongkun Li, Changzhao Li, Juan Zhang (2010)
Annales Polonici Mathematici
Similarity:
By using the well-known Leggett–Williams multiple fixed point theorem for cones, some new criteria are established for the existence of three positive periodic solutions for a class of n-dimensional functional differential equations with impulses of the form ⎧y’(t) = A(t)y(t) + g(t,yt), , j ∈ ℤ, ⎨ ⎩, where is a nonsingular matrix with continuous real-valued entries.