“…In [7][8][9][10][11][12][13][14][15], the authors studied the existence of periodic solutions, subharmonic solutions and homoclinic orbits for the p(t)-Laplacian systems ⎧ ⎨ ⎩ d dt (|u(t)| p(t)-2u (t)) + ∇V (t, u(t)) = 0, a.e. t ∈ [0, T] u(0)u(T) =u(0) -u(T) = 0, (1.2) where p(t) ∈ C([0, T], R + ), the operator d dt (|u(t)| p(t)-2u (t)) is said to be p(t)-Laplacian.…”