Existence of periodic solutions of higher-order differential equations

Existence of positive solutions for various boundary value problems

“…In fact, particular cases of the boundary value problems (BVP j ) occur in various physical phenomena [4,[6][7][8][9][10][11], specially such as gas diffusion through porous media, thermal self-ignition of a chemically active mixture of gases in a vessel [9], catalysis theory [10], chemically reacting systems, as well as adiabatic tubular reactor processes. For the other related works, we refer to recent contributions of Agarwal and Wong [1][2][3], Anuradaha, Hai and Shivaji [6], Bailey, Shampine and Waltman [7], Erbe and Wang [4], Lee and O'Regan [12], Henderson [13], Kelevedjiev [14,15] and Wong, Lian, Lin and Yu [16] and the references therein.…”