“…Lidstone boundary value problems for ordinary differential equations have attracted considerable attention lately. Moreover, the Lidstone boundary value problems and several of its particular cases have been investigated in many papers, see [1,2,4,7,10,13,16,17]. For example the case q = 4, σ 1 = 0 and σ 2 = 2 has been studied in [4], the authors proved the existence of at least three symmetric positive solutions by using Leggett and Williams fixed point theorem, to the fourth order Lidstone boundary value problem y (4) …”