“…By constructing lower and upper solutions and with the comparison theorem, Z.L. Now, in this paper, we shall give some necessary and sufficient conditions for the existence of S n−2 p positive solutions as well as S n−1 p positive solutions of the singular super-linear boundary value problems (1.1) by using the fixed point theorems on cones, which are different from that of [5][6][7][8][9][10][11][12]. Now, in this paper, we shall give some necessary and sufficient conditions for the existence of S n−2 p positive solutions as well as S n−1 p positive solutions of the singular super-linear boundary value problems (1.1) by using the fixed point theorems on cones, which are different from that of [5][6][7][8][9][10][11][12].…”