“…Su and Zhang [10] discussed the existence of unbounded solutions and used the Schauder's fixed point theorem to prove the existence of solutions for the following BVP D α 0 + u(t) + f (t, u(t), D α−1 0 + u(t)) = 0, t ∈ (0, +∞), u(0) = 0, u (0) = 0, D α−1 0 + u(∞) = u ∞ , u ∞ ∈ R, where 1 < α 2. Yu, Wang, and Guo [13] considered the solvability for the following integral boundary value problem of fractional differential equation:…”