“…First, based on the definitions of fractional calculus, inequality (1.2) has been extended to various forms with different fractional derivatives, such as Caputo [7,8], Hadamard [9,10], Katugampola [11], Hilfer [12,13], Caputo-Fabrizio [14], Hilfer-Katugampola [15,16], and so on. Second, under different boundary conditions, scholars studied fractional Lyapunov-type inequalities for nonlocal BVPs (multi-point BVPs [17,18] and integral BVPs [19,20]). To the best of the authors' knowledge, there are only few papers on Lyapunov-type inequalities for fractional differential equations with m-point boundary value problems in the literature; see [12,15,18].…”