AZIZOLLAH BABAKHANI - Department of Base Science, Babol University of thechnology, Babol, Mazandaran, Iran
VARSHIA DAFTARDAR-GEJJI - Department of Mathematics, University of pune, Pune, India

In this paper we discuss conditions under which the fractional initial value problem: Y(k)(0) = y0(k) k=0, 1,… m-1 has unique solution, where m-1<α≤m, mЄ N,Dα* and D??? Denote Caputo, riemann-Liouville fractional derivatives respectively.

Capute ans Riemann-Liouville fractional derivatives, Positive solutions, Mittag-Leffler function