On fractional derivatives with exponential kernel and their discrete   versions
  In this manuscript we define the right fractional derivative and its corresponding right fractional integral with exponential kernel. Then, we provide the integration by parts formula and we use $Q-$operator to confirm our results. The related Euler-Lagrange equations were obtained and one example is analyzed. Moreover, we formulate and discus the discrete counterparts of our results. 
Thabet Abdeljawad, Dumitru Baleanu
math.DS