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Novi Sad J. Math
In the present work, we discuss the differentiability properties of solutions of nabla fractional difference equations of order α (0 < α < 1) with respect to the initial conditions. Further, we develop a nonlinear variation of parameters formula to obtain the solution of a perturbed nonlinear nabla fractional difference equation.fatcat:47qq4offmzfdpiaa3n7on3ygwy