  The article is dedicated towards the study of fractional order non-linear
differential systems with non-instantaneous impulses involving
Riemann-Liouville derivatives with fixed lower limit and appropriate integral
type initial conditions in Banach spaces. First, mild solution of the system is
constructed and subsequently its existence is proven using Banach's fixed point
theorem. Then, results of approximate controllability are established using
concept of fractional semigroup and an iterative technique. Suitable examples
are given in the end supporting the methodology along with pointing out
correction in examples presented in previous articles.
