“…which envelope kinds of subclasses as special cases (see, e.g. [5,6,8,9,21,22,24,25,27]). If f i = z + ∞ n=2 a n,i z n ∈ A (i = 1, 2), then the Hadamard product (or convolution) of f 1 and f 2 is defined by ( f 1 * f 2 )(z) = z + ∞ n=2 a n,1 a n,2 z n , z ∈ U. where q s + 1, q, s ∈ {0, 1, 2, ...}, z ∈ U (see, e.g.…”