“…Recently, the existence and uniqueness of pseudo almost automorphic mild solutions to differential equations in Banach spaces has attracted many researchers (see, e.g., [1][2][3][4][5][6][7][8][9]). In particular, in [2] Xiao, Liang and Zhang proved that the space (PAA(X), · ∞ ) is a Banach space and established sufficient conditions for the existence and uniqueness of pseudo almost automorphic mild solutions to semilinear differential equations in Banach spaces, in [3] Xiao, Zhu and Liang introduced a new concept of bi-almost automorphic function and obtained new existence and uniqueness theorems for pseudo almost automorphic mild solutions to several nonautonomous differential equations, thus pushed the door open to study pseudo almost automorphic mild solutions to nonautonomous evolution equations.…”