“Robert Ryman: Works on Paper, 1957-1964” until September 25 (closed for August, 99 Wooster Street, between Spring and Prince, 212-343-0441). “Band of Abstraction” until August 14 (819 Washington Street, between Little W. 12th and Gansevoort Streets, 212-243-8572). A painterly equivalent to the truism that the child is father to the man is that an artist’s … Continued