The Anita Shapolsky Gallery currently presents “Abstract Approaches,” a comprehensive collection of many works from the The New York School of the 1950s and 1960s, as well as works as early as 1935 and as recent as 2009. Abstract art means many things. It is not as simple as a room full of gestural paintings, almost indistinguishable from one another. It varies beyond the use of linear shapes and pure geometry. Abstract artists are more complex than one style, or one viable term.