Exhibitions: Carnegie's 43rd

For those who had the time and the air fare to taste and compare, 1964 has already proved a vintage year for big art festivals. By coincidence, three famous periodic exhibitions fell in the same year that London's Tate Gallery put on its bold survey of a decade of invention. That exhibition introduced a host of young Londoners. Venice's 32nd brassy Biennale gave official acclaim to U.S. pop. Germany's didactic Dokumenta III then launched op. The 43rd Pittsburgh International, better known as the Carnegie, fails to find any new avantgarde, but makes...