NEW YORK, 29 September 2016 – Sotheby’s fall season of Contemporary Art auctions in New York commenced today with Contemporary Curated, achieving $15.2 million. Led by Robert Mangold’s Three Squares Within a Triangle and Damien Hirst’s Beautiful Polarisation Of A Polar Bear's Dream In The Polar Ice Painting (With A Centre Like A Polar Bear's Eye (Or A Polar Bear's Ass)),…