Donal O'Shea (IMAGE) American Mathematical Society Caption Donal O'Shea, one of the winners of the 2016 AMS Steele Prize for Exposition Credit Kim Butler Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.