David_W._Lewis_(mathematician)
David W. Lewis (21 February 1944 in Douglas, Isle of Man—20 August 2021 in Dublin)[1] was a Manx mathematician known for his contributions to quadratic forms theory. He spent his entire career at University College Dublin (UCD), where he was head of the Department of Mathematics (now the School of Mathematics and Statistics) from 1999 until 2002. After his retirement in 2009 he remained research active for many years.[2][3]