Disagree. He was elected president of the major applied math. society in the U.S., and is widely published (e.g. see here). The list of publications alone should make him notable. JJL 20:01, 3 March 2007 (UTC)
Agree. Either merge or write an article on him that establishes notability. Widely publishing papers is normal for mathematicans and does not in itself establish notability. See Wikipedia:Notability_(academics)Billlion 22:05, 4 March 2007 (UTC).
As a representative of SIAM, I have made the following additions to this page: Books, Conferences, SIAM News, Moody's Mega Math (M3) Challenge. I have updated content that was out of date or incorrect and clarified what may have been unclear. Thanks! Stephensonje 18:37, 6 September 2007 (UTC)