William Charles Waterhouse (December 31, 1941 – June 26, 2016) was an American mathematician. He was a professor emeritus of Mathematics at Pennsylvania State University. His research interests included abstract algebra, number theory, group schemes, and the history of mathematics. He edited the 1966 English translation of Gauss's Disquisitiones Arithmeticae and was the author of the textbook Introduction to Affine Group Schemes.
In both 1961 and 1962, Waterhouse (at that time an undergraduate at Harvard University) earned a Putnam Fellowship as one of the top five competitors on the William Lowell Putnam Mathematical Competition; with his 1962 performance, he led his school to a third-place team award. He received his Ph.D. in 1968 from Harvard, for work on abelian varieties under the supervision of John Tate, and took a faculty position at Cornell University. In 1975 he moved to Penn State.
Waterhouse has won the Lester R. Ford Award of the Mathematical Association of America twice, in 1984 for his paper "Do Symmetric Problems Have Symmetric Solutions?" and in 1995 for his paper "A Counterexample for Germain".
Waterhouse died on June 26, 2016, in State College, Pennsylvania.
- PSU Mathematics Department - Faculty, retrieved 2010-02-06.
- Reprinted in 1986 by Springer-Verlag, ISBN 978-0-387-96254-2.
- Graduate Texts in Mathematics 66, Springer-Verlag, 1979, ISBN 978-0-387-90421-4.
- The Mathematical Association of America's William Lowell Putnam Competition, retrieved 2010-02-06.
- "Three Math Students Win Third in Contest", The Harvard Crimson, March 16, 1963.
- William Charles Waterhouse at the Mathematics Genealogy Project.
- MAA Writing Awards: Do Symmetric Problems Have Symmetric Solutions?, 1984.
- MAA Writing Awards: A Counterexample for Germain.
- "William C. Waterhouse Obituary", Centre Daily Times, June 29, 2016.