Billy James Pettis (1913 – 14 April 1979), was an American mathematician, known for his contributions to functional analysis.
See also 
- Graves, William H.; Davis, Robert L.; Wright, Fred B., Introduction. In: Proceedings of the Conference on Integration, Topology, and Geometry in Linear Spaces (Univ. North Carolina, Chapel Hill, N.C., 1979), pp. vii—ix, Contemporary Mathematics 2, Amer. Math. Soc., Providence, R.I., 1980. MR621848 (This is an introduction to the collection of papers dedicated to the memory of B. J. Pettis.)
External links