Billy James Pettis (1913 – 14 April 1979), was an American mathematician, known for his contributions to functional analysis.

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (September 2016)

• Dunford–Pettis property
• Dunford–Pettis theorem
• Milman–Pettis theorem
• Orlicz–Pettis theorem
• Pettis integral
• Pettis theorem

• 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.)

• Billy James Pettis at the Mathematics Genealogy Project
• A Guide to the B. J. Pettis Papers, 1938-1980

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