Billy James Pettis

Billy James Pettis (* 1913, † April 14, 1979 ) was an American mathematician.

Billy James Pettis grew up in Spartanburg, South Carolina, on. In 1932 he received his Master of Arts degree from the University of North Carolina, 1937, he received his doctorate at the University of Virginia with the dissertation integration in Vector Spaces under the guidance of Edward McShane. After living at the University of Virginia (1937-1938), Yale University (1938-1939) and Harvard University (1939-1941), he volunteered for the U.S. Army. Then Pettis turned back to the mathematics, he taught at Yale University (1945-1947), Tulane University (1947-1957) and finally moved to the University of North Carolina, where he remained until his death.

His main area of ​​work was the functional analysis, here the Messbarkeitssatz of Pettis, the set of Orlicz - Pettis, the set of Dunford - Pettis, the Dunford - Pettis property and the Pettis integral are particularly noteworthy. He conducted research on the Principle of closed graph and the set over the open picture in certain topological vector spaces. The set of Milman was proved independently by Pettis, why one often speaks of the set of Milman - Pettis.

The University of North Carolina had the 17th - 19th May 1979 a conference Integration, Topology, and Geometry in Linear Spaces planned, which should coincide with Pettis ' retirement. A few weeks before he died of cancer. The conference proceedings was devoted Billy James Pettis.

Swell

  • Mathematicians ( 20th century)
  • Americans
  • Born in 1913
  • Died in 1979
  • Man
Orlicz–Pettis theorem Dunford–Pettis property Closed graph theorem University of Texas at Austin
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