John R. Stallings
Scientist
John Robert Stallings Jr. (July 22, 1935 – November 24, 2008) was a mathematician known for his seminal contributions to geometric group theory and 3-manifold topology. Stallings was a Professor Emeritus in the Department of Mathematics at the University of California at Berkeley where he had been a faculty member since 1967. He published over 50 papers, predominantly in the areas of geometric group theory and the topology of 3-manifolds. Stallings' most important contributions include a proof, in a 1960 paper, of the Poincaré Conjecture in dimensions greater than six and a proof, in a 1971 paper, of the Stallings theorem about ends of groups.
Personal facts
| Birth date | July 22, 1935 |
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| Birth place | Morrilton Arkansas , United States |
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| Date of death | November 24, 2008 |
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| Place of death | Berkeley California , United States |
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| Known for | Stallings theorem about ends of groups Generalized Poincaré conjecture |
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