Saharon Shelah is receiving the 2013 AMS Leroy P. Steele Prize for Seminal Contribution to Research

Providence, RI—Saharon Shelah is receiving the 2013 AMS Leroy P.
Steele Prize for Seminal Contribution to Research. Shelah is
Distinguished Visiting Professor of Mathematics at Rutgers University
and Professor of Mathematics at the Hebrew University of Jerusalem.
Presented annually by the American Mathematical Society, the Steele
Prize is one of the highest distinctions in mathematics. The prize
will be awarded on Thursday, January 10, 2013, at the Joint
Mathematics Meetings in San Diego.

Shelah is honored for his book Classification Theory and the Number of
Non-Isomorphic Models (Studies in Logic and the Foundations of
Mathematics, 92, North-Holland Publishing Co., 1978; 2nd edition,
1990).

“Before Shelah’s work, the great theorem of pure model theory was
Morley’s theorem on categoricity,” the prize citation says. “It
concerned a class of theories whose uncountable models are completely
determined by their cardinality. Shelah visualized a vast extension of
the problem to a classification of arbitrary first-order theories,
based on the number of models they may have of a given uncountable
size. Solving this problem required some twenty years that made model
theory into a mature field, completely transforming its aims, methods,
and ability to connect to algebra and geometry.” Shelah’s book had a
profound impact on this development.

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