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µoªí©ó¡G Aug 31 2006, 12:20 ¡@
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Mumford's early work, for which he received the Fields Medal in 1974, was in algebraic geometry and especially the study of algebraic curves. This is an old and central subject in mathematics with contributions from many of the great names of the past. Despite this, much remained to be done and Mumford's great achievement was to revitalise and push forward the theory of moduli. Algebraic Curves depend on an important integer, the genus g. For g = 0 the curve is rational, for g = 1 it is elliptic and depends on an additional continuous parameter or modulus. For g > 2 there are 3g-3 moduli, forming a (complicated) space whose features give us information about the totality of all curves. Mumford laid the foundations for a systematic and fruitful study of this moduli space. This has been widely influential even, surprisingly, in the physics of string theory.


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