Jim Humphreys

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Name Jim Humphreys
Member for 3 years
Seen 2 days ago
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Location U. Massachusetts, Amherst
Age 73
More-or-less retired professor at UMass Amherst. Basically an algebraist with interests in Lie theory, specifically representation theory and related algebraic geometry.
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What are “classical groups”?

dec 8 11 at 13:52 Alain Valette 6,429●14●26

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Is there a reasonable way to refer to a 23 page article with 28 authors?

oct 15 10 at 13:09 Wadim Zudilin 8,674●1●24●59

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Answers
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Motivating the Casimir element
25
Fields of mathematics that were dormant for a long time until someone revitalized them
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Rep Theory Consequences of Bott--Weil--Borel
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Books you would like to read (if somebody would just write them…)
21
Facts from algebraic geometry that are useful to non-algebraic geometers (2)
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Pseudonyms of famous mathematicians
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How might M.C. Escher have designed his patterns?
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What is significant about the half-sum of positive roots?
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Is there a Morse theory proof of the Bruhat decomposition?
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Never appeared forthcoming papers
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Why aren’t representations of monoids studied so much?
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Fraktur symbols for Lie algebras: $\mathfrak{g}$, etc.
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Isomorphic general linear groups implies isomorphic fields?
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Reference for representation theory of SL_2(Z/n)
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About unpublished lecture notes of Philip Hall
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Lie algebras of algebraic groups
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Abstract Jordan Decomposition different from usual Jordan Decomposition
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how to find the varieties whose cohomology realizes certain representations?
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When and why did the postdoctoral position originate?
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Cohomology of Flag Varieties
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Small index subgroups of SL(3,Z)
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Borel’s Paris Lectures
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Why are affine Lie algebras called affine?
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Why are $S$-arithmetic groups interesting?
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Should I become a Mathscinet reviewer?
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Do semisimple algebraic groups always have faithful irreducible representations?
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On the full reducibility of representations of reductive Lie algebras
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Polynomial invariants of the exceptional Weyl groups
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Gap in an argument in Fulton & Harris?
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Connectedness of Centralizers in $GL_n$
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