Continuous characters of real tori
نویسنده
چکیده
In this essay I hope to explain the classification of characters of algebraic tori defined over R, particularly Langlands’ parametrization in terms of homomorphisms from the Weil group into the associated L-group. I’ll follow more or less the treatment in §§2 and 3 of [Langlands:1974/1989], avoiding most subsequent ‘improvements’. The only slightly new thing is how I relate Langlands’ formula for characters more directly to the structure of a real torus.
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