Timeline for Unitary groups over number fields
Current License: CC BY-SA 3.0
2 events
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| Jun 26, 2016 at 22:23 | comment | added | paul garrett | As in this answer, the restriction is mainly assure that the archimedean behavior is as expected, namely, classical (archimedean) unitary groups. Since (as it seems to turn out) the archimedean components of automorphic repns play a disproportionately large role, this is a reasonable distinction for automorphic purposes. For example, by the Hasse principle for hermitian forms, in more than 2 dimensions, compactness of arithmetic quotients of such groups depends most directly on the behavior at archimedean places. For more-purely algebraic-group purposes, it might be somewhat less significant. | |
| May 1, 2011 at 21:40 | history | answered | Emerton | CC BY-SA 3.0 |