Timeline for Most harmful heuristic?
Current License: CC BY-SA 2.5
3 events
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| Apr 11, 2011 at 12:16 | comment | added | David E Speyer | @Jay True in one sense, false in another. I remember in grad school several of us got interested in computing the group scheme of autmorphisms of an inseparable extension. It's length is more than the degree, although all of that length is nilpotent, so you don't see it in the actual automorphisms. | |
| Apr 27, 2010 at 2:36 | comment | added | Jay | Moreover, the heuristic that there is something weird about the "theory of the automorphism groups" of inseparable extensions. Rather, the automorphisms that do exist are perfectly fine; it's just that inseparable extensions are more rigid, so there are fewer of them. | |
| Mar 5, 2010 at 13:09 | history | answered | Pete L. Clark | CC BY-SA 2.5 |