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Dec 4, 2010 at 19:30 comment added Jon Yard Thanks Franz. After hours of searching, I cannot find the Wyman article (or really much at all from Scripta mathematica) online. Does anyone know where to find an electronic copy?
Dec 1, 2010 at 19:48 comment added Will Jagy Check this thread, it is amusing and you are involved: $$ $$ tea.mathoverflow.net/discussion/802/a-reputation-table-bug $$ $$
Nov 26, 2010 at 12:21 comment added Franz Lemmermeyer The basic tool for understanding this problem is the theorem of Weil-Shafarevich, which gives the cohomological invariant describing the group extension. A good source for this result are the notes by Artin-Tate.
Nov 25, 2010 at 9:35 history answered Franz Lemmermeyer CC BY-SA 2.5