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when toggle format what by license comment
Apr 23, 2013 at 20:28 answer added Jim Humphreys timeline score: 2
Apr 23, 2013 at 18:25 comment added Dietrich Burde It is called a Siegel set (Carl Ludwig Siegel), see also mathoverflow.net/questions/124013/…
Apr 23, 2013 at 18:21 history asked ronggang CC BY-SA 3.0