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when toggle format what by license comment
Apr 19, 2012 at 19:48 answer added Bazin timeline score: 1
Sep 10, 2010 at 18:16 comment added Piero D'Ancona There are whole books on this. Give a try at Runst and Sickel, "Sobolev spaces of fractional order etc"
Sep 10, 2010 at 17:15 history asked Arturo Sanjuán CC BY-SA 2.5