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Feb 15, 2015 at 12:31 history edited Mauro ALLEGRANZA CC BY-SA 3.0
added 359 characters in body
Feb 14, 2015 at 19:20 vote accept peterh
Feb 14, 2015 at 19:15 comment added Andrés E. Caicedo There is a bit more to add, namely that the very definition of cardinality is due to Cantor.
Feb 14, 2015 at 17:54 history answered Mauro ALLEGRANZA CC BY-SA 3.0