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Feb 27, 2017 at 13:38 comment added Ali Caglayan In the UK for example most mathematicians who aren't set theorists tend to take $/Bbb N$ as $/Bbb Z^+$.
Feb 27, 2017 at 13:28 comment added Qfwfq @AliCaglayan: in which sense?
Feb 25, 2017 at 13:59 comment added Ali Caglayan I don't think $\Bbb N$ being a monoid is universally agreed upon.
S Aug 17, 2015 at 13:27 history answered Qfwfq CC BY-SA 3.0
S Aug 17, 2015 at 13:27 history made wiki Post Made Community Wiki by Qfwfq