David R. Belanger
David R. Belanger
Momenteel offline
Opmerkingen
Stilicho 12 mrt 2014 om 19:39 
So what is with the hat?
fan.weixi 25 feb 2014 om 19:24 
Show that ZF+"Every countable union of countable sets is countable" does not derive ZF+CC yourself.
DMac 24 jan 2014 om 23:41 
@David: Hello David. I hope you are having a nice day. Thank you for the friendship.