David R. Belanger
David R. Belanger
 
 
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Currently Offline
Rarest Achievement Showcase
Items Up For Trade
1,245
Items Owned
96
Trades Made
929
Market Transactions
Comments
Stilicho 12 Mar, 2014 @ 7:39pm 
So what is with the hat?
fan.weixi 25 Feb, 2014 @ 7:24pm 
Show that ZF+"Every countable union of countable sets is countable" does not derive ZF+CC yourself.
DMac 24 Jan, 2014 @ 11:41pm 
@David: Hello David. I hope you are having a nice day. Thank you for the friendship.