/sci/ - Science & Math

>>12242964
Yes. Why?

>>9609632
How can CW complexes be real if Euclidean spaces aren't real?

>>9442049
>g******
What do you mean?

>>9064741
In Baden-Württemberg? Looks nice.

>>9040645
Is 1+a 1? If not, then it exists. My butt instinct is telling me that you aren't baiting, and I find that sensation quite terrifying. Please check the definition of that impossible additive group, and then you will see 1+a indeed is there, for every non-zero element a.

>>9000516
Why? I'd get nothing out of that.

>>8761853
A sigma algebra of [math]\mathbb{R}[/math], perhaps? Given any finite set, all the sigma algebras would be countable.

>>8730945
Yes, that is a topology that would be easily used anywhere, but one source says categories must be small, and the other that the can be whatever. For example, Johnstone defines (pre)sheaves for small categories in his book on topos theory.