Topology sucks my ass. >:(
1
Name:
Anonymous
2009-07-25 8:44
If X,Y,Z are topological spaces, and f: X x Y -> Z is a continuous map, then for a fixed y in y, is g(x) := f(x,y) necessarily continuous as a function from X -> Z?
It better be, or else I'm even more confused than I thought. Oh, and X, Y, and Z are Hausdorff, but I don't know if it matters.
And no, it's not homework, so stfu about that. :p
2
Name:
Anonymous
2009-07-25 14:54
who the hell cares
3
Name:
Anonymous
2009-07-25 15:39
Yes it is continuous.
A restriction of a continuous function is still continuous, since keeping within delta of (x,y) still keeps you within epsilon of (f(x),f(y)).
4
Name:
Anonymous
2009-07-25 15:46
Err, sorry, accidentally phrased that in terms of metric spaces. Meant to say:
g(x) = f(i(x)) where i(x) = (x,y).
f is continuous and y is continuous by the definition of the product topology so g is continuous.
5
Name:
Anonymous
2009-07-25 15:48
WLDLWMDLKMWD£$~"$£$%£%~"@$£
f is continuous and i is continuous by the definition of the product topology so g is continuous.*
I'm a retard today. ;_;
6
Name:
Anonymous
2009-07-25 22:42
>>5
FFUUUUUUU, yeah, that works. I'm such a tard lol. >_>
You don't want to know how long I spent staring blankly at that last night. Thanks so much.