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Topology sucks my ass. >:(

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

Name: Anonymous 2009-07-25 14:54

who the hell cares

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)).

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.

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. ;_;

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.

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