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| ``Re: Cartesian product''
by drini on 2004-10-01 12:30:02 |
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I guess it kinda makes sense to use different symbols when dealing with different kinds of products at once, but I still claim that the "\bigtimes" is much rare compared to \product which is used in most cases.
But as I noted also, in algebra (say in groups, modules, etc) usually directproduct (\oplus) is sometimes exchanged with \times
But returning to the original point (topological spaces), in tha particular concept I've always seen \product (PI) to denote arbitrary product of topological spaces
HOWEVER, at least in a particular instance I've seen a white box (like the ones at end of proofs) to denote product in the box topology
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f |
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