I started this thread to post questions about words...not math :P.

I understand what this means but they call it a projection map. Is there something else that goes along with than meets the eyes?

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- Jan 11th 2009, 09:48 PMMathstud28Vocabulary Thread
I started this thread to post questions about words...not math :P.

I understand what this means but they call it a projection map. Is there something else that goes along with than meets the eyes? - Jan 12th 2009, 12:26 AMMoo
I'm not sure I understand what you're asking for... Are you wondering if there is an application of this ? (Surprised)

I can show you one (the first that came in my mind), but it has to do with measure theory (product sigma-algebra). So if you're interested, I can show it...

And Opalg once used them to explain stuff in product topology.

There another way of seeing these functions, it's calling them the coordinates mappings :

(note that it's and not , I don't know how you learnt it, but my teachers always used the second one for defining the function)

- Jan 12th 2009, 04:22 PMMathstud28