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October 30th, 2009, 06:40 PM  #1 
Newbie Joined: Aug 2009 Posts: 16 Thanks: 0  what is the difference? cartesian product tensor product etc
hi guys! when dealing with linear spaces one often bumps into having to define those merging of spaces... what to use? is tensor product analogue to cartesian product, but with some extra properties? and what about direct sum? and other operations? for example, the tangent bundle TS^1of the circle S^1. that is homeomorphic to what, S^1 x R? or would that be S^1 tensor R? or something else? thank you so much. 

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cartesian, difference, product, tensor 
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