
#1
Jun607, 12:52 PM

P: 2

This question links to a former discussion on the board. I'm confused regarding this thread:
http://http://www.physicsforums.com/showthread.php?t=3622 Specifically, towards the end of the thread, the asker states (in regards to the union notation originally cited): "....if we say that x is an element of the union of those sets, then we know x is an element of at least one of those sets. " I thought the "or" conditional of the union meant that one (and only one) match occurs for x for the notation to be true. I could be wrong.... 



#2
Jun607, 01:14 PM

P: 461

Nope. "Or" always means nonexclusive or.




#3
Jun607, 01:43 PM

P: 2

Got it, thanks....



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