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HallsofIvy
HallsofIvy is offline
#7
Aug11-08, 04:16 AM
Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 38,879
But his question was, "Why is it not the least upper bound?"

danago, the fact that you are asked to prove that [itex]sup A+B\le \sup A+ \sup B[/itex] does not necessarily imply they are not equal. Only that you are not asked to prove that.