Hi all,

I'm just wondering if you could show me how to prove this statement. Obviously, it's intuitively clear but I just can't get a proof working for it:

Closure(B(1,a)) = { x in R^n: |x-a| <= 1 }

Thanks a lot!

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- Sep 18th 2011, 08:32 PMAKTiltedClosure Proof
Hi all,

I'm just wondering if you could show me how to prove this statement. Obviously, it's intuitively clear but I just can't get a proof working for it:

Closure(B(1,**a**)) = { x in R^n: |**x**-**a**| <= 1 }

Thanks a lot! - Sep 18th 2011, 08:53 PMDrexel28Re: Closure Proof
- Sep 18th 2011, 09:14 PMAKTiltedRe: Closure Proof
Does this line of logic work?

If I assume that the closure of the ball, B(1,a) = { x in R^n: |x-a| <= 1 } and then go to prove that this is closed? - Sep 18th 2011, 09:30 PMDrexel28Re: Closure Proof
- Sep 18th 2011, 09:43 PMAKTiltedRe: Closure Proof
Basically this:

If I can prove that { x in R^n: |x-a| <= 1 } is a closed set, can I use this to state that Closure(B(1,a)) = { x in R^n: |x-a| <= 1 }? - Sep 18th 2011, 09:57 PMDrexel28Re: Closure Proof