- #1
dirk_mec1
- 761
- 13
Homework Statement
http://img254.imageshack.us/img254/121/77689018gc3.png
Homework Equations
A space is open iff there is for each x in A a ball (fully) contained within A.
The Attempt at a Solution
If I consider A in [tex] l^{\infty }[/tex] then the sup =1. So for each x there is ball with a radius smaller than 1 contained within A.
Is this correct?
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