Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**JaneFairfax****Member**- Registered: 2007-02-23
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*Last edited by JaneFairfax (2008-10-08 09:11:22)*

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**Ricky****Moderator**- Registered: 2005-12-04
- Posts: 3,791

How about a similar statement for open sets?

"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."

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