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The boundary of a line segment is its end points. Intuitively, it a line doesn't have end points, then it's a loop i.e. a closed curve without boundary
by enchiridion 7y ago
The boundary of a line segment is its end points. Intuitively, it a line doesn't have end points, then it's a loop i.e. a closed curve without boundary
- Enginerrrd 7y agoI've definitely been deep into some topology proofs where I suddenly proved a true fact couldn't possibly be true and then I realized I'd forgotten that not open doesn't imply not closed or something. It's funny the tricks that plays on your brain even when you know better.