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Feb7-11, 05:13 PM
micromass's Avatar
P: 18,039
Ah nice, I quite missed your videos I really like the videos about nets by the way!

How do you best introduce closure? Hmm, that's not easy. There are three ways to do so:
- the set of all points of closure
- the smallest closed sets containing the original set
- the set of all convergence points of nets

I think the easiest way is the second. But the first way is more often used...