Open sets
0:44
Added: 5 years ago
From: bothmer
Views: 12,410
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  • 0:18 looks like an ass :D

    SrOrigami 1 year ago

  • Great balls of fire!

    sandman98756 3 years ago 3

  • I think that's how babies are formed :)

    lazmedina 3 years ago

  • Intersection of open sets is open. OK got it.

    thefuturebird 4 years ago

  • Thank god I am not in hanover u.

    intelite 4 years ago

  • Por fin alguien explica la genesis de los huesos de melocotón!

    joliteal 4 years ago

  • That's an excellent allegory for open sets -- thanks.

    I believe your remarks need to be changed to finite intersections and arbitrary unions of open sets are open sets.

    For example, please consider the countable intersection of (-1/n, 1/n) for n = 1, 2, 3, ...

    Its intersection is { 0 }, which is a closed set.

    kstahmer 5 years ago 4

  • Sure! I clarified the explanation as you suggest.

    bothmer 5 years ago

  • Comment removed

    lapk78 3 years ago

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