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nLab > Latest Changes: closed subspace

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  1.  
    • CommentRowNumber1.
    • CommentAuthorTodd_Trimble
    • CommentTimeAug 17th 2015

    At closed subspace, I added some material on the 14 operations derivable from closures and complements. For no particularly great reason except that it’s a curiosity I’d never bothered to work through until now.

    • CommentRowNumber2.
    • CommentAuthorTodd_Trimble
    • CommentTimeAug 18th 2015

    I’ve been adding more assorted observations to closed subspace, interior, and boundary.

    • CommentRowNumber3.
    • CommentAuthorTodd_Trimble
    • CommentTimeAug 19th 2015

    Also Thomas Holder added some nice material at boundary in a section “Some ramifications”.

    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeMar 17th 2017

    the entry closed subspace used to request a link to law of double negation. To un-gray the link, I have created such an entry.

    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeApr 10th 2017
    • (edited Apr 10th 2017)

    in the vein of adding elementary proofs of basic facts in topology, I added statement and proof for metric spaces of the characterization of closed subspaces via converging sequences, here

    • CommentRowNumber6.
    • CommentAuthorDmitri Pavlov
    • CommentTimeApr 19th 2020

    Added a redirect.

    diff, v40, current

    • CommentRowNumber7.
    • CommentAuthorUrs
    • CommentTimeAug 14th 2020

    Fixed wrong wording in the proof of this Prop..

    diff, v41, current

1 to 7 of 7

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