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    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeOct 25th 2012

    gave the old entry wedge sum its explicit formal definition. Also added two examples.

    • CommentRowNumber2.
    • CommentAuthorTobyBartels
    • CommentTimeOct 25th 2012

    I edited so that the Idea section isn't broken into cases; it's all one idea. (The diff makes it look like I edited more heavily than I really did!)

    • CommentRowNumber3.
    • CommentAuthorTobyBartels
    • CommentTimeNov 19th 2019

    Add Wikipedia for reference.

    diff, v10, current

    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeJun 11th 2022

    added a textbook account:

    • {#Munkres75} James Munkres, §71 of: Topology, Prentice Hall 1975 (2000) [[pdf]]

    but need to find a better one, as Munkres makes it sound as if the definition only applies to circles.

    diff, v13, current

    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeJun 11th 2022

    added pointer to

    (still not what I was looking for: this gives the general definition, but it’s too brief to be useful for the novice)

    diff, v13, current

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