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Talk:Adjunction space

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Untitled

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The first example probably was an attempt to show how all CW-complexes are built up, but the description was too vague so I replaced it with a specific example of a CW-complex which is easier to describe for now. - Gauge 05:42, 2 Jun 2005 (UTC)

disjoint union

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At the risk of being fussy, I suggest that the symbol for disjoint union operation be changed to or from the present to be consistent with the article Disjoint union. - Subh83 (talk | contribs) 19:51, 26 April 2011 (UTC)[reply]

Never mind that. The present notation is the standard for topological spaces. - Subh83 (talk | contribs) 19:55, 26 April 2011 (UTC)[reply]
Well, I studied quite a bit of topology (years ago) and the symbol confused me - it looks like a damaged upper-case with Roman lettering type serifs or . Perhaps we could link the symbol to the article Disjoint union? yoyo (talk) 08:34, 16 November 2015 (UTC)[reply]

Some history, please

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We need more information in the article, for example:

  • What's the history of the term "adjunction space"?
  • Who first used it?
  • Who first defined it?
  • Why use "adjunction"?
  • And does it relate to a natural notion of "adjunct" elements in the space?
  • If so, how is the adjunct element defined?

yoyo (talk) 10:14, 16 November 2015 (UTC)[reply]