Talk:Kazimierz Kuratowski

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Did Kuratowski's original description of topological spaces with closure operators really apply only to separated spaces? The modern version certainly applies to any topological space. -- Toby Bartels, Thursday, May 23, 2002


 * That is my understanding. The fact that Kuratowski's closure applied only to Hausdorff spaces is mentioned in
 * Hocking and Young, Topology, ISBN 0486656764
 * -- Miguel

The statement of Kuratowski's theorem about planar graphs that was given here was incorrect. See Talk:planar graph. AxelBoldt 00:52 13 Jun 2003 (UTC)

Biography
This whole section needs to be rewritten. For one, it is barely chronological. Angry bee (talk) 06:01, 7 February 2011 (UTC) Forget not being chornolgoglogyical, it's really hard to read. PARAGRAPHS AND BULLET POINTS. They help. 81.131.112.223 (talk) 23:51, 30 March 2011 (UTC)


 * Ay, you're right, it's a complete mess.  Volunteer Marek   20:41, 18 November 2011 (UTC)

The sentence "This was the subject of a French doctoral thesis written by Zygmunt Janiszewski." is not clear. French?? And did Janiszewski write Kuratowski's thesis or just supervised it, until he died? HarDan (talk) 09:24, 24 January 2024 (UTC)

contibutions section
From the article, "...His contributions to mathematics include:... identification of the ordered pair (x,y) with the set {{x},{x,y}};"

That may be true, but I've heard Norbert Weiner did something with that as well.24.7.28.186 (talk) 20:29, 18 November 2011 (UTC)
 * Never mind, in fact that's what Wiener article explains, and that Kuratowski put it into its present form.24.7.28.186 (talk) 20:41, 18 November 2011 (UTC)

1920 article is not about topology
I found the title and volume/date/journal for Kuratowski's 1920 article about finite sets in parentheses just after the sentence about "an axiomatic construction of topology via the closure axioms". However, this article has nothing at all on this subject. This 1920 article only introduces the Kuratowski finiteness definition and shows that it is equivalent to the standard numerical definition of finiteness. It's only 2 pages and 7 lines long, and it's about set theory only.

I have added a bibliographic reference for this significant article. However, it is not connected with the topology at all. So maybe someone who knows about Kuratowski's topology contributions could fix that up. I think the 1920 paper should remain in the bibliography on this page, but not at that location in the article. --Alan U. Kennington (talk) 10:23, 8 August 2014 (UTC)