Class (set theory): Revision history

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curprev 14:2914:29, 6 June 2024‎ Georgydunaev talk contribs‎ 9,118 bytes +2‎ NBG is a conservative extension of ZFC, not just ZF, as it was written. In NBG, the global choice follows from the limitation of size axiom. undo Tag: Visual edit

curprev 06:3306:33, 2 June 2024‎ David Eppstein talk contribs‎ 9,116 bytes −90‎ →‎Paradoxes: rm off-topic aside undo
curprev 06:3006:30, 2 June 2024‎ David Eppstein talk contribs‎ 9,206 bytes +371‎ add a ref from our conglomerate article undo

curprev 05:2605:26, 1 June 2024‎ AnomieBOT talk contribs‎ m 8,835 bytes +15‎ Dating maintenance tags: {{Citation needed}} undo
curprev 05:0605:06, 1 June 2024‎ C7XWiki talk contribs‎ 8,820 bytes +552‎ →‎Classes in formal set theories undo

curprev 22:4622:46, 9 May 2024‎ 108.172.186.57 talk‎ 8,268 bytes −94‎ No edit summary undo

curprev 15:4915:49, 26 February 2024‎ 185.72.113.181 talk‎ 8,362 bytes −1‎ minor: "especially" for the wrong writing "espescially" undo

curprev 10:2310:23, 9 February 2024‎ AntiDionysius talk contribs‎ m 8,363 bytes +226‎ Reverted edit by 2806:230:2038:BEAC:38B0:A578:5EBE:4E68 (talk) to last version by PicoMath undo Tag: Rollback
curprev 10:1710:17, 9 February 2024‎ 2806:230:2038:beac:38b0:a578:5ebe:4e68 talk‎ 8,137 bytes −226‎ No edit summary undo Tags: Reverted Mobile edit Mobile web edit
curprev 01:0301:03, 9 February 2024‎ PicoMath talk contribs‎ 8,363 bytes +22‎ →‎Examples: Added it was also known as the "universal class" undo Tag: Visual edit

curprev 22:2822:28, 31 January 2024‎ PicoMath talk contribs‎ 8,341 bytes +23‎ No edit summary undo Tag: Visual edit
curprev 14:0614:06, 31 January 2024‎ Quondum talk contribs‎ 8,318 bytes +130‎ fmt; fixing wrapping punc after <math> using {{tmath}} undo

curprev 23:5623:56, 11 April 2023‎ 2601:447:c601:3690:f073:2ad2:c31a:a4b6 talk‎ 8,188 bytes +2‎ No edit summary undo

curprev 15:3015:30, 6 December 2022‎ Kku talk contribs‎ m 8,186 bytes +4‎ link [cC]ardinal number undo

curprev 17:5217:52, 20 June 2022‎ Serols talk contribs‎ m 8,182 bytes −10‎ Reverted edits by 117.99.241.251 (talk) (HG) (3.4.10) undo Tag: Rollback
curprev 17:5217:52, 20 June 2022‎ 117.99.241.251 talk‎ 8,192 bytes +10‎ No edit summary undo Tags: Reverted Mobile edit Mobile web edit

curprev 18:3818:38, 1 May 2022‎ Ordinest talk contribs‎ m 8,182 bytes +27‎ Added link for "property". undo

curprev 00:2100:21, 21 February 2022‎ Hairy Dude talk contribs‎ 8,155 bytes +23‎ capitalisation etc. undo Tags: Mobile edit Mobile web edit Advanced mobile edit

curprev 15:5815:58, 20 December 2021‎ Tea2min talk contribs‎ 8,132 bytes +823‎ Undid revision 1061247140 by 103.126.218.166 (talk) undo Tag: Undo
curprev 15:3715:37, 20 December 2021‎ 103.126.218.166 talk‎ 7,309 bytes −823‎ (edit summary removed) undo Tags: Reverted references removed Mobile edit Mobile web edit

curprev 23:4623:46, 26 September 2021‎ Jmcclaskey54 talk contribs‎ m 8,132 bytes +3‎ minor word changes for clarity and flow undo Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

curprev 17:1017:10, 19 August 2021‎ Rgdboer talk contribs‎ 8,129 bytes +199‎ cite Russell Principles of Mathematics undo

curprev 17:2617:26, 29 July 2021‎ 128.252.101.222 talk‎ 7,930 bytes +1‎ No edit summary undo

curprev 14:5814:58, 18 July 2021‎ Fizykz talk contribs‎ 7,929 bytes +149‎ Added a clarifying statement at the introduction. Intro caused unnecessary confusion by saying it is a collection of sets without bothering to say why a class is needed (when a set is already similar). undo Tag: Visual edit

curprev 17:1117:11, 21 December 2020‎ Monkbot talk contribs‎ m 7,780 bytes +2‎ Task 18 (cosmetic): eval 3 templates: hyphenate params (2×); undo Tag: AWB

curprev 18:0918:09, 22 November 2020‎ GenQuest talk contribs‎ m 7,778 bytes +5‎ Cleaned up using AutoEd undo
curprev 18:0818:08, 22 November 2020‎ GenQuest talk contribs‎ 7,773 bytes +111‎ Importing Wikidata short description: "Collection of sets in mathematics that can be defined based on a property of its members" (Shortdesc helper) undo

curprev 15:0515:05, 27 February 2020‎ Joel Brennan talk contribs‎ m 7,662 bytes +39‎ →‎Classes in formal set theories undo
curprev 14:5814:58, 27 February 2020‎ Joel Brennan talk contribs‎ m 7,623 bytes +63‎ →‎Examples undo

curprev 23:1023:10, 3 October 2019‎ Joel Brennan talk contribs‎ m 7,560 bytes +5‎ →‎Classes in formal set theories: punctuation better in math mode undo

curprev 09:2109:21, 31 August 2019‎ 109.166.134.237 talk‎ 7,555 bytes +10‎ →‎Paradoxes: kind of premisse undo

curprev 04:0404:04, 1 June 2019‎ Arthur Rubin talk contribs‎ 7,545 bytes +4‎ Undid revision 898760887 by GeoffreyT2000 (talk) article uses mathematics _incorrectly_. In the context of set theory, it's only used in the context of category theory. undo Tag: Undo

curprev 19:1219:12, 25 May 2019‎ GTrang talk contribs‎ m 7,541 bytes −4‎ →‎Paradoxes: Bypassing redirect (article uses "(mathematics)", not "(category theory)"). undo
curprev 19:0119:01, 25 May 2019‎ GTrang talk contribs‎ 7,545 bytes −36‎ →‎Classes in formal set theories: Removed statement that is no longer being contrasted. undo

curprev 21:0921:09, 21 May 2019‎ AnomieBOT talk contribs‎ m 7,581 bytes +14‎ Dating maintenance tags: {{Cn}} undo
curprev 20:4820:48, 21 May 2019‎ Arthur Rubin talk contribs‎ 7,567 bytes +183‎ Undid revision 898091533 by Arthur Rubin (talk) but deleted one of the two instances of conglomerate, and noted the _theory_ of conglomerates is not well-established. And request a citation. undo Tag: Undo
curprev 10:0010:00, 21 May 2019‎ Arthur Rubin talk contribs‎ 7,384 bytes −203‎ Reverted good faith edits by Verdy p: (1) Requires a source. (2) Should only be in one of those. (3) Conglomerate (set theory) is incorrect. If it is to be included, conglomerate (category theory) might be used. (TW) undo Tag: Undo
curprev 05:4905:49, 21 May 2019‎ Verdy p talk contribs‎ 7,587 bytes +203‎ Undid revision 893645520 by Arthur Rubin (talk) restore the removed statements which are relevant (classes as members, not of classes but of conglomerates) undo Tag: Undo

curprev 16:3216:32, 14 May 2019‎ 194.75.72.34 talk‎ 7,384 bytes +1‎ No edit summary undo
curprev 16:3016:30, 14 May 2019‎ 194.75.72.34 talk‎ 7,383 bytes +43‎ No edit summary undo
curprev 16:2116:21, 14 May 2019‎ 194.75.72.34 talk‎ 7,340 bytes 0‎ No edit summary undo
curprev 16:1816:18, 14 May 2019‎ 194.75.72.34 talk‎ 7,340 bytes +278‎ No edit summary undo

curprev 18:2118:21, 22 April 2019‎ Arthur Rubin talk contribs‎ 7,062 bytes −203‎ Remove "conglomerate" as statements are inaccurate in actual set theories undo

curprev 15:3515:35, 27 March 2019‎ Tea2min talk contribs‎ 7,265 bytes +806‎ Undid revision 889708910 by 81.183.92.154 (talk) undo Tag: Undo
curprev 12:4812:48, 27 March 2019‎ 81.183.92.154 talk‎ 6,459 bytes −806‎ →‎Paradoxes undo

curprev 01:5501:55, 23 November 2018‎ Paper wobbling sound talk contribs‎ m 7,265 bytes −2‎ →‎Classes in formal set theories: removed periods in formulas that should not be in these formulas. E.g., n the first one, compare with the formula for the axiom schema of separation as found in its Wikipedia article. undo

curprev 12:3012:30, 21 November 2018‎ Tea2min talk contribs‎ 7,267 bytes −909‎ Undid revision 869947695 by Verdy p (talk): You got it exactly backwards. As explained in the lead section, a proper class is a class that is *not* a set. And the ordinal numbers are not just the positive integers, there are much bigger ordinals than ω, the order type of the natural numbers. is the smallest infinite ordinal number undo Tag: Undo
curprev 11:3211:32, 21 November 2018‎ Verdy p talk contribs‎ 8,176 bytes +909‎ Undid revision 869931770 by Tea2min (talk) "Every class is a set" is false, yes, but "every set is a class" is certainly true ! Sets form a subclass of classes, defined by the set-membership property which is enough to define a class. So the set of integers is also a class (and a proper one); the set of all sets is a class, but not a proper class undo Tag: Undo
curprev 08:3408:34, 21 November 2018‎ Tea2min talk contribs‎ 7,267 bytes −909‎ Reverted good faith edits by Verdy p: I'm sorry, but these changes appear to me quite confused: the (proper) class of all ordinal numbers is much bigger than the set of positive integers, and the rational numbers form a set and therefore by definition not a proper class. (TW) undo Tag: Undo
curprev 00:5900:59, 21 November 2018‎ Verdy p talk contribs‎ 8,176 bytes +14‎ →‎Examples undo

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