User contributions for Jochen Burghardt
A user with 23,666 edits. Account created on 18 August 2012.
20 December 2024
- 11:5111:51, 20 December 2024 diff hist −31 Arkhangelsky (surname) No edit summary current
- 11:3411:34, 20 December 2024 diff hist 0 Bird–Meertens formalism Undid revision 1264006885 by 2601:201:8404:9180:F968:1DA8:9D85:DF4A: "calculation" if definitely wrong; may be proof calculus is the least inadequate article covering the intended meaning current
19 December 2024
- 13:4613:46, 19 December 2024 diff hist 454 Talk:Computational complexity of matrix multiplication →Feasible matrix multiplication, vs galactic algorithms: Reply current Tag: Reply
- 13:1813:18, 19 December 2024 diff hist −28 Turing machine →Formal definition: the name is defined right here, so we don't need a wikilink for it current
17 December 2024
- 16:2616:26, 17 December 2024 diff hist 54 Pierre Lecoq →top: commons img
- 16:0116:01, 17 December 2024 diff hist 38 Equality (mathematics) →Basic properties: use explicit quantification to express function equality (the implication has an overly restricted antecedent, but this is ok for an example, imo)
16 December 2024
- 13:2613:26, 16 December 2024 diff hist −27 Expression (mathematics) →Lambda calculus: rm repeated links; lambda calculus consists of abstraction and application; BTW: Richardson's theorem is irrelevant for lambda calculus, and should be moved to a more appropriate place
- 13:0913:09, 16 December 2024 diff hist 0 Mojżesz Presburger →top: birthday 27-->17, cf also https://www.mimuw.edu.pl/~bojan/presburger/CV.JPG current
15 December 2024
- 20:4620:46, 15 December 2024 diff hist −8 Equality (mathematics) →Equations: suggest to avoid speaking of objects here (imo, an object corresponds to a variable-free term); fix grammar; singular is more clear
- 18:1918:19, 15 December 2024 diff hist −26 Gödel's incompleteness theorems Undid revision 1262931885 by SeekerVI (talk) current Tag: Undo
11 December 2024
- 16:4416:44, 11 December 2024 diff hist 291 Fixed point (mathematics) undid 2 edits: found the link still alive (and redirecting to http://yutaka-nishiyama.sakura.ne.jp) ; replacing by {{cite}}
10 December 2024
- 21:3921:39, 10 December 2024 diff hist −444 Universal quantification →Basics: the "etc" requires the reader to guess which sequence the author had in mind, and therefore is not formalizable; any possible formalization requires a language element similar to a univarsal quantifier current
- 21:3021:30, 10 December 2024 diff hist −428 Piecewise function →top: rm sentences that tacitly assume P to be a property of f at some given point; this doesn't make sense e.g. for "constant" ("f is constant at x"),
- 21:1521:15, 10 December 2024 diff hist 240 Talk:Kleene's algorithm →Kleene's theorem: Reply current Tag: Reply
9 December 2024
- 19:2719:27, 9 December 2024 diff hist 702 Talk:Kleene's algorithm →Kleene's theorem: Reply Tag: Reply
- 19:2519:25, 9 December 2024 diff hist 7 Arden's rule →Application
8 December 2024
- 12:5212:52, 8 December 2024 diff hist 844 Talk:Equivalence class →Lp space: Reply Tag: Reply
7 December 2024
- 17:3817:38, 7 December 2024 diff hist −191 Equivalence class Undid revision 1261729187 by Roffaduft (talk): L^{p}(X,\Sigma,\mu) was introduced here has a set of functions; of course then its quotient set (called \mathcal{L}^{p}(X,\Sigma,\mu) here) is a set of equivalence classes Tag: Undo
- 17:2117:21, 7 December 2024 diff hist 167 Talk:Congruence relation →Categorical usage: Reply current Tag: Reply
- 17:2017:20, 7 December 2024 diff hist 347 Congruence relation →Category theory: as requested on talk page
- 17:1017:10, 7 December 2024 diff hist −60 Inequality (mathematics) Undid revision 1261685031 by 94.190.218.87 (talk): "exercises" is more precise current Tag: Undo
- 17:0917:09, 7 December 2024 diff hist −191 Equivalence class →Examples: make definition explicit; no need to re-state general consequences about quotient set (moreover, "consists of" is likely to be misread as "is the set of all", while "is the union of all" is meant) Tag: Reverted
- 16:5916:59, 7 December 2024 diff hist −27 Lambda calculus →Explanation and applications: avoid adjacent links; the previous link programming language theory should be sufficient
- 16:5516:55, 7 December 2024 diff hist −122 Lambda calculus rm of of the repeated wikilinks
5 December 2024
- 11:4411:44, 5 December 2024 diff hist −5 Well-order Undid revision 1261298210 by JBW (talk): found Nubtom's argument more convincing: saying (in both versions) that a set can have different order types implies that orders can be imposed subsequently on a set current Tag: Undo
- 11:3511:35, 5 December 2024 diff hist −38 Gödel's completeness theorem Undid revision 1261225437 by Tule-hog (talk): this is obvious: provable in S1 <--> valid <--> provable in S2 Tags: Undo Reverted
- 11:3211:32, 5 December 2024 diff hist 24 Absolute infinite Undid revision 1261201388 by EliteCameraBuddy (talk) current Tag: Undo
4 December 2024
- 17:0917:09, 4 December 2024 diff hist 71 Negation →top
2 December 2024
- 10:3810:38, 2 December 2024 diff hist −33 m Parsing Reverted 2 edits by 2806:10BE:7:DCAD:D8A8:E747:4D2E:A114 (talk) to last revision by Grayfell current Tags: Twinkle Undo
- 10:3810:38, 2 December 2024 diff hist −48 Variety (universal algebra) No edit summary current Tag: Undo
30 November 2024
- 16:5216:52, 30 November 2024 diff hist 0 Subtyping Undid revision 1260360580 by Arkticular-fox (talk): was right before current Tag: Undo
- 16:4516:45, 30 November 2024 diff hist −6 Thompson's construction Undid revision 1260247842 by 148.63.103.171 (talk) current Tag: Undo
29 November 2024
- 11:0311:03, 29 November 2024 diff hist 112 Wikipedia:2024 open letter to the Wikimedia Foundation →Signatures
- 10:3410:34, 29 November 2024 diff hist −41 Ambiguous grammar →Inherently ambiguous languages: repeat source from sentence beginning (checked that sect./p. indeed fit); mv negation to avoid MOS:MATH#ANY
- 10:2210:22, 29 November 2024 diff hist 9 Finite-state machine →Acceptors: you just deleted the citation you then asked for
- 10:1610:16, 29 November 2024 diff hist 332 Talk:Gödel's incompleteness theorems →Provability: Reply current Tag: Reply
- 10:1210:12, 29 November 2024 diff hist −7 Gödel's incompleteness theorems →top: suggest to defer explanation of "proof" to next paragraph, giving a wikilink to the introductory article there (rather than to the more adequate, but harder to understand article formal proof)
28 November 2024
- 09:2109:21, 28 November 2024 diff hist −31 Value (computer science) Undid revision 1259970431 by 176.142.102.63 (talk) current Tag: Undo
27 November 2024
- 19:4119:41, 27 November 2024 diff hist 226 Talk:New riddle of induction →definitions of grue and bleen unclear: Reply Tag: Reply
- 19:3619:36, 27 November 2024 diff hist −17 Otfrid Mittmann →top: Poland can be seen from the Ruda Śląska article; Germany is unconfirmed by sources (or did I overlook something?) current
- 12:0112:01, 27 November 2024 diff hist 209 Raven paradox →top: while one citation might be sufficient, it may be interesting that apparently Goodman (1973) took over Watanabe's (1969) term current
- 11:4711:47, 27 November 2024 diff hist 1,147 Talk:New riddle of induction →definitions of grue and bleen unclear: Reply (also to discussion at Talk:Problem_of_induction#definition of grue wrong Tag: Reply
- 11:1411:14, 27 November 2024 diff hist 343 Talk:Problem of induction →definition of grue wrong: Reply Tag: Reply
- 09:3409:34, 27 November 2024 diff hist 215 Talk:New riddle of induction →definitions of grue and bleen unclear: Reply Tag: Reply
- 09:3009:30, 27 November 2024 diff hist −18 Turing machine partly undid revision 1259823624 by Darcourse (talk): I feel that the {L,R} variant occurs more often than the {L,N,R} variant; however, we needn't judge on that here
- 09:2609:26, 27 November 2024 diff hist 99 Problem of induction Undid revision 1259798259 by Remsense (talk): not an improvement, cf. discussion at Talk:New_riddle_of_induction#definitions_of_grue_and_bleen_unclear current Tag: Undo
- 09:2109:21, 27 November 2024 diff hist −817 Inductive reasoning Undid revision 1259795820 by Leozoroaster (talk): 2nd reference seems wrong (doi points to article "The Weighted Majority Algorithm") and too old (20 years before the recent advance, what could be its purpose?); please re-add your contribution after fixing that Tag: Undo
26 November 2024
- 21:5521:55, 26 November 2024 diff hist 659 Talk:New riddle of induction →definitions of grue and bleen unclear: Reply Tag: Reply
- 21:3021:30, 26 November 2024 diff hist 1 Function composition mv down to Examples section current
- 21:2121:21, 26 November 2024 diff hist −171 First-order logic Undid revision 1259527077 by Hellomtfk (talk): if this is relevant at all, it needs a reliable source Tag: Undo