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**List of abbreviations (help):**

- D
- Edit made at Wiki
__d__ata - r
- Edit flagged by O
__R__ES - N
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- Minor edit
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- Bot edit
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*±123*) - Page byte size change
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#### 20 April 2021

- m Open set 09:19 −23 DoebLoggs talk contribs Reverted edits by 212.59.38.94 (talk) to last version by 104.220.168.111 Tag: Rollback
- Open set 09:18 +23 212.59.38.94 talk Tags: Mobile edit Mobile web edit Reverted

#### 19 April 2021

- Projection (linear algebra) 14:55 +9 Wakabaloola talk contribs →Finding projection with an inner product

#### 18 April 2021

- m Fourier series 16:58 0 Bob K talk contribs →Table of common Fourier series: force figures to update
- Fourier series 16:51 0 Bob K talk contribs →Table of common Fourier series: update symbol for signal period Tag: Visual edit
- Function (mathematics) 15:31 −50 Pppery talk contribs Only ambiguous with the girl group, not other meanings of "function"
- m Fourier series 12:17 0 Bob K talk contribs →Table of common Fourier series: Eq.1 is the actual definition
- m Eccentricity (mathematics) 11:42 +54 Mwtoews talk contribs Reverted edits by 103.217.240.163 (talk) to last version by ClueBot NG Tag: Rollback
- Eccentricity (mathematics) 09:55 −2 103.217.240.163 talk →Definitions Tags: Mobile edit Mobile web edit Reverted
- Eccentricity (mathematics) 09:54 −1 103.217.240.163 talk →Definitions Tags: Mobile edit Mobile web edit Reverted
- Eccentricity (mathematics) 09:54 −51 103.217.240.163 talk →Definitions Tags: Mobile edit Mobile web edit Reverted
- Fourier series 09:12 0 PlasticStylus talk contribs Corrected an equation reference and changed the coefficient formula for a half-sine rectified wave, to match what the reference says. Tag: Visual edit: Switched
- m Continuous function 04:32 −3 Goszei talk contribs General fixes Tag: AWB
- Architecture 04:10 +231 Qiushufang talk contribs →Theory of architecture
- Wikipedia:Citation needed 02:06 +22 Facts707 talk contribs →top: aka NEEDCITE

#### 17 April 2021

- Derivative 16:38 +65 D.Lazard talk contribs →Notation: fixing rendering
- Analytic continuation 16:31 +25 Hellacioussatyr talk contribs →Initial discussion Tags: Mobile edit Mobile web edit Advanced mobile edit
- m Derivative 15:38 +26 Walrusmcd talk contribs →Notation: changed formatting and sentence structure of lagrange notation to match the surrounding leibniz and newton. content unchanged. reads much better now. Tag: Visual edit: Switched
- Function (mathematics) 15:32 −4 Laiwoonsiu talk contribs →Notation: Based on the discussions at Talk:Function_(mathematics)#Notation, I have revised the "long-winded" statement as per standard textbooks.
- Meagre set 01:56 −40 Mgkrupa talk contribs Copy editing
- m Tangent space 01:23 −4 Anita5192 talk contribs ce: single quotation mark → double quotation mark, in three places
- Tangent space 00:58 −10 Quondum talk contribs →Informal description: fmt

#### 16 April 2021

- Function (mathematics) 22:14 +2 199.167.89.16 talk →Definition: added a missing article
- Open set 20:38 +1 104.220.168.111 talk undo
- Range of a function 12:58
**+657** Tea2min talk contribs →top: Add inline definition of the terms to the lead section. - Range of a function 12:43 0 Tea2min talk contribs →top: Move link out of bolded repetition of article title.
- Bézier curve 10:00 +277 Jdfekete talk contribs Clarified that Bézier invented his curves without knowing de Casteljau
- Function (mathematics) 09:35 −19 Jochen Burghardt talk contribs →Definition: moving "such that" to better indicate structure of sentence; footnote needn't repeat the prev. sentence, adding an examply (surjectivity) instead; defuse seeming contradiction function ≠/= graph to "usually"/"occasionally" - "formally speaking" was certainly wrong
- Function (mathematics) 08:47 +152 Jochen Burghardt talk contribs →Definition: introduce notation "f:X->Y"
- Function (mathematics) 08:29 +247 Jochen Burghardt talk contribs →Definition: unifying style to {{math}} at least for this section
- m Mathematical analysis 07:06 +5 Goszei talk contribs General fixes Tag: AWB
- m Aesthetics 06:19 −2 Goszei talk contribs →top: General fixes Tag: AWB

#### 15 April 2021

- m Ellipse 17:43
**+2,397** RacoonyRE talk contribs Reverted edits by 145.249.143.189 (talk): unexplained content removal (HG) (3.4.10) Tag: Rollback - Ellipse 17:42
**−2,397** 145.249.143.189 talk Tags: Mobile edit Mobile web edit Reverted - m Ellipse 17:42
**+1,303** RacoonyRE talk contribs Reverted edits by 145.249.143.189 (talk) (HG) (3.4.10) Tag: Rollback - Ellipse 17:42
**−1,303** 145.249.143.189 talk Tags: Mobile edit Mobile web edit Reverted - Function (mathematics) 09:20 +43 Jochen Burghardt talk contribs Undid revision 1017884397 by Laiwoonsiu (talk): tacitly assuming a squaring operation on an arbitrary set X is confusing; restoring old verion for now, and starting a discussion at Talk:Function_(mathematics)#Notation Tag: Undo
- Function (mathematics) 03:49 −43 Laiwoonsiu talk contribs We need to be mathematically correct in the "long-winded" sentence because we are criticizing others for the abuse of notation. As a compromise with WP:TECHNICAL. I have replaced f:R -> R by f:X -> Y for the following reasons: (a) The general audience may not know that \mathbb{R} denote the set of real numbers. (b) f:X -> Y is used throughout rest of this Wiki article. (c) "for all x in the domain of f" (rather than "for all real values of x") is used in the next sentence. Tag: Reverted
- Open set 02:30 −1 2601:184:4980:88d0:5c54:2156:c5ff:b3da talk Fixed grammar Tags: Mobile edit Mobile web edit
- m Mathematical analysis 01:19 −110 ClueBot NG talk contribs Reverting possible vandalism by Mikasa jeager to version by Kalam mani. Report False Positive? Thanks, ClueBot NG. (3947584) (Bot) Tag: Rollback
- m Mathematical analysis 01:19 +110 Mikasa jeager talk contribs →Sequences and limits Tag: Reverted

#### 14 April 2021

- Function (mathematics) 16:51 +6 David Eppstein talk contribs Undid revision 1017792381 by Laiwoonsiu (talk) overly WP:TECHNICAL pedantry, bizarre explanation Tag: Undo
- Function (mathematics) 16:38 −6 Laiwoonsiu talk contribs →Notation: Replaced 'valid for all real values of x' by 'valid for all values of x in R'. The word 'real' is only applicable when the domain of f is the set of real numbers. Also, the word 'valid" is superfluous. Tag: Reverted
- m Domain of a function 02:15 +8 Dokidaki-ylc talk contribs Emphasize that it is the total function whose domain coincides with its domain of definition Tag: Visual edit
- Module:Citation/CS1/Configuration 01:28 −190 Izno talk contribs extra text true, remove Roman numeral patterns until there is consensus
- Module:Citation/CS1 01:13 +98 Trappist the monk talk contribs hyphen_to_dash() fix;