User contributions for Crisófilax

9 October 2024

• 14:5514:55, 9 October 2024 diff hist +12 m Surjective function No edit summary current Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

23 September 2024

• 09:3709:37, 23 September 2024 diff hist −4 m Transcendental equation No edit summary current Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

15 September 2024

• 10:1110:11, 15 September 2024 diff hist +2 m Landau's problems →Goldbach's conjecture

6 September 2024

• 19:2619:26, 6 September 2024 diff hist −23 List of trigonometric identities This is valid in general, not only for complex numbers in the unit circle.
• 19:2019:20, 6 September 2024 diff hist +13 m List of trigonometric identities →Finite products of trigonometric functions
• 18:3618:36, 6 September 2024 diff hist +237 Talk:Gompertz constant →Regularized sum: Reply current Tag: Reply
• 18:2418:24, 6 September 2024 diff hist −286 Gompertz constant The summation is meaningless since the gamma function is undefined on the negative integers. It could be the case that some regularization or limit lead to such sum, but without further clarification the statement its just nonsense.

7 June 2024

• 22:1922:19, 7 June 2024 diff hist −844 Rational root theorem →Proofs: The proof using Vieta's formulas is incorrect. It uses that if some we have rationals (p/q)(u/v) = a0/an then p|a0 and q|an, which is false. Take for example (3/4)(4/9)=1/3, but 3 does not divide 1 and 4 does not divide 9. For the proof to work we'll need to know that p/q is a factor of a0/an in the sense that p/q * k = a0/an for some INTEGER k, but that may be is not the case here.

25 May 2024

• 19:2619:26, 25 May 2024 diff hist −546 Lambert series The stated identities are false.

29 December 2023

• 13:5513:55, 29 December 2023 diff hist 0 m List of topologies The space was incorrectly listed as finite.

21 October 2023

• 10:3010:30, 21 October 2023 diff hist 0 m Coarse structure Fixing a typo Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

2 October 2023

• 18:4818:48, 2 October 2023 diff hist 0 m Surjective function The word space should be reserved for set with more structure.
• 18:3618:36, 2 October 2023 diff hist +4 Surjective function →Examples
• 18:3618:36, 2 October 2023 diff hist +13 m Surjective function The exponential IS surjective if defined with domain R and codomain (0,inf)

31 July 2023

• 20:4820:48, 31 July 2023 diff hist +1 m Set (mathematics) →History
• 14:3314:33, 31 July 2023 diff hist −18 Special functions Undid revision 1168058141 by Crisófilax (talk) Tag: Undo
• 14:3214:32, 31 July 2023 diff hist +18 m Special functions →Tables of special functions Tag: Reverted

15 July 2023

• 11:2411:24, 15 July 2023 diff hist +2 m Projectively extended real line It's not enough that the RHS is defined. For example, in a(b+c)=ab+ac with a=inf, b=1, c=-1, the RHS is defined and equal to inf, but the LHS is undefined. Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit
• 11:1411:14, 15 July 2023 diff hist −24 m Projectively extended real line Unnecessary since those operations are already defined in R Tags: Reverted Visual edit Mobile edit Mobile web edit Advanced mobile edit

14 July 2023

• 19:3719:37, 14 July 2023 diff hist −8 m Euler's continued fraction formula Remove the use of x since it's immediately used for the variable for the series which is valid for x near 0.

10 July 2023

• 20:2620:26, 10 July 2023 diff hist −9 m Euler's theorem →Proofs

8 July 2023

• 11:4811:48, 8 July 2023 diff hist +4 m Normal number There's no *a* Chaitin constant, there is a family of Chaitin constants. Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

28 May 2023

• 19:4019:40, 28 May 2023 diff hist +4 m Ulam number Fixing typo.

27 April 2023

• 00:4700:47, 27 April 2023 diff hist +6 m Dual curve →Equations

25 April 2023

• 23:5223:52, 25 April 2023 diff hist −1 m Root test →Root test explanation

18 August 2022

• 00:0500:05, 18 August 2022 diff hist −182 Fibonacci word fractal Removing \scriptstyle from math expressions to make it readable.

16 July 2022

• 20:0920:09, 16 July 2022 diff hist +29 m Coarse structure →Definition
• 17:5817:58, 16 July 2022 diff hist −2 m Hemicompact space →Applications

8 July 2022

• 02:0402:04, 8 July 2022 diff hist −26 m Variety (universal algebra) →Examples

6 July 2022

• 15:2415:24, 6 July 2022 diff hist 0 m Hugo Duminil-Copin Fixed typo Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

29 June 2022

• 22:1522:15, 29 June 2022 diff hist 0 Landau prime ideal theorem →General number fields

24 May 2022

• 18:5218:52, 24 May 2022 diff hist 0 m Group action →{{visible anchor|Orbit-stabilizer theorem}} and Burnside's lemma

4 March 2022

• 11:1711:17, 4 March 2022 diff hist −18 Primorial No edit summary Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

25 January 2022

• 12:0312:03, 25 January 2022 diff hist +13 Derivation (differential algebra) →Properties

11 December 2021

• 16:5916:59, 11 December 2021 diff hist +4 m Phasor →Addition

6 December 2021

• 01:4401:44, 6 December 2021 diff hist −2 m Weak derivative The weak derivative is not unique Tags: Visual edit Mobile edit Mobile web edit Advanced mobile edit

9 September 2021

• 02:5302:53, 9 September 2021 diff hist +12 m Inner measure →Measure completion

5 September 2021

• 19:1419:14, 5 September 2021 diff hist 0 m Pullback (category theory) Consistency

1 September 2021

• 16:4516:45, 1 September 2021 diff hist −39 m Niven's constant No edit summary
• 16:3016:30, 1 September 2021 diff hist +1 m Mathematical constant →Constants in advanced mathematics

18 August 2021

• 19:2019:20, 18 August 2021 diff hist +3 Dedekind psi function Using the standard notation for the Euler's totient function. It's usually denoted by $\varphi$ or $\phi$, but never with the uppercase $\Phi$.

16 August 2021

• 12:0312:03, 16 August 2021 diff hist −515 Stolz–Cesàro theorem Given $\lim_n f(n) = L$, calculating $\lim_n f(n)^{g(n)}$ as $\lim_n L^{g(n)}$ is incorrect.
• 11:5811:58, 16 August 2021 diff hist −357 Stolz–Cesàro theorem The substitution can be done since the limit is infinite.
• 11:5411:54, 16 August 2021 diff hist −1 Stolz–Cesàro theorem →Example 2

31 July 2021

• 03:5003:50, 31 July 2021 diff hist +545 User talk:David Eppstein →The term Diophantine equation doesn't necessarily refer to polynomial equations: new section Tags: Mobile edit Mobile web edit Advanced mobile edit

30 July 2021

• 19:0119:01, 30 July 2021 diff hist −10 m Diophantine equation No needs to be polynomial Tag: Reverted

13 July 2021

• 13:3113:31, 13 July 2021 diff hist +4 m St. Petersburg paradox →The St. Petersburg game

10 July 2021

• 11:0511:05, 10 July 2021 diff hist 0 m Lambert W function →Representations

9 July 2021

• 19:0419:04, 9 July 2021 diff hist +107 Lemniscate of Bernoulli Adding a rational parametrization.

4 June 2021

• 18:2718:27, 4 June 2021 diff hist 0 m Lehmer mean Consistency with the rest of the formulas