User Zurab Silagadze

132 votes

Proofs without words

answered Apr 19, 2014 at 14:12

32 votes

Accepted

Stability of the Solar System

answered Jul 8, 2015 at 6:40

29 votes

Convergence of $\sum(n^3\sin^2n)^{-1}$

answered Jan 29, 2014 at 10:31

25 votes

History of $\frac d{dt}\tan^{-1}(t)=\frac 1{1+t^2}$

answered Feb 9, 2015 at 6:36

24 votes

Origin of exact sequences

answered Mar 13, 2014 at 11:01

22 votes

Which integers can be expressed as a sum of three cubes in infinitely many ways?

answered Aug 8, 2013 at 9:46

22 votes

Accepted

Is there a standard notation for off-diagonal transpose?

answered Jan 28, 2015 at 5:42

20 votes

Which popular games have been studied mathematically?

answered Jan 10, 2018 at 7:00

19 votes

Accepted

Ordinary Generating Function for Bell Numbers

answered Jun 30, 2014 at 7:21

19 votes

How does one justify funding for mathematics research?

answered Jul 11, 2014 at 14:39

18 votes

A certain mathematical competition in the UK

answered Jun 20, 2016 at 6:34

17 votes

Has Apéry's proof of the irrationality of $\zeta(3)$ ever been used to prove the irrationality of other constants?

answered Sep 27, 2018 at 9:40

16 votes

Accepted

Fermat's opponents

answered Aug 9, 2016 at 13:31

16 votes

Accepted

A sum by Ramanujan for $\coth^{2}(5\pi)$

answered Jul 9, 2014 at 8:56

15 votes

Absolute value inequality for complex numbers

answered May 21, 2014 at 10:30

15 votes

Evaluating an infinite sum related to $\sinh$

answered Mar 1, 2016 at 7:17

14 votes

How to make the Capelli's identity less mysterious?

answered Jan 30, 2015 at 14:55

14 votes

Accepted

Rings satisfying the polynomial equation $x^4=x^2$

answered Feb 2, 2015 at 14:10

14 votes

Accepted

On an example of an eventually oscillating function

answered Feb 28, 2015 at 16:47

14 votes

If a triangle can be displaced without distortion, must the surface have constant curvature?

answered Jun 18, 2018 at 3:07

13 votes

Algebra and cancer research

answered Apr 14, 2014 at 13:53

13 votes

Insightful books about elementary mathematics

answered Sep 21, 2013 at 2:11

12 votes

Accepted

Using the decomposition $641 = 5^4 + 2^4$ to factor $F_5$

answered Sep 11, 2013 at 3:40

12 votes

General Relativity and Differential Geometry intuitions of Second Bianchi Identity

answered May 11, 2016 at 8:33

12 votes

Usefulness of Nash embedding theorem

answered Oct 6, 2019 at 20:59

11 votes

Accepted

On the exact reference of a cute Diophantine problem

answered Nov 28, 2016 at 11:36

11 votes

Accepted

Primitive integral solutions to $x^2+y^3=z^2$

answered Mar 15, 2017 at 5:13

11 votes

Accepted

A closed form for an integral expressed as a finite series of $\zeta(2k+1)$, $\pi^m$ and a rational?

answered May 21, 2017 at 17:36

10 votes

volume over a hypercube, over simplex: twist by Euler numbers

answered May 2, 2017 at 5:09

10 votes

Publishing mathematical coincidences

answered Nov 5, 2017 at 14:00

Stack Exchange Network

210 Answers

Proofs without words

Stability of the Solar System

Convergence of $\sum(n^3\sin^2n)^{-1}$

History of $\frac d{dt}\tan^{-1}(t)=\frac 1{1+t^2}$

Origin of exact sequences

Which integers can be expressed as a sum of three cubes in infinitely many ways?

Is there a standard notation for off-diagonal transpose?

Which popular games have been studied mathematically?

Ordinary Generating Function for Bell Numbers

How does one justify funding for mathematics research?

A certain mathematical competition in the UK

Has Apéry's proof of the irrationality of $\zeta(3)$ ever been used to prove the irrationality of other constants?

Fermat's opponents

A sum by Ramanujan for $\coth^{2}(5\pi)$

Absolute value inequality for complex numbers

Evaluating an infinite sum related to $\sinh$

How to make the Capelli's identity less mysterious?

Rings satisfying the polynomial equation $x^4=x^2$

On an example of an eventually oscillating function

If a triangle can be displaced without distortion, must the surface have constant curvature?

Algebra and cancer research

Insightful books about elementary mathematics

Using the decomposition $641 = 5^4 + 2^4$ to factor $F_5$

General Relativity and Differential Geometry intuitions of Second Bianchi Identity

Usefulness of Nash embedding theorem

On the exact reference of a cute Diophantine problem

Primitive integral solutions to $x^2+y^3=z^2$

A closed form for an integral expressed as a finite series of $\zeta(2k+1)$, $\pi^m$ and a rational?

volume over a hypercube, over simplex: twist by Euler numbers

Publishing mathematical coincidences