User Zurab Silagadze

50 votes

2 answers

3k views

Rachinsky quintets

asked Jan 4, 2014 at 12:54

37 votes

5 answers

5k views

How did Ramanujan discover this identity?

asked Jan 13, 2015 at 14:51

25 votes

2 answers

2k views

Interesting integral

asked Feb 19, 2015 at 6:51

22 votes

3 answers

2k views

The origin of the Ramanujan's $\pi^4\approx 2143/22$ identity

asked Feb 26, 2016 at 8:20

21 votes

2 answers

3k views

New binomial coefficient identity?

asked Jan 30, 2018 at 11:13

21 votes

0 answers

658 views

A multiple integral

asked Jun 20, 2014 at 11:15

15 votes

0 answers

303 views

Surprising approximate identity

asked Sep 24, 2015 at 12:44

15 votes

1 answer

2k views

How did Fermi calculate this integral?

asked Mar 18, 2023 at 15:06

13 votes

0 answers

872 views

Geometric meaning of the black hole horizon

asked Sep 1, 2014 at 6:10

12 votes

0 answers

747 views

Cohomology and impossible ﬁgures

asked Feb 9, 2014 at 17:20

12 votes

0 answers

828 views

Multiple Integral (American Mathematical Monthly problem 11621 and its generalization)

asked Mar 22, 2013 at 6:05

12 votes

1 answer

657 views

English translation of Wilhelm Killing's 1889 paper

asked Oct 4, 2018 at 5:38

11 votes

1 answer

453 views

Calculation of the integral related to the gravitational shock wave

asked Feb 12, 2016 at 7:39

11 votes

3 answers

929 views

An integral related to the Euler gamma function

asked Feb 19, 2014 at 8:36

11 votes

1 answer

1k views

A curious property of Ramanujan's function $\tau(n)$

asked Oct 31, 2014 at 10:23

10 votes

1 answer

955 views

Ramanujan's problem 754 still open?

asked Feb 17, 2014 at 10:18

10 votes

2 answers

1k views

Kummer's quartic surface and the Dirac operator

asked Jan 17, 2014 at 12:17

10 votes

0 answers

345 views

Is this elliptic integral identity known?

asked Dec 11, 2020 at 8:11

9 votes

1 answer

382 views

Nonlinear oscillator with velocity-dependent frequency

asked Jan 21, 2019 at 12:13

9 votes

0 answers

793 views

Pi in collisions

asked Mar 14, 2017 at 6:30

8 votes

2 answers

948 views

Interesting triple integral

asked Mar 24, 2015 at 7:50

8 votes

2 answers

864 views

A recurrence relation for $\zeta(2n)$ - reference request

asked Jul 26, 2018 at 12:21

7 votes

1 answer

570 views

Basel problem and inversive geometry

asked Jul 16, 2018 at 11:17

7 votes

0 answers

498 views

The dogma of the natural numbers in physics

asked May 20, 2014 at 8:57

7 votes

2 answers

2k views

The source of the Integral

asked Dec 1, 2021 at 13:31

7 votes

1 answer

566 views

Infinite series for $1/\pi$. Is it known?

asked Mar 15, 2022 at 14:04

6 votes

2 answers

310 views

Conjectured congruence for the Apery numbers

asked May 30, 2014 at 6:18

6 votes

2 answers

245 views

Congruence equation for Apery numbers

asked May 30, 2014 at 10:05

6 votes

0 answers

156 views

Grunsky-Motzkin-Schoenberg formula

asked May 15, 2014 at 4:30

6 votes

2 answers

312 views

Collision polynomials

asked Jul 25, 2013 at 11:42

Stack Exchange Network

76 Questions

Rachinsky quintets

How did Ramanujan discover this identity?

Interesting integral

The origin of the Ramanujan's $\pi^4\approx 2143/22$ identity

New binomial coefficient identity?

A multiple integral

Surprising approximate identity

How did Fermi calculate this integral?

Geometric meaning of the black hole horizon

Cohomology and impossible ﬁgures

Multiple Integral (American Mathematical Monthly problem 11621 and its generalization)

English translation of Wilhelm Killing's 1889 paper

Calculation of the integral related to the gravitational shock wave

An integral related to the Euler gamma function

A curious property of Ramanujan's function $\tau(n)$

Ramanujan's problem 754 still open?

Kummer's quartic surface and the Dirac operator

Is this elliptic integral identity known?

Nonlinear oscillator with velocity-dependent frequency

Pi in collisions

Interesting triple integral

A recurrence relation for $\zeta(2n)$ - reference request

Basel problem and inversive geometry

The dogma of the natural numbers in physics

The source of the Integral

Infinite series for $1/\pi$. Is it known?

Conjectured congruence for the Apery numbers

Congruence equation for Apery numbers

Grunsky-Motzkin-Schoenberg formula

Collision polynomials