Question

Maximum degree for this set of planar graphs where all neighbours of any point lie on a circle centered on that point

score 39 · Answer 1 · 2026-03-30 03:22:00

39

Views

Maximum degree for this set of planar graphs where all neighbours of any point lie on a circle centered on that point

Published on 30 Mar 2026 - 3:22

score 70 · Answer 2 · 2021-10-22 17:37:39

70

Views

Colinear and concurrency configuration in triangle involving arbitrary point

Published on 22 Oct 2021 - 17:37

score 30 · Answer 3 · 2026-03-29 08:35:23

30

Views

Prove conjecture about classification of circle pairings

Published on 29 Mar 2026 - 8:35

score 219 · Answer 4 · 2026-03-26 01:12:45

219

Views

New trigamma identity for $\Psi_1(\frac3{20})+6\,\Psi_1(\frac15)+10\,\Psi_1(\frac25)-\Psi_1(\frac1{20})$

Published on 26 Mar 2026 - 1:12

score 247 · Answer 5 · 2026-02-23 12:06:20

247

Views

Is $3$ the only prime that is both a Mersenne prime and a Fermat prime?

Published on 23 Feb 2026 - 12:06

score 285 · Answer 6 · 2026-03-29 22:34:38

285

Views

A conjecture about non-nilpotent groups

Published on 29 Mar 2026 - 22:34

score 158 · Answer 7 · 2021-11-02 14:23:16

158

Views

Irreducible polynomials in $\mathbb Z[X]$ with no primes in the image.

Published on 02 Nov 2021 - 14:23

score 238 · Answer 8 · 2021-11-08 22:46:06

238

Views

Does $\gcd$ of values of $n$-th degree primitive integer polynomial always divide $n!$?

Published on 08 Nov 2021 - 22:46

score 107 · Answer 9 · 2021-11-09 16:26:55

107

Views

Primes of the form $n^2+n+1$

Published on 09 Nov 2021 - 16:26

score 1k · Answer 10 · 2021-11-10 13:47:27

1k

Views

Can two circles intersect each other at right angles, such that one circle passes through the center of the other circle?

Published on 10 Nov 2021 - 13:47

score 129 · Answer 11 · 2026-03-29 03:35:49

129

Views

Conjectured closed form for ${\it {Li_2}} \left( 1-{\frac {\sqrt {2}}{2}}-i \left( 1-{\frac {\sqrt { 2}}{2}} \right) \right)$

Published on 29 Mar 2026 - 3:35

score 265 · Answer 12 · 2021-11-17 01:53:44

265

Views

Real number version of the complex conjugate theorem?

Published on 17 Nov 2021 - 1:53

score 128 · Answer 13 · 2026-03-30 20:41:00

128

Views

Generalizing the result $|a\times b|=|a||b||\sin \theta|$ to arbitrary dimensions.

Published on 30 Mar 2026 - 20:41

score 515 · Answer 14 · 2021-12-02 15:57:00

515

Views

All solutions to $1/a+1/b=1/c$?

Published on 02 Dec 2021 - 15:57

score 119 · Answer 15 · 2026-03-27 17:52:55

119

Views

On the inequality $I(q^k)+I(n^2) \leq \frac{3q^{2k} + 2q^k + 1}{q^k (q^k + 1)}$ where $q^k n^2$ is an odd perfect number

Published on 27 Mar 2026 - 17:52

List Question

Maximum degree for this set of planar graphs where all neighbours of any point lie on a circle centered on that point

Colinear and concurrency configuration in triangle involving arbitrary point

Prove conjecture about classification of circle pairings

New trigamma identity for $\Psi_1(\frac3{20})+6\,\Psi_1(\frac15)+10\,\Psi_1(\frac25)-\Psi_1(\frac1{20})$

Is $3$ the only prime that is both a Mersenne prime and a Fermat prime?

A conjecture about non-nilpotent groups

Irreducible polynomials in $\mathbb Z[X]$ with no primes in the image.

Does $\gcd$ of values of $n$-th degree primitive integer polynomial always divide $n!$?

Primes of the form $n^2+n+1$

Can two circles intersect each other at right angles, such that one circle passes through the center of the other circle?

Conjectured closed form for ${\it {Li_2}} \left( 1-{\frac {\sqrt {2}}{2}}-i \left( 1-{\frac {\sqrt { 2}}{2}} \right) \right)$

Real number version of the complex conjugate theorem?

Generalizing the result $|a\times b|=|a||b||\sin \theta|$ to arbitrary dimensions.

All solutions to $1/a+1/b=1/c$?

On the inequality $I(q^k)+I(n^2) \leq \frac{3q^{2k} + 2q^k + 1}{q^k (q^k + 1)}$ where $q^k n^2$ is an odd perfect number

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