Question

How many distinct sets can be formed if each element can be present in at max r sets?

score 99 · Answer 1 · 2022-07-04 20:41:30

99

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How many distinct sets can be formed if each element can be present in at max r sets?

Published on 04 Jul 2022 - 20:41

score 262 · Answer 2 · 2022-07-08 20:11:07

262

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Order 3 projective plane with playing cards

Published on 08 Jul 2022 - 20:11

score 74 · Answer 3 · 2022-07-15 06:16:04

74

Views

Mathematical equation for pairing

Published on 15 Jul 2022 - 6:16

score 213 · Answer 4 · 2022-07-26 20:28:56

213

Views

Bounding Turán numbers $t_3(11,5)$ and $t_3(16,7)$

Published on 26 Jul 2022 - 20:28

score 87 · Answer 5 · 2022-08-08 22:26:40

87

Views

How many groups of people can we make with x number of overlaps?

Published on 08 Aug 2022 - 22:26

score 155 · Answer 6 · 2022-08-10 20:32:20

155

Views

Efficient way to rotate through partitions with subsets of size three

Published on 10 Aug 2022 - 20:32

score 70 · Answer 7 · 2022-08-24 03:46:14

70

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Combinatorial design using finite field

Published on 24 Aug 2022 - 3:46

score 69 · Answer 8 · 2022-08-24 21:01:41

69

Views

Generate groups for multiple match rounds while minimizing the number of times two participants are in the same match

Published on 24 Aug 2022 - 21:01

score 74 · Answer 9 · 2026-02-23 05:47:43

74

Views

Can there be more than $\log_2(n)$ mutually orthogonal $(\pm1)$-vectors $x$ in $\mathbb{R}^n$ such that $x_{2k-1} \neq x_{2k}$ for all $k$?

Published on 23 Feb 2026 - 5:47

score 49 · Answer 10 · 2026-03-20 03:54:09

49

Views

Can we characterize the “associate classes” of a unipotent quasi-commutative quasigroup as some combinatorial design?

Published on 20 Mar 2026 - 3:54

score 80 · Answer 11 · 2022-10-16 14:58:01

80

Views

Question dealing with partitions of a set with N elements into classes with 2 elements

Published on 16 Oct 2022 - 14:58

score 68 · Answer 12 · 2022-11-03 22:27:30

68

Views

Combinatorial decomposition of summands in product

Published on 03 Nov 2022 - 22:27

score 61 · Answer 13 · 2022-11-05 12:43:37

In a semi-regular polyhedron, why does a polygon with odd sides (e.g. a triangle) have to be surrounded by polygons of the same type (e.g. squares)?

score 66 · Answer 14 · 2026-03-25 13:54:06

66

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Are there parameters such that a combinatorial $(n_s,m_t)$ configuration does not exist?

Published on 25 Mar 2026 - 13:54

score 127 · Answer 15 · 2022-11-23 03:25:57

127

Views

Binary labelling

Published on 23 Nov 2022 - 3:25

List Question

How many distinct sets can be formed if each element can be present in at max r sets?

Order 3 projective plane with playing cards

Mathematical equation for pairing

Bounding Turán numbers $t_3(11,5)$ and $t_3(16,7)$

How many groups of people can we make with x number of overlaps?

Efficient way to rotate through partitions with subsets of size three

Combinatorial design using finite field

Generate groups for multiple match rounds while minimizing the number of times two participants are in the same match

Can there be more than $\log_2(n)$ mutually orthogonal $(\pm1)$-vectors $x$ in $\mathbb{R}^n$ such that $x_{2k-1} \neq x_{2k}$ for all $k$?

Can we characterize the “associate classes” of a unipotent quasi-commutative quasigroup as some combinatorial design?

Question dealing with partitions of a set with N elements into classes with 2 elements

Combinatorial decomposition of summands in product

In a semi-regular polyhedron, why does a polygon with odd sides (e.g. a triangle) have to be surrounded by polygons of the same type (e.g. squares)?

Are there parameters such that a combinatorial $(n_s,m_t)$ configuration does not exist?

Binary labelling

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