List questions from combinatorial-designs

Published on 27 Feb 2017 - 17:03

589

Views

On non-isomorphic and isomorphic Steiner Triple System!

Published on 04 Mar 2017 - 10:48

79

Views

Groups of a specific order from a difference set.

Published on 25 Mar 2026 - 4:37

616

Views

Designing a Hadamard matrix design of order 12 using Algebra methods

Published on 24 Mar 2017 - 11:10

505

Views

What is the operation of quasigroup in this example?

Published on 25 Mar 2026 - 12:25

115

Views

Partitions with pairwise small intersection

Published on 16 Feb 2023 - 17:31

116

Views

Set of integers with unique differences

Published on 25 Mar 2026 - 4:36

39

Views

Is there an (11,3,3)-BIBD with specific conditions?

Published on 21 Feb 2023 - 22:10

69

Views

Some questions about resolvable group divisible designs

Published on 28 Feb 2023 - 15:27

44

Views

Why can't these $STS(9)$'s have 8 blocks in common?

Published on 11 Mar 2023 - 0:44

76

Views

Table Tennis Player Grouping Problem

Published on 18 Mar 2023 - 9:55

328

Views

Let $S_1, S_2, \dots , S_m$ be distinct subsets of $\{1, 2, \dots , n\}$ such that $|S_i \cap S_j | = 1$ for all $i \ne j$. Prove that $m \le n$.

Published on 26 Mar 2023 - 18:22

84

Views

A family of subsets each of size $r$ must witness decent size of intersection for some two members.

Published on 25 Apr 2023 - 12:17

77

Views

Existence of a Hadamard-like matrix

Published on 30 Apr 2023 - 12:03

146

Views

Minimizing the diagonal product of a special orthogonal matrix

Published on 04 May 2023 - 7:36

List Question

Does the projective closure of an affine plane of order $n$ also have order $n$?

On non-isomorphic and isomorphic Steiner Triple System!

Groups of a specific order from a difference set.

Designing a Hadamard matrix design of order 12 using Algebra methods

What is the operation of quasigroup in this example?

Partitions with pairwise small intersection

Set of integers with unique differences

Is there an (11,3,3)-BIBD with specific conditions?

Some questions about resolvable group divisible designs

Why can't these $STS(9)$'s have 8 blocks in common?

Table Tennis Player Grouping Problem

Let $S_1, S_2, \dots , S_m$ be distinct subsets of $\{1, 2, \dots , n\}$ such that $|S_i \cap S_j | = 1$ for all $i \ne j$. Prove that $m \le n$.

A family of subsets each of size $r$ must witness decent size of intersection for some two members.

Existence of a Hadamard-like matrix

Minimizing the diagonal product of a special orthogonal matrix

Trending Questions

Popular # Hahtags

Popular Questions