Question

A problem on the $n\times n$ square

score 250 · Answer 1 · 2026-03-25 12:55:47

250

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A problem on the $n\times n$ square

Published on 25 Mar 2026 - 12:55

score 123 · Answer 2 · 2020-03-11 16:09:36

123

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Edges on $K_{2,m}$ free graph

Published on 11 Mar 2020 - 16:09

score 54 · Answer 3 · 2020-03-15 20:53:01

54

Views

Size of a family of subsets of $[n]$, where any two subsets are non-disjointed, none contains the other, and the union of them is not $[n]$.

Published on 15 Mar 2020 - 20:53

score 66 · Answer 4 · 2026-03-25 10:59:43

66

Views

Finding large solution-free sets

Published on 25 Mar 2026 - 10:59

score 354 · Answer 5 · 2020-03-28 01:10:50

354

Views

Permutation: solutions to linear equation: Compute the number of all solutions $(x_1, x_2,\dots, x_n)$ of the equation $x_1+x_2+\dots+x_n=k$

Published on 28 Mar 2020 - 1:10

score 37 · Answer 6 · 2020-03-28 09:09:14

37

Views

Split n numbers into k lists with equal size, which any different combination of m lists contains all the n numbers

Published on 28 Mar 2020 - 9:09

score 174 · Answer 7 · 2026-03-25 12:46:21

174

Views

New Character in Chess game

Published on 25 Mar 2026 - 12:46

score 268 · Answer 8 · 2020-04-22 18:58:13

268

Views

How can I find the number of different triangles in $n$-vertex graph?

Published on 22 Apr 2020 - 18:58

score 328 · Answer 9 · 2026-03-25 16:03:01

328

Views

Let $G$ be an $n$-vertex graph with at most $100n$ triangles. Prove that $G$ has a triangle-free...

Published on 25 Mar 2026 - 16:03

score 177 · Answer 10 · 2020-04-30 17:18:47

177

Views

Assignment problem cost matrix reconstruction justification

Published on 30 Apr 2020 - 17:18

score 40 · Answer 11 · 2020-05-01 15:08:01

40

Views

Confusion on applying Szemeredi's lemma to graph building etc

Published on 01 May 2020 - 15:08

score 57 · Answer 12 · 2020-05-05 01:22:39

57

Views

Show ex$(n, H)\leq \left\lfloor\frac{n^2+n}{4}\right\rfloor$

Published on 05 May 2020 - 1:22

score 47 · Answer 13 · 2026-03-25 19:10:12

47

Views

In a random graph $G(n,p)$ with $\delta(G) \geq \delta$, how is the event $\{S \subset V \text{ is not a dominating set} \}$ characterized?

Published on 25 Mar 2026 - 19:10

score 395 · Answer 14 · 2020-05-18 13:21:35

395

Views

In how many different ways can we place $k$ elements in $n$ boxes in which each box has a fixed maximum capacity?

Published on 18 May 2020 - 13:21

score 245 · Answer 15 · 2020-05-20 10:19:07

245

Views

Maximal intersecting family of $X = \{1, \ldots, 7\}$

Published on 20 May 2020 - 10:19

List Question

A problem on the $n\times n$ square

Edges on $K_{2,m}$ free graph

Size of a family of subsets of $[n]$, where any two subsets are non-disjointed, none contains the other, and the union of them is not $[n]$.

Finding large solution-free sets

Permutation: solutions to linear equation: Compute the number of all solutions $(x_1, x_2,\dots, x_n)$ of the equation $x_1+x_2+\dots+x_n=k$

Split n numbers into k lists with equal size, which any different combination of m lists contains all the n numbers

New Character in Chess game

How can I find the number of different triangles in $n$-vertex graph?

Let $G$ be an $n$-vertex graph with at most $100n$ triangles. Prove that $G$ has a triangle-free...

Assignment problem cost matrix reconstruction justification

Confusion on applying Szemeredi's lemma to graph building etc

Show ex$(n, H)\leq \left\lfloor\frac{n^2+n}{4}\right\rfloor$

In a random graph $G(n,p)$ with $\delta(G) \geq \delta$, how is the event $\{S \subset V \text{ is not a dominating set} \}$ characterized?

In how many different ways can we place $k$ elements in $n$ boxes in which each box has a fixed maximum capacity?

Maximal intersecting family of $X = \{1, \ldots, 7\}$

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