Question

Coloring of board with periodic boundary conditions (Pólya enumeration)

score 152 · Answer 1 · 2026-04-09 07:32:20

152

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Coloring of board with periodic boundary conditions (Pólya enumeration)

Published on 09 Apr 2026 - 7:32

score 130 · Answer 2 · 2026-04-12 08:13:14

130

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Stumped on basic statistics question.

Published on 12 Apr 2026 - 8:13

score 420 · Answer 3 · 2026-04-09 07:19:43

420

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How to apply Principle of Inclusion and Exclusion in Combinatorics

Published on 09 Apr 2026 - 7:19

score 343 · Answer 4 · 2026-04-07 23:11:39

343

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How many non negative integers have the sum less than 10 where the order does not matter?

Published on 07 Apr 2026 - 23:11

score 543 · Answer 5 · 2026-04-11 21:15:04

543

Views

Permutations/ Combinations- Dividing a pile into 3 piles

Published on 11 Apr 2026 - 21:15

score 1k · Answer 6 · 2026-03-25 20:13:52

1k

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How many labeled trees are there if there're $4$ leaves that are set?

Published on 25 Mar 2026 - 20:13

score 1.8k · Answer 7 · 2026-04-12 18:40:56

1.8k

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Probability of landing on the nth stair.

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score 568 · Answer 8 · 2026-03-26 12:51:27

568

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Finding Tight bound for Binomial Coefficient inequality

Published on 26 Mar 2026 - 12:51

score 139 · Answer 9 · 2026-04-12 05:59:40

139

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Counting points on a two-dimensional grid

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score 138 · Answer 10 · 2026-04-11 23:47:42

138

Views

How to derive the explicit formula for 2-dimensional recurrence relation $ f(m,n)$?

Published on 11 Apr 2026 - 23:47

score 475 · Answer 11 · 2026-04-12 05:28:38

475

Views

Intuitive understanding of Pascal's Identity

Published on 12 Apr 2026 - 5:28

score 63 · Answer 12 · 2026-03-30 08:58:57

63

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If $G$ is not a forest, $g(G) \leq 2\cdot \operatorname{diam}(G) + 1$

Published on 30 Mar 2026 - 8:58

score 39 · Answer 13 · 2026-03-25 07:45:55

39

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Find a polynomial $p(x)$ such that $p(x)(2x+6x^2+\cdots + n(n+1)x^n + \cdots ) = \frac{2x(1+x)^2}{(1-x)}$

Published on 25 Mar 2026 - 7:45

score 85 · Answer 14 · 2026-03-25 10:56:57

85

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Prove that $p_2(n) = \left \lfloor{\frac{n}{2}}\right \rfloor+1$ using identity

Published on 25 Mar 2026 - 10:56

score 1.8k · Answer 15 · 2026-04-06 16:19:38

1.8k

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Basic combinatorics: In how many ways can we arrange $4$ different balls in $4$ identical boxes?

Published on 06 Apr 2026 - 16:19

List Question

Coloring of board with periodic boundary conditions (Pólya enumeration)

Stumped on basic statistics question.

How to apply Principle of Inclusion and Exclusion in Combinatorics

How many non negative integers have the sum less than 10 where the order does not matter?

Permutations/ Combinations- Dividing a pile into 3 piles

How many labeled trees are there if there're $4$ leaves that are set?

Probability of landing on the nth stair.

Finding Tight bound for Binomial Coefficient inequality

Counting points on a two-dimensional grid

How to derive the explicit formula for 2-dimensional recurrence relation $ f(m,n)$?

Intuitive understanding of Pascal's Identity

If $G$ is not a forest, $g(G) \leq 2\cdot \operatorname{diam}(G) + 1$

Find a polynomial $p(x)$ such that $p(x)(2x+6x^2+\cdots + n(n+1)x^n + \cdots ) = \frac{2x(1+x)^2}{(1-x)}$

Prove that $p_2(n) = \left \lfloor{\frac{n}{2}}\right \rfloor+1$ using identity

Basic combinatorics: In how many ways can we arrange $4$ different balls in $4$ identical boxes?

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