Question

Evaluating the function $S(a) = \sum_{n=0}^{\infty} a^n \binom{2n}{n}.$

score 103 · Answer 1 · 2026-04-12 02:48:18

103

Views

Evaluating the function $S(a) = \sum_{n=0}^{\infty} a^n \binom{2n}{n}.$

Published on 12 Apr 2026 - 2:48

score 168 · Answer 2 · 2026-04-12 21:03:28

168

Views

Ball distribution in urns

Published on 12 Apr 2026 - 21:03

score 157 · Answer 3 · 2026-04-12 10:20:08

157

Views

How to justify Katona's observation in the proof of Erdős-Ko-Rado's theorem.

Published on 12 Apr 2026 - 10:20

score 356 · Answer 4 · 2026-04-11 21:19:30

356

Views

Dissecting the complexity of prime numbers

Published on 11 Apr 2026 - 21:19

score 43 · Answer 5 · 2026-05-03 13:08:31

43

Views

Clarification regarding Dilworth Theorem Proof

Published on 03 May 2026 - 13:08

score 147 · Answer 6 · 2026-04-26 03:11:21

147

Views

k-ary bracelets with conserved/fixed indexes

Published on 26 Apr 2026 - 3:11

score 72 · Answer 7 · 2026-03-25 06:24:56

72

Views

Number of $n\times n$ matrices with fixed columns sums and only one non-zero elements among each row

Published on 25 Mar 2026 - 6:24

score 54 · Answer 8 · 2026-04-15 13:11:41

54

Views

A dice is thrown six times, Find the probablity of getting the six numbers in any order.

Published on 15 Apr 2026 - 13:11

score 1.3k · Answer 9 · 2026-04-09 11:14:08

1.3k

Views

Probability of creating a single loop

Published on 09 Apr 2026 - 11:14

score 1.2k · Answer 10 · 2026-04-12 09:15:32

1.2k

Views

Secret Santa algorithm that does not rely on a trusted 3rd party?

Published on 12 Apr 2026 - 9:15

score 167 · Answer 11 · 2026-04-14 08:32:47

167

Views

How to figure out number of combinations given a sequence length and number of possible values per item

Published on 14 Apr 2026 - 8:32

score 2.5k · Answer 12 · 2026-04-14 23:37:34

2.5k

Views

There are n balls in a jar labeled with numbers 1,2,...,n. A total of k balls are drawn WITH REPLACEMENT.

Published on 14 Apr 2026 - 23:37

score 1.1k · Answer 13 · 2026-05-01 01:50:28

1.1k

Views

$10$ letters are placed in $10$ addressed envelopes. Find the number of ways such that at most three letters are not in correct envelopes

Published on 01 May 2026 - 1:50

score 1.6k · Answer 14 · 2026-04-16 13:10:07

1.6k

Views

Blocking directed paths on a DAG with a linear number of vertex defects.

Published on 16 Apr 2026 - 13:10

score 3.6k · Answer 15 · 2026-04-09 14:06:13

3.6k

Views

Breaking Chocolate Problem

Published on 09 Apr 2026 - 14:06

List Question

Evaluating the function $S(a) = \sum_{n=0}^{\infty} a^n \binom{2n}{n}.$

Ball distribution in urns

How to justify Katona's observation in the proof of Erdős-Ko-Rado's theorem.

Dissecting the complexity of prime numbers

Clarification regarding Dilworth Theorem Proof

k-ary bracelets with conserved/fixed indexes

Number of $n\times n$ matrices with fixed columns sums and only one non-zero elements among each row

A dice is thrown six times, Find the probablity of getting the six numbers in any order.

Probability of creating a single loop

Secret Santa algorithm that does not rely on a trusted 3rd party?

How to figure out number of combinations given a sequence length and number of possible values per item

There are n balls in a jar labeled with numbers 1,2,...,n. A total of k balls are drawn WITH REPLACEMENT.

$10$ letters are placed in $10$ addressed envelopes. Find the number of ways such that at most three letters are not in correct envelopes

Blocking directed paths on a DAG with a linear number of vertex defects.

Breaking Chocolate Problem

Trending Questions

Popular # Hahtags

Popular Questions