Question

Number of doubletons that can be produced from a set A

score 1.6k · Answer 1 · 2018-05-17 21:33:39

1.6k

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Number of doubletons that can be produced from a set A

Published on 17 May 2018 - 21:33

score 85 · Answer 2 · 2026-03-26 14:31:59

85

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How to prove that generating function of series ($1 ,\binom{m}{1},\binom{m+1}{2},\binom{m+2}{3},...$ ) equals $\frac{1}{(1-z)^m}$ .

Published on 26 Mar 2026 - 14:31

score 43 · Answer 3 · 2018-05-17 23:27:11

43

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Discrete Math - Sets question

Published on 17 May 2018 - 23:27

score 124 · Answer 4 · 2018-05-18 00:41:21

124

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Discrete mathematics- beginner set problems

Published on 18 May 2018 - 0:41

score 60 · Answer 5 · 2018-05-18 05:49:29

True or false? $(A\setminus B)\times(A\setminus B)=(A\times A)\setminus(B\times B)$ and $(A\cup B)\setminus(B\cap A)=(A\cap B)\setminus (A \cup B)$

score 884 · Answer 6 · 2026-04-05 20:48:59

884

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Equalize the three numbers

Published on 05 Apr 2026 - 20:48

score 31 · Answer 7 · 2018-05-18 14:16:11

31

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How can I give the elements of the following set?

Published on 18 May 2018 - 14:16

score 76 · Answer 8 · 2018-05-18 14:36:08

76

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Would like to get some feedback about a probability question

Published on 18 May 2018 - 14:36

score 176 · Answer 9 · 2026-03-25 13:54:15

176

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Realizer of a poset problem

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score 194 · Answer 10 · 2026-03-27 11:14:12

194

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Non-Planar graph maximum degree proof

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score 38 · Answer 11 · 2026-03-30 07:04:14

38

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Graph related problem.

Published on 30 Mar 2026 - 7:04

score 2.7k · Answer 12 · 2026-03-27 01:47:56

2.7k

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Prove by induction that $x^n-y^n$ is divisble by $x-y$ for $ n \ge 1 $

Published on 27 Mar 2026 - 1:47

score 28 · Answer 13 · 2018-05-19 16:31:03

28

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How many words arranged from an n-letters word have no correct position to the original one

Published on 19 May 2018 - 16:31

score 82 · Answer 14 · 2018-05-20 00:14:43

82

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How many copies of unique items, distributed evenly to $m$ people, are required such that any group of $r$ people has each type

Published on 20 May 2018 - 0:14

score 59 · Answer 15 · 2026-03-26 16:06:45

59

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Solution of a linear system of difference equations

Published on 26 Mar 2026 - 16:06

List Question

Number of doubletons that can be produced from a set A

How to prove that generating function of series ($1 ,\binom{m}{1},\binom{m+1}{2},\binom{m+2}{3},...$ ) equals $\frac{1}{(1-z)^m}$ .

Discrete Math - Sets question

Discrete mathematics- beginner set problems

True or false? $(A\setminus B)\times(A\setminus B)=(A\times A)\setminus(B\times B)$ and $(A\cup B)\setminus(B\cap A)=(A\cap B)\setminus (A \cup B)$

Equalize the three numbers

How can I give the elements of the following set?

Would like to get some feedback about a probability question

Realizer of a poset problem

Non-Planar graph maximum degree proof

Graph related problem.

Prove by induction that $x^n-y^n$ is divisble by $x-y$ for $ n \ge 1 $

How many words arranged from an n-letters word have no correct position to the original one

How many copies of unique items, distributed evenly to $m$ people, are required such that any group of $r$ people has each type

Solution of a linear system of difference equations

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