List questions from combinatorial-number-theory

Published on 23 Jan 2018 - 11:29

249

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$\sum_{i=1}^n P(n,i)$

Published on 16 Mar 2018 - 12:06

124

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Combinatorial counting problem for induced subgraphs

Published on 09 Apr 2018 - 12:13

157

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Is this a proof for the rational distance problem of a unit square?

Published on 01 May 2018 - 13:25

353

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Number of triples of divisors who are relatively prime as a triple

Published on 12 Jul 2018 - 0:39

46

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What composite number can be represented as $\binom{n}{k}$ for $k\neq1$ or $n-1$

Published on 20 Jul 2018 - 1:04

145

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Generating function for number of partitions with Rank and Crank

Published on 05 Sep 2018 - 8:09

45

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If $A\subset\mathbb N$ does not contain any two integers such that one divides the other, must $A$ have density $0$?

Published on 25 Sep 2018 - 5:51

145

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The number of $f \circ f=f $

Published on 18 Feb 2019 - 14:52

118

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Is the problem Find all $x,y \in \mathbf{N}$ such that $\binom{x}{2} = \binom{y}{5}$ solved?

Published on 02 Apr 2019 - 1:02

60

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Prove that for every $n\geq6$ the equation $1/a_1^2 + ... 1/a_n^2 = 1$ has answer in $\mathbb{Z}$

Published on 08 May 2019 - 16:45

104

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How many copied numbers?

Published on 07 Jul 2019 - 23:30

355

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A fraction $p/q<1$ such that $p+q=333$.

Published on 03 Aug 2019 - 3:39

93

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Who has the winning strategy for the game?

Published on 05 Aug 2019 - 6:48

102

Views

Ann and Ben plays the following game

Published on 08 Aug 2019 - 3:37

List Question

$A+A\subseteq A\times A$

$\sum_{i=1}^n P(n,i)$

Combinatorial counting problem for induced subgraphs

Is this a proof for the rational distance problem of a unit square?

Number of triples of divisors who are relatively prime as a triple

What composite number can be represented as $\binom{n}{k}$ for $k\neq1$ or $n-1$

Generating function for number of partitions with Rank and Crank

If $A\subset\mathbb N$ does not contain any two integers such that one divides the other, must $A$ have density $0$?

The number of $f \circ f=f $

Is the problem Find all $x,y \in \mathbf{N}$ such that $\binom{x}{2} = \binom{y}{5}$ solved?

Prove that for every $n\geq6$ the equation $1/a_1^2 + ... 1/a_n^2 = 1$ has answer in $\mathbb{Z}$

How many copied numbers?

A fraction $p/q<1$ such that $p+q=333$.

Who has the winning strategy for the game?

Ann and Ben plays the following game

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