Question

Defining Addition of Natural Numbers as the Algebra of 'Push-Along' Functions

score 119 · Answer 1 · 2018-12-17 15:36:15

119

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Defining Addition of Natural Numbers as the Algebra of 'Push-Along' Functions

Published on 17 Dec 2018 - 15:36

score 1.4k · Answer 2 · 2026-03-25 06:06:35

1.4k

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Is there a connection between $\zeta(-1)$ and Ramanujan's calculation of the sum over $\mathbb{N}$?

Published on 25 Mar 2026 - 6:06

score 54 · Answer 3 · 2018-12-20 04:55:45

54

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What is a minimal set of rules that determine the usual order on $\Bbb{N}$ given that $1 \lt p_1 \lt p_2 \lt \dots$?

Published on 20 Dec 2018 - 4:55

score 141 · Answer 4 · 2026-03-25 12:49:43

141

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Build a wall with three types of bricks. What is the max length of wall less than 1000 cm you won't be able to lay?

Published on 25 Mar 2026 - 12:49

score 844 · Answer 5 · 2018-12-23 00:40:16

844

Views

proving that f:N^2->N is bijective

Published on 23 Dec 2018 - 0:40

score 110 · Answer 6 · 2018-12-26 17:52:44

110

Views

$\omega^\omega$ correspondence with $\mathbb R$

Published on 26 Dec 2018 - 17:52

score 414 · Answer 7 · 2018-12-29 12:43:43

414

Views

How to solve this Diophantine equation?

Published on 29 Dec 2018 - 12:43

score 844 · Answer 8 · 2018-12-29 14:11:04

844

Views

Bijection between $\{0,1\}^*$ and the natural numbers.

Published on 29 Dec 2018 - 14:11

score 85 · Answer 9 · 2018-12-29 22:39:14

85

Views

Prove that $a_n \in [0,2)$

Published on 29 Dec 2018 - 22:39

score 22 · Answer 10 · 2018-12-30 09:52:44

22

Views

Conditions for solutions to $p^a = q^b$

Published on 30 Dec 2018 - 9:52

score 272 · Answer 11 · 2026-03-25 09:25:46

272

Views

Does there exist a higher-dimensional 5-sided "tetrahedron + 1"?

Published on 25 Mar 2026 - 9:25

score 41 · Answer 12 · 2019-01-01 12:38:19

How to solve for the sides of a rectangle whose sides are natural numbers given its area is a known natural number?

score 140 · Answer 13 · 2019-01-03 16:31:40

140

Views

$\omega^\omega$ correspondence with $\mathbb R$-irrationality

Published on 03 Jan 2019 - 16:31

score 327 · Answer 14 · 2019-01-03 18:25:13

327

Views

Define a model for $\mathbb N$ without set theory

Published on 03 Jan 2019 - 18:25

score 830 · Answer 15 · 2019-01-06 08:47:51

830

Views

How many $10-$digit numbers are divided by $11.111$ and all the digits are different?

Published on 06 Jan 2019 - 8:47

List Question

Defining Addition of Natural Numbers as the Algebra of 'Push-Along' Functions

Is there a connection between $\zeta(-1)$ and Ramanujan's calculation of the sum over $\mathbb{N}$?

What is a minimal set of rules that determine the usual order on $\Bbb{N}$ given that $1 \lt p_1 \lt p_2 \lt \dots$?

Build a wall with three types of bricks. What is the max length of wall less than 1000 cm you won't be able to lay?

proving that f:N^2->N is bijective

$\omega^\omega$ correspondence with $\mathbb R$

How to solve this Diophantine equation?

Bijection between $\{0,1\}^*$ and the natural numbers.

Prove that $a_n \in [0,2)$

Conditions for solutions to $p^a = q^b$

Does there exist a higher-dimensional 5-sided "tetrahedron + 1"?

How to solve for the sides of a rectangle whose sides are natural numbers given its area is a known natural number?

$\omega^\omega$ correspondence with $\mathbb R$-irrationality

Define a model for $\mathbb N$ without set theory

How many $10-$digit numbers are divided by $11.111$ and all the digits are different?

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