List questions from natural-numbers

Published on 05 Apr 2020 - 17:56

49

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Coprimality in a given set of consecutive natural numbers

Published on 06 Apr 2020 - 3:17

692

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What's the next base-ten non-pandigital factorial number after 41!?

Published on 07 Apr 2020 - 4:04

101

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Does $\{1\} \times B$ measurable w.r.t. product measure imply $B$ is measurable?

Published on 08 Apr 2020 - 22:22

168

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Proving Proposition 4.1.8. from Terence Tao's Analysis I

Published on 11 Apr 2020 - 21:57

25

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Prove that $ \text{Inc}(n,m) = \text{Inc}(m-1, m) \circ \text{Inc}(n, m-1)$

Published on 12 Apr 2020 - 1:16

139

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An alternative proof of set of all permutations on naturals is uncountable by Cantor's diagonalization.

Published on 12 Apr 2020 - 6:16

466

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Proof for formula for number of divisors

Published on 12 Apr 2020 - 12:53

62

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Prove the following inequality regarding natural numbers

Published on 12 Apr 2020 - 17:39

56

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Prove trichotomy of order WITHOUT induction?

Published on 26 Mar 2026 - 19:09

111

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Prime number $x$ and $x!$

Published on 13 Apr 2020 - 12:07

58

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Proving Natural Predecessor existence using Well Order

Published on 26 Mar 2026 - 10:57

558

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Proof of the well-ordering principle

Published on 26 Mar 2026 - 10:59

293

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Why are natural numbers defined with union in Zermelo–Fraenkel (ZF) set theory?

Published on 22 Apr 2020 - 9:44

241

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Set theory: $n$ is a set in the naturals, if $x$ is in $n$, is $x$ also a natural number?

Published on 26 Apr 2020 - 19:58

List Question

Show that there do not exist any distinct natural numbers a,b,c,d such that

Coprimality in a given set of consecutive natural numbers

What's the next base-ten non-pandigital factorial number after 41!?

Does $\{1\} \times B$ measurable w.r.t. product measure imply $B$ is measurable?

Proving Proposition 4.1.8. from Terence Tao's Analysis I

Prove that $ \text{Inc}(n,m) = \text{Inc}(m-1, m) \circ \text{Inc}(n, m-1)$

An alternative proof of set of all permutations on naturals is uncountable by Cantor's diagonalization.

Proof for formula for number of divisors

Prove the following inequality regarding natural numbers

Prove trichotomy of order WITHOUT induction?

Prime number $x$ and $x!$

Proving Natural Predecessor existence using Well Order

Proof of the well-ordering principle

Why are natural numbers defined with union in Zermelo–Fraenkel (ZF) set theory?

Set theory: $n$ is a set in the naturals, if $x$ is in $n$, is $x$ also a natural number?

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