Question

Examine my proof: A bijection exists between any two finite nonempty sets that share the same number of elements

score 651 · Answer 1 · 2019-10-08 05:27:19

651

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Examine my proof: A bijection exists between any two finite nonempty sets that share the same number of elements

Published on 08 Oct 2019 - 5:27

score 406 · Answer 2 · 2026-04-02 05:21:13

406

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Proof by induction: $4^{3n} +8$ divisible by $9$

Published on 02 Apr 2026 - 5:21

score 74 · Answer 3 · 2019-10-08 12:03:30

74

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Proof by induction: Sum of binomials

Published on 08 Oct 2019 - 12:03

score 171 · Answer 4 · 2019-10-08 18:19:48

Demonstrate by mathematical induction that the sum of the internal angles of a $n$-sided *concave* polygon is $180^\circ(n-2)$.

score 65 · Answer 5 · 2019-10-08 20:39:23

65

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A rhombus is constructed out of natural numbers with the length of the side being 1,2,3,... in a way specified below.

Published on 08 Oct 2019 - 20:39

score 384 · Answer 6 · 2019-10-09 00:27:40

384

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finding flaw in the bogus inductive proof

Published on 09 Oct 2019 - 0:27

score 87 · Answer 7 · 2026-04-02 07:03:18

87

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Prove that : $2^{2^{n}}+1\mid 2^{x_{n}}-2$ with $n=1,2,3...$

Published on 02 Apr 2026 - 7:03

score 126 · Answer 8 · 2026-03-27 01:04:20

126

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Prove this formula for the $\sin\left(\frac{x}{2^n}\right), x \in [0,\frac{\pi}{2}[, n \in \Bbb{N}$

Published on 27 Mar 2026 - 1:04

score 39 · Answer 9 · 2019-10-09 21:05:00

39

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General Question about Induction

Published on 09 Oct 2019 - 21:05

score 88 · Answer 10 · 2019-10-09 23:11:07

88

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Strong Induction Proof Help

Published on 09 Oct 2019 - 23:11

score 493 · Answer 11 · 2019-10-10 18:29:23

493

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How would you prove this question about tuples

Published on 10 Oct 2019 - 18:29

score 325 · Answer 12 · 2019-10-10 20:56:59

325

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How to construct a sequence inductively in set theory?

Published on 10 Oct 2019 - 20:56

score 74 · Answer 13 · 2026-03-26 06:23:13

74

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Sets well ordered under different operations Proving

Published on 26 Mar 2026 - 6:23

score 103 · Answer 14 · 2026-04-01 16:27:03

103

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Factorization in proof by induction

Published on 01 Apr 2026 - 16:27

score 186 · Answer 15 · 2026-03-27 16:26:21

186

Views

Prove that $n! \geq n^{\frac{n}{2}}$

Published on 27 Mar 2026 - 16:26

List Question

Examine my proof: A bijection exists between any two finite nonempty sets that share the same number of elements

Proof by induction: $4^{3n} +8$ divisible by $9$

Proof by induction: Sum of binomials

Demonstrate by mathematical induction that the sum of the internal angles of a $n$-sided concave polygon is $180^\circ(n-2)$.

A rhombus is constructed out of natural numbers with the length of the side being 1,2,3,... in a way specified below.

finding flaw in the bogus inductive proof

Prove that : $2^{2^{n}}+1\mid 2^{x_{n}}-2$ with $n=1,2,3...$

Prove this formula for the $\sin\left(\frac{x}{2^n}\right), x \in [0,\frac{\pi}{2}[, n \in \Bbb{N}$

General Question about Induction

Strong Induction Proof Help

How would you prove this question about tuples

How to construct a sequence inductively in set theory?

Sets well ordered under different operations Proving

Factorization in proof by induction

Prove that $n! \geq n^{\frac{n}{2}}$

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