Question

How to finish this proof using Cauchy-Schwarz inequality?

score 46 · Answer 1 · 2026-03-29 05:35:18

46

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How to finish this proof using Cauchy-Schwarz inequality?

Published on 29 Mar 2026 - 5:35

score 1k · Answer 2 · 2026-03-04 08:39:14

1k

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Proof that the identity permutation is an even permutation by induction

Published on 04 Mar 2026 - 8:39

score 119 · Answer 3 · 2019-10-16 22:24:02

119

Views

Proof that everyone will know his secret.

Published on 16 Oct 2019 - 22:24

score 74 · Answer 4 · 2019-10-16 23:33:26

74

Views

$\forall n \in \mathbb{N}, 2 \leq n, \exists k \in \mathbb{N}$ such that $ 2^{k-1} \leq n \leq 2^{k}$

Published on 16 Oct 2019 - 23:33

score 52 · Answer 5 · 2026-04-06 09:38:09

52

Views

Prove a closed-form recurrence satisfies the original recurrence relation

Published on 06 Apr 2026 - 9:38

score 80 · Answer 6 · 2019-10-17 07:32:46

80

Views

Highschool induction (getting stuck on part 2)

Published on 17 Oct 2019 - 7:32

score 139 · Answer 7 · 2026-03-30 11:58:46

139

Views

$\frac{1}{\sqrt1}+\frac{1}{\sqrt2}+\dots+\frac{1}{\sqrt{n}}<2\sqrt{n}$?

Published on 30 Mar 2026 - 11:58

score 988 · Answer 8 · 2026-03-28 18:14:09

988

Views

Use proof by mathematical induction to prove explicit formula for recursive sequence is correct

Published on 28 Mar 2026 - 18:14

score 59 · Answer 9 · 2019-10-20 08:43:00

59

Views

General formula for this sum $\sum_{i=3}^n \frac{1}{(i-2) i (i+2)} = ?$

Published on 20 Oct 2019 - 8:43

score 30 · Answer 10 · 2019-10-20 19:33:39

30

Views

Use the "first form" of Principle of Math Induction to prove the Well Ordering Principle.

Published on 20 Oct 2019 - 19:33

score 98 · Answer 11 · 2026-03-25 19:25:06

98

Views

Strange algebra question - with permutations.

Published on 25 Mar 2026 - 19:25

score 142 · Answer 12 · 2019-10-20 20:57:09

142

Views

Prove or disprove there is such a strategy

Published on 20 Oct 2019 - 20:57

score 285 · Answer 13 · 2019-10-21 00:59:26

285

Views

Damaged lights proof

Published on 21 Oct 2019 - 0:59

score 42 · Answer 14 · 2026-03-26 01:07:26

42

Views

Prove that $R(p,q;r)$ exist using multidimensional induction

Published on 26 Mar 2026 - 1:07

score 961 · Answer 15 · 2019-10-21 13:59:10

961

Views

$|\sin(nx)| ≤ n|\sin x|$ Proof by induction

Published on 21 Oct 2019 - 13:59

List Question

How to finish this proof using Cauchy-Schwarz inequality?

Proof that the identity permutation is an even permutation by induction

Proof that everyone will know his secret.

$\forall n \in \mathbb{N}, 2 \leq n, \exists k \in \mathbb{N}$ such that $ 2^{k-1} \leq n \leq 2^{k}$

Prove a closed-form recurrence satisfies the original recurrence relation

Highschool induction (getting stuck on part 2)

$\frac{1}{\sqrt1}+\frac{1}{\sqrt2}+\dots+\frac{1}{\sqrt{n}}<2\sqrt{n}$?

Use proof by mathematical induction to prove explicit formula for recursive sequence is correct

General formula for this sum $\sum_{i=3}^n \frac{1}{(i-2) i (i+2)} = ?$

Use the "first form" of Principle of Math Induction to prove the Well Ordering Principle.

Strange algebra question - with permutations.

Prove or disprove there is such a strategy

Damaged lights proof

Prove that $R(p,q;r)$ exist using multidimensional induction

$|\sin(nx)| ≤ n|\sin x|$ Proof by induction

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