Question

Trying to figure out how to use "proof related notations" correctly

score 62 · Answer 1 · 2026-04-11 20:11:09

62

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Trying to figure out how to use "proof related notations" correctly

Published on 11 Apr 2026 - 20:11

score 64 · Answer 2 · 2026-04-13 07:13:39

64

Views

Proving a rooted tree has a height given $n \in N$, $n \geq 2$

Published on 13 Apr 2026 - 7:13

score 61 · Answer 3 · 2026-04-16 12:02:07

61

Views

Trying to prove $\forall m \in N$, $\exists j \in N$, ($m^2 = 3j-2$) $\vee$ ($m^2 = 3j$)

Published on 16 Apr 2026 - 12:02

score 84 · Answer 4 · 2026-04-13 14:44:33

84

Views

Prove inequality for a sum to $2^{n+1}$

Published on 13 Apr 2026 - 14:44

score 46 · Answer 5 · 2026-04-15 08:48:53

46

Views

Proving $\forall n \in N, \exists p \in N$, $p>n$ $\wedge$ $(prime(p) \wedge p \equiv 2\pmod3)$

Published on 15 Apr 2026 - 8:48

score 103 · Answer 6 · 2026-04-17 02:48:07

103

Views

proving $\forall n \in Z,$ : ($\exists a,b \in Z$ $n=4a+5b$) $\implies$ ($\exists a,b \in Z$ $n^2 = 5a+4b-1$)

Published on 17 Apr 2026 - 2:48

score 95 · Answer 7 · 2026-04-14 12:06:35

95

Views

prove by induction: $\forall n \in N, \exists k \in N: 165^{2n} - 1 = 166k$

Published on 14 Apr 2026 - 12:06

score 131 · Answer 8 · 2026-04-12 23:55:27

131

Views

$G\cong H$. $G$ is cyclic if and only if $H$ is cyclic.

Published on 12 Apr 2026 - 23:55

score 46 · Answer 9 · 2026-04-14 19:22:09

46

Views

Find the dimension of the subspace $V$ of $\mathbb{R} ^4$ that is generated by the vectors $(0,1,0,1),(1,0,1,0),(1,1,1,1)$.

Published on 14 Apr 2026 - 19:22

score 597 · Answer 10 · 2026-04-16 08:44:16

597

Views

Flats of the dual matroid and union of circuits of the matroid

Published on 16 Apr 2026 - 8:44

score 141 · Answer 11 · 2026-04-14 11:40:05

141

Views

On proving that a certain sequence is Cauchy in a Hilbert space.

Published on 14 Apr 2026 - 11:40

score 60 · Answer 12 · 2026-04-17 11:51:40

60

Views

Problem with formulating the negation of a statement

Published on 17 Apr 2026 - 11:51

score 285 · Answer 13 · 2026-04-14 06:46:29

285

Views

Quadrilaterals that has congruent opposite sides is parallelograms

Published on 14 Apr 2026 - 6:46

score 72 · Answer 14 · 2026-04-14 16:22:26

72

Views

Formal proof that if $a-b = \frac{a-b}{ab}$, $a-b$ has to be zero.

Published on 14 Apr 2026 - 16:22

score 605 · Answer 15 · 2026-04-13 18:57:59

605

Views

A challenging geometry proof?

Published on 13 Apr 2026 - 18:57

List Question

Trying to figure out how to use "proof related notations" correctly

Proving a rooted tree has a height given $n \in N$, $n \geq 2$

Trying to prove $\forall m \in N$, $\exists j \in N$, ($m^2 = 3j-2$) $\vee$ ($m^2 = 3j$)

Prove inequality for a sum to $2^{n+1}$

Proving $\forall n \in N, \exists p \in N$, $p>n$ $\wedge$ $(prime(p) \wedge p \equiv 2\pmod3)$

proving $\forall n \in Z,$ : ($\exists a,b \in Z$ $n=4a+5b$) $\implies$ ($\exists a,b \in Z$ $n^2 = 5a+4b-1$)

prove by induction: $\forall n \in N, \exists k \in N: 165^{2n} - 1 = 166k$

$G\cong H$. $G$ is cyclic if and only if $H$ is cyclic.

Find the dimension of the subspace $V$ of $\mathbb{R} ^4$ that is generated by the vectors $(0,1,0,1),(1,0,1,0),(1,1,1,1)$.

Flats of the dual matroid and union of circuits of the matroid

On proving that a certain sequence is Cauchy in a Hilbert space.

Problem with formulating the negation of a statement

Quadrilaterals that has congruent opposite sides is parallelograms

Formal proof that if $a-b = \frac{a-b}{ab}$, $a-b$ has to be zero.

A challenging geometry proof?

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