Question

Proof: Busy Beaver function is not calculable

score 94 · Answer 1 · 2026-04-11 11:42:43

94

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Proof: Busy Beaver function is not calculable

Published on 11 Apr 2026 - 11:42

score 64 · Answer 2 · 2026-04-14 23:03:26

64

Views

Determine the flux of $u=(xz,yz,z^3)$ out of unit sphere $x^2+y^2+z^2=1$ (Verification)

Published on 14 Apr 2026 - 23:03

score 98 · Answer 3 · 2026-04-17 13:42:01

98

Views

Prove $\mathcal T∘\mathcal R=\mathcal T∘\mathcal S$ for any $\mathcal T$ iff $\mathcal R∘\mathcal T=\mathcal S∘\mathcal T$ for any $\mathcal T$.

Published on 17 Apr 2026 - 13:42

score 66 · Answer 4 · 2026-05-16 09:36:57

66

Views

Pigeon-Hole Principle Problem: Several Visitors to a Mathematics Library

Published on 16 May 2026 - 9:36

score 56 · Answer 5 · 2026-04-09 09:24:55

56

Views

Proof Verification of Question Regarding Compact Metric Spaces

Published on 09 Apr 2026 - 9:24

score 21 · Answer 6 · 2026-04-16 05:18:26

21

Views

Solution verification for the evaluation of $\sup_{(n,m)\in(\mathbb{N}\setminus\{0\})^2}\frac{(n+m)^2}{2^{nm}}$

Published on 16 Apr 2026 - 5:18

score 112 · Answer 7 · 2026-04-17 04:59:31

112

Views

How many 7 permutations of $\{1,\ldots,9\}$ are there such that $5$ and $6$ do not appear consecutively

Published on 17 Apr 2026 - 4:59

score 88 · Answer 8 · 2026-04-13 09:49:51

88

Views

Can you provide feedback on my approach to proving that $\mathbb{N}×\mathbb{N}$ is denumerable?

Published on 13 Apr 2026 - 9:49

score 24 · Answer 9 · 2026-04-10 16:47:22

24

Views

Conditional probability question regarding health statistics

Published on 10 Apr 2026 - 16:47

score 86 · Answer 10 · 2026-04-14 18:11:36

86

Views

For $T\in L(V,W)$, prove that there are bases such that $M(T)$ is 1 on the first dim range $T$ elements of the diagonal and zero everywhere else.

Published on 14 Apr 2026 - 18:11

score 883 · Answer 11 · 2026-05-16 17:58:30

883

Views

Is there a mistake in a GRE preparation book?

Published on 16 May 2026 - 17:58

score 115 · Answer 12 · 2026-04-14 06:49:54

115

Views

What is the probability of seeing $7$ heads in the toss of $12$ coins?

Published on 14 Apr 2026 - 6:49

score 88 · Answer 13 · 2026-04-29 21:17:44

88

Views

Probability that player B wins

Published on 29 Apr 2026 - 21:17

score 23 · Answer 14 · 2026-04-16 07:33:26

23

Views

Prove that a sequence defined by the supremem of another bounded sequence converges

Published on 16 Apr 2026 - 7:33

score 55 · Answer 15 · 2026-04-12 23:36:23

55

Views

Proof of boundedness of convergent sequences

Published on 12 Apr 2026 - 23:36

List Question

Proof: Busy Beaver function is not calculable

Determine the flux of $u=(xz,yz,z^3)$ out of unit sphere $x^2+y^2+z^2=1$ (Verification)

Prove $\mathcal T∘\mathcal R=\mathcal T∘\mathcal S$ for any $\mathcal T$ iff $\mathcal R∘\mathcal T=\mathcal S∘\mathcal T$ for any $\mathcal T$.

Pigeon-Hole Principle Problem: Several Visitors to a Mathematics Library

Proof Verification of Question Regarding Compact Metric Spaces

Solution verification for the evaluation of $\sup_{(n,m)\in(\mathbb{N}\setminus\{0\})^2}\frac{(n+m)^2}{2^{nm}}$

How many 7 permutations of $\{1,\ldots,9\}$ are there such that $5$ and $6$ do not appear consecutively

Can you provide feedback on my approach to proving that $\mathbb{N}×\mathbb{N}$ is denumerable?

Conditional probability question regarding health statistics

For $T\in L(V,W)$, prove that there are bases such that $M(T)$ is 1 on the first dim range $T$ elements of the diagonal and zero everywhere else.

Is there a mistake in a GRE preparation book?

What is the probability of seeing $7$ heads in the toss of $12$ coins?

Probability that player B wins

Prove that a sequence defined by the supremem of another bounded sequence converges

Proof of boundedness of convergent sequences

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