Question

For a distributive lattice, show $x ~\hat{\land}~ a = y ~\hat{\land}~ a$ and $x ~\hat{\lor}~ a = y ~\hat{\lor}~ a$ imply $x = y$.

score 157 · Answer 1 · 2026-04-14 17:23:05

157

Views

For a distributive lattice, show $x ~\hat{\land}~ a = y ~\hat{\land}~ a$ and $x ~\hat{\lor}~ a = y ~\hat{\lor}~ a$ imply $x = y$.

Published on 14 Apr 2026 - 17:23

score 59 · Answer 2 · 2026-04-12 05:54:31

59

Views

Constructing a parallelepiped with all faces having equal diagonals, what goes wrong?

Published on 12 Apr 2026 - 5:54

score 47 · Answer 3 · 2026-04-12 07:37:22

47

Views

Dense Orbit in a Compact Topological Metrizable Group

Published on 12 Apr 2026 - 7:37

score 60 · Answer 4 · 2026-04-14 17:41:33

60

Views

Let $X_n$ be a simple random walk in $\Bbb Z^d$. For all $n,m,k\in\Bbb N,x,y\in\Bbb Z^d$ $\Bbb P(X_{n+k}=y\mid X_n=x)=\mathbb P(X_{m+k}=y \mid X_m=x)$

Published on 14 Apr 2026 - 17:41

score 91 · Answer 5 · 2026-04-15 22:37:27

91

Views

Triply transitive action on upper half plane

Published on 15 Apr 2026 - 22:37

score 162 · Answer 6 · 2026-04-16 12:29:18

162

Views

Where is my mistake in the evaluation of $\int\;\frac {1}{\sqrt {1-e^{2x}}}dx$?

Published on 16 Apr 2026 - 12:29

score 195 · Answer 7 · 2026-04-13 10:34:19

195

Views

Upper bound of the dot product of two real-valued vectors

Published on 13 Apr 2026 - 10:34

score 34 · Answer 8 · 2026-04-13 13:55:01

34

Views

Solution verification about a question involving direct sums and containment

Published on 13 Apr 2026 - 13:55

score 57 · Answer 9 · 2026-04-11 03:50:28

57

Views

Does $\lnot(A→B) ⊢ A→\lnot B$ in classical logic?

Published on 11 Apr 2026 - 3:50

score 69 · Answer 10 · 2026-04-14 07:04:56

69

Views

Density of the difference of Laplace random variable and uniform random variable

Published on 14 Apr 2026 - 7:04

score 86 · Answer 11 · 2026-04-14 07:55:50

86

Views

Prove that there can't exist a bijection $f: A\rightarrow I_{n}$, if $A\subset I_{n}, \ I_{n}=\{ 1,2,...,n \}$

Published on 14 Apr 2026 - 7:55

score 235 · Answer 12 · 2026-04-15 03:09:58

235

Views

Find the number of distinct integers in the collection of first $500$ terms of each of the arithemetic progressions $\{1,4,...\}$ and $\{9,14,...\}$

Published on 15 Apr 2026 - 3:09

score 759 · Answer 13 · 2026-04-11 08:54:50

759

Views

Central Limit Theorem without IID?

Published on 11 Apr 2026 - 8:54

score 112 · Answer 14 · 2026-04-12 10:36:10

112

Views

Exercise 6, Section 1.3 of Hungerford’s Abstract Algebra

Published on 12 Apr 2026 - 10:36

score 207 · Answer 15 · 2026-04-11 07:50:09

207

Views

New proof of Pythagorean identity

Published on 11 Apr 2026 - 7:50

List Question

For a distributive lattice, show $x ~\hat{\land}~ a = y ~\hat{\land}~ a$ and $x ~\hat{\lor}~ a = y ~\hat{\lor}~ a$ imply $x = y$.

Constructing a parallelepiped with all faces having equal diagonals, what goes wrong?

Dense Orbit in a Compact Topological Metrizable Group

Let $X_n$ be a simple random walk in $\Bbb Z^d$. For all $n,m,k\in\Bbb N,x,y\in\Bbb Z^d$ $\Bbb P(X_{n+k}=y\mid X_n=x)=\mathbb P(X_{m+k}=y \mid X_m=x)$

Triply transitive action on upper half plane

Where is my mistake in the evaluation of $\int\;\frac {1}{\sqrt {1-e^{2x}}}dx$?

Upper bound of the dot product of two real-valued vectors

Solution verification about a question involving direct sums and containment

Does $\lnot(A→B) ⊢ A→\lnot B$ in classical logic?

Density of the difference of Laplace random variable and uniform random variable

Prove that there can't exist a bijection $f: A\rightarrow I_{n}$, if $A\subset I_{n}, \ I_{n}=\{ 1,2,...,n \}$

Find the number of distinct integers in the collection of first $500$ terms of each of the arithemetic progressions $\{1,4,...\}$ and $\{9,14,...\}$

Central Limit Theorem without IID?

Exercise 6, Section 1.3 of Hungerford’s Abstract Algebra

New proof of Pythagorean identity

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