Question

A space is $T_3$ if every point has a closed neighborhood that is $T_3$ in the subspace topology

score 61 · Answer 1 · 2026-04-10 22:50:16

61

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A space is $T_3$ if every point has a closed neighborhood that is $T_3$ in the subspace topology

Published on 10 Apr 2026 - 22:50

score 117 · Answer 2 · 2026-04-12 03:39:22

117

Views

Solution of a simple integral equation

Published on 12 Apr 2026 - 3:39

score 45 · Answer 3 · 2026-04-16 10:01:12

45

Views

Brezis' exercise 6.16.4: give an expression for $(I-T)^{-1}$ in terms of $\left(I-T^n\right)^{-1}$ and the iterates of $T$

Published on 16 Apr 2026 - 10:01

score 68 · Answer 4 · 2026-04-16 11:32:28

68

Views

Does the equality $x^n-y^n =(x-y)\sum_{i=0}^{n-1} x^i y^{n-1-i}$ hods for a commutative ring?

Published on 16 Apr 2026 - 11:32

score 151 · Answer 5 · 2026-04-12 01:55:16

151

Views

When two perpendicular lines are rotated about each other (out of their common plane), what is the new angle between them?

Published on 12 Apr 2026 - 1:55

score 42 · Answer 6 · 2026-04-14 20:38:50

42

Views

Verify: The Jacobian of $f: \mathbb R^n \to \mathbb R$ at a minimum is the zero matrix

Published on 14 Apr 2026 - 20:38

score 64 · Answer 7 · 2026-04-13 16:07:02

64

Views

Characteristics Method PDE - Solution Verification

Published on 13 Apr 2026 - 16:07

score 37 · Answer 8 · 2026-04-16 12:14:04

37

Views

Brezis' exercise 6.17: determine $E V(M)$ and $\sigma(M)$

Published on 16 Apr 2026 - 12:14

score 33 · Answer 9 · 2026-05-15 17:07:17

33

Views

Brezis' exercise 6.18.1: does $S_r$ or $S_{\ell}$ belong to $\mathcal{K}(E)$?

Published on 15 May 2026 - 17:07

score 56 · Answer 10 · 2026-04-15 17:10:21

56

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Brezis' exercise 6.18.3: prove that $\sigma\left(S_r\right)=[-1,1]$

Published on 15 Apr 2026 - 17:10

score 49 · Answer 11 · 2026-04-16 20:39:41

49

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Brezis' exercise 6.18.5: prove that $\sigma(S_{\ell})=[-1,1]$

Published on 16 Apr 2026 - 20:39

score 17 · Answer 12 · 2026-05-07 05:08:42

$n$ vehicles are inspected. let $A_i$ denote the event "the i-th vehicle receives the inspection sticker." Describe the following events

score 38 · Answer 13 · 2026-04-11 09:27:29

38

Views

Relationship Between $\sigma$-Continuity and Probability Measures in Set Theory

Published on 11 Apr 2026 - 9:27

score 53 · Answer 14 · 2026-04-15 23:56:28

53

Views

Markov Chains Concatenation Prohibited?

Published on 15 Apr 2026 - 23:56

score 34 · Answer 15 · 2026-04-09 04:36:04

34

Views

Probability Measure and Algebraic Structure in Infinitely Repeated Coin Tosses

Published on 09 Apr 2026 - 4:36

List Question

A space is $T_3$ if every point has a closed neighborhood that is $T_3$ in the subspace topology

Solution of a simple integral equation

Brezis' exercise 6.16.4: give an expression for $(I-T)^{-1}$ in terms of $\left(I-T^n\right)^{-1}$ and the iterates of $T$

Does the equality $x^n-y^n =(x-y)\sum_{i=0}^{n-1} x^i y^{n-1-i}$ hods for a commutative ring?

When two perpendicular lines are rotated about each other (out of their common plane), what is the new angle between them?

Verify: The Jacobian of $f: \mathbb R^n \to \mathbb R$ at a minimum is the zero matrix

Characteristics Method PDE - Solution Verification

Brezis' exercise 6.17: determine $E V(M)$ and $\sigma(M)$

Brezis' exercise 6.18.1: does $S_r$ or $S_{\ell}$ belong to $\mathcal{K}(E)$?

Brezis' exercise 6.18.3: prove that $\sigma\left(S_r\right)=[-1,1]$

Brezis' exercise 6.18.5: prove that $\sigma(S_{\ell})=[-1,1]$

$n$ vehicles are inspected. let $A_i$ denote the event "the i-th vehicle receives the inspection sticker." Describe the following events

Relationship Between $\sigma$-Continuity and Probability Measures in Set Theory

Markov Chains Concatenation Prohibited?

Probability Measure and Algebraic Structure in Infinitely Repeated Coin Tosses

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