Question

Random walk and inequality involving the Green function on N step

score 49 · Answer 1 · 2026-04-12 10:45:00

49

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Random walk and inequality involving the Green function on N step

Published on 12 Apr 2026 - 10:45

score 63 · Answer 2 · 2026-04-11 13:23:23

63

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An attempt to prove Kadeishvili's theorem

Published on 11 Apr 2026 - 13:23

score 17 · Answer 3 · 2026-04-16 21:51:29

17

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Brezis' exercise 6.22.3: construct an example in $E=\mathbb{R}^2$ such that $Q(E V(T)) \neq E V(Q(T))$ and $Q(\sigma(T)) \neq \sigma(Q(T))$

Published on 16 Apr 2026 - 21:51

score 59 · Answer 4 · 2026-04-15 10:53:27

59

Views

Show that if a subset of a metric space is sequentially closed then it is closed

Published on 15 Apr 2026 - 10:53

score 89 · Answer 5 · 2026-03-26 06:30:52

89

Views

If $T$ is self-adjoint, then $T^2 + tI$ is bijective for any $t>0$

Published on 26 Mar 2026 - 6:30

score 75 · Answer 6 · 2026-04-15 05:47:01

75

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How many people must be in a room until it is at least a $50\%$ chance that two will have the same amount of change?

Published on 15 Apr 2026 - 5:47

score 49 · Answer 7 · 2026-04-15 07:29:11

49

Views

Brezis' exercise 6.22.4: prove that $Q(T)$ is bijective

Published on 15 Apr 2026 - 7:29

score 302 · Answer 8 · 2026-04-14 13:31:26

302

Views

Proof: Any CDF (Cumulative Distribution Function) has a uniform distribution

Published on 14 Apr 2026 - 13:31

score 126 · Answer 9 · 2026-04-14 07:05:24

126

Views

Combinatorial Proof of the identity $\sum_{k=1}^{n}k\binom{n}{k} = n2^{n-1}$.

Published on 14 Apr 2026 - 7:05

score 169 · Answer 10 · 2026-04-15 05:55:35

169

Views

Evaluating the integral $\oint \coth(\frac{1}{2}z) dz$ taken over the contour $C$ and $|z-\frac{\pi}{2}i|^{2} = 1$

Published on 15 Apr 2026 - 5:55

score 107 · Answer 11 · 2026-04-13 02:25:38

107

Views

Expected length of sequence of positive integers which sums to $2023$

Published on 13 Apr 2026 - 2:25

score 28 · Answer 12 · 2026-04-14 05:52:36

28

Views

Missing step in my proof for $\exists x! P(x)$

Published on 14 Apr 2026 - 5:52

score 79 · Answer 13 · 2026-04-13 00:34:27

79

Views

Verification of a Simple Proof...

Published on 13 Apr 2026 - 0:34

score 21 · Answer 14 · 2026-04-12 16:00:13

21

Views

How to find the recurrence relation of an increasing-decreasing sequence?

Published on 12 Apr 2026 - 16:00

score 336 · Answer 15 · 2026-04-15 22:49:57

336

Views

Generalized log integral $\int_{0}^{\frac{\pi}{2}}\log(a+\sin(x))\,dx$

Published on 15 Apr 2026 - 22:49

List Question

Random walk and inequality involving the Green function on N step

An attempt to prove Kadeishvili's theorem

Brezis' exercise 6.22.3: construct an example in $E=\mathbb{R}^2$ such that $Q(E V(T)) \neq E V(Q(T))$ and $Q(\sigma(T)) \neq \sigma(Q(T))$

Show that if a subset of a metric space is sequentially closed then it is closed

If $T$ is self-adjoint, then $T^2 + tI$ is bijective for any $t>0$

How many people must be in a room until it is at least a $50\%$ chance that two will have the same amount of change?

Brezis' exercise 6.22.4: prove that $Q(T)$ is bijective

Proof: Any CDF (Cumulative Distribution Function) has a uniform distribution

Combinatorial Proof of the identity $\sum_{k=1}^{n}k\binom{n}{k} = n2^{n-1}$.

Evaluating the integral $\oint \coth(\frac{1}{2}z) dz$ taken over the contour $C$ and $|z-\frac{\pi}{2}i|^{2} = 1$

Expected length of sequence of positive integers which sums to $2023$

Missing step in my proof for $\exists x! P(x)$

Verification of a Simple Proof...

How to find the recurrence relation of an increasing-decreasing sequence?

Generalized log integral $\int_{0}^{\frac{\pi}{2}}\log(a+\sin(x))\,dx$

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