Question

Existence of a function $\psi$ satisfying $\lim_{r\to 0}r\psi\left(r\right)=\lim_{r\to \infty}r\psi\left(r\right)=0$

score 60 · Answer 1 · 2026-04-15 19:40:40

60

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Existence of a function $\psi$ satisfying $\lim_{r\to 0}r\psi\left(r\right)=\lim_{r\to \infty}r\psi\left(r\right)=0$

Published on 15 Apr 2026 - 19:40

score 55 · Answer 2 · 2026-04-14 12:13:29

55

Views

Is it possible given random variables X and Y for $E[XY] = E[X]E[Y]$ if X and Y are dependent variables?

Published on 14 Apr 2026 - 12:13

score 256 · Answer 3 · 2026-04-15 09:50:29

256

Views

reduced suspensions and the non-associativity of smash products

Published on 15 Apr 2026 - 9:50

score 65 · Answer 4 · 2026-04-15 04:47:31

65

Views

left cosets of $\langle18\rangle$ in $\mathbb{Z}_{26}$.

Published on 15 Apr 2026 - 4:47

score 170 · Answer 5 · 2026-04-14 09:36:43

170

Views

Is this a known property of cofactors?

Published on 14 Apr 2026 - 9:36

score 1.3k · Answer 6 · 2026-04-15 19:13:32

1.3k

Views

Give $[0,1]^{\omega}$ the uniform topology. Find an infinite subset of this space that has no limit point.

Published on 15 Apr 2026 - 19:13

score 55 · Answer 7 · 2026-04-11 07:57:53

55

Views

Permutations Inverses

Published on 11 Apr 2026 - 7:57

score 199 · Answer 8 · 2026-04-12 05:30:30

199

Views

When can we extend a countably-additive set function on a Dynkin system to be a (probability) measure?

Published on 12 Apr 2026 - 5:30

score 113 · Answer 9 · 2026-04-15 21:55:13

113

Views

Product of limits: If $\lim_{n\to\infty} u_nv_n=0$, does it mean that $\lim_{n\to\infty} u_n=0$ or $\lim_{n\to\infty} v_n=0$?

Published on 15 Apr 2026 - 21:55

score 536 · Answer 10 · 2026-04-15 09:06:55

536

Views

Bernoulli's inequality - counterexample

Published on 15 Apr 2026 - 9:06

score 797 · Answer 11 · 2026-03-27 03:45:15

797

Views

Showing simple transpositions given a permutation

Published on 27 Mar 2026 - 3:45

score 4.2k · Answer 12 · 2026-04-15 23:00:43

4.2k

Views

Listing all the distinct left cosets

Published on 15 Apr 2026 - 23:00

score 91 · Answer 13 · 2026-04-10 06:05:17

91

Views

General Brouwer's theorem

Published on 10 Apr 2026 - 6:05

score 151 · Answer 14 · 2026-03-27 13:40:09

151

Views

Applying L'Hopital's Rule without hypothesis on numerator

Published on 27 Mar 2026 - 13:40

score 223 · Answer 15 · 2026-04-13 12:32:06

223

Views

Counterexample to show that a formula is not logically valid?

Published on 13 Apr 2026 - 12:32

List Question

Existence of a function $\psi$ satisfying $\lim_{r\to 0}r\psi\left(r\right)=\lim_{r\to \infty}r\psi\left(r\right)=0$

Is it possible given random variables X and Y for $E[XY] = E[X]E[Y]$ if X and Y are dependent variables?

reduced suspensions and the non-associativity of smash products

left cosets of $\langle18\rangle$ in $\mathbb{Z}_{26}$.

Is this a known property of cofactors?

Give $[0,1]^{\omega}$ the uniform topology. Find an infinite subset of this space that has no limit point.

Permutations Inverses

When can we extend a countably-additive set function on a Dynkin system to be a (probability) measure?

Product of limits: If $\lim_{n\to\infty} u_nv_n=0$, does it mean that $\lim_{n\to\infty} u_n=0$ or $\lim_{n\to\infty} v_n=0$?

Bernoulli's inequality - counterexample

Showing simple transpositions given a permutation

Listing all the distinct left cosets

General Brouwer's theorem

Applying L'Hopital's Rule without hypothesis on numerator

Counterexample to show that a formula is not logically valid?

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