Question

Proving $[0,2]\big/[1,2]$ is homeomorphic to $[0,1]$

score 403 · Answer 1 · 2026-04-13 19:16:36

403

Views

Proving $[0,2]\big/[1,2]$ is homeomorphic to $[0,1]$

Published on 13 Apr 2026 - 19:16

score 54 · Answer 2 · 2026-04-16 09:12:23

54

Views

Is the collection $\{ a\,\times\, b\,|\,a\in A ,\, b\in B\}$ a set?

Published on 16 Apr 2026 - 9:12

score 53 · Answer 3 · 2026-04-13 17:16:17

53

Views

Proof that the error between $W(\lambda(\sqrt{n}))$ and the fraction of composite integers in $\mathbb{O}_n$ declines as $n$ increases.

Published on 13 Apr 2026 - 17:16

score 312 · Answer 4 · 2026-05-06 23:53:09

312

Views

Erdos conjecture on arithmetic progression

Published on 06 May 2026 - 23:53

score 38 · Answer 5 · 2026-04-15 19:39:37

38

Views

I'm confused about a boolean algebra simplification that somewhat resembles common identities

Published on 15 Apr 2026 - 19:39

score 88 · Answer 6 · 2026-04-13 07:59:22

88

Views

The $\sigma$-algebra generated by $f^{-1}\mathcal{Z}$, where $\mathcal{Z}$ generates $\mathcal{A}$

Published on 13 Apr 2026 - 7:59

score 27 · Answer 7 · 2026-04-16 06:23:12

27

Views

Is this enough to prove the following set theory relation?

Published on 16 Apr 2026 - 6:23

score 261 · Answer 8 · 2026-04-14 01:40:17

261

Views

Let $\mathbb{R}^2$ be provided with component-wise multiplication $\cdot$ and component-wise addition $+$. Does $(\mathbb{R}^2,+,\cdot)$ form a field?

Published on 14 Apr 2026 - 1:40

score 1k · Answer 9 · 2026-04-15 18:56:38

1k

Views

If $X$ is normal and $A \subset X$ is closed, then the quotient space $X/A$ is normal.

Published on 15 Apr 2026 - 18:56

score 177 · Answer 10 · 2026-04-11 05:27:53

177

Views

Finding solution PDE on semi infinite domain

Published on 11 Apr 2026 - 5:27

score 64 · Answer 11 · 2026-04-11 21:26:36

64

Views

Proof Verification, family of sets

Published on 11 Apr 2026 - 21:26

score 525 · Answer 12 · 2026-05-14 06:19:56

525

Views

Understanding a proof that a compact multiplication operator is zero

Published on 14 May 2026 - 6:19

score 124 · Answer 13 · 2026-04-12 05:18:44

124

Views

If $p>5$ is prime and $2p+1$ is prime, then $4p+1$ is composite.

Published on 12 Apr 2026 - 5:18

score 51 · Answer 14 · 2026-04-10 17:44:00

51

Views

Elementary Question Regarding Subgroups in Abstract Algebra

Published on 10 Apr 2026 - 17:44

score 31 · Answer 15 · 2026-04-14 18:20:26

31

Views

Derivation from complex simultaneous equations (transmission of a resonator)

Published on 14 Apr 2026 - 18:20

List Question

Proving $[0,2]\big/[1,2]$ is homeomorphic to $[0,1]$

Is the collection $\{ a\,\times\, b\,|\,a\in A ,\, b\in B\}$ a set?

Proof that the error between $W(\lambda(\sqrt{n}))$ and the fraction of composite integers in $\mathbb{O}_n$ declines as $n$ increases.

Erdos conjecture on arithmetic progression

I'm confused about a boolean algebra simplification that somewhat resembles common identities

The $\sigma$-algebra generated by $f^{-1}\mathcal{Z}$, where $\mathcal{Z}$ generates $\mathcal{A}$

Is this enough to prove the following set theory relation?

Let $\mathbb{R}^2$ be provided with component-wise multiplication $\cdot$ and component-wise addition $+$. Does $(\mathbb{R}^2,+,\cdot)$ form a field?

If $X$ is normal and $A \subset X$ is closed, then the quotient space $X/A$ is normal.

Finding solution PDE on semi infinite domain

Proof Verification, family of sets

Understanding a proof that a compact multiplication operator is zero

If $p>5$ is prime and $2p+1$ is prime, then $4p+1$ is composite.

Elementary Question Regarding Subgroups in Abstract Algebra

Derivation from complex simultaneous equations (transmission of a resonator)

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