Question

every open set in the extended real line ($\overline{\mathbb R}$) is a countable union of segments

score 562 · Answer 1 · 2018-03-15 14:54:59

562

Views

every open set in the extended real line ($\overline{\mathbb R}$) is a countable union of segments

Published on 15 Mar 2018 - 14:54

score 82 · Answer 2 · 2026-03-26 17:31:06

82

Views

Integration over Sphere

Published on 26 Mar 2026 - 17:31

score 141 · Answer 3 · 2018-03-15 15:43:13

141

Views

Let a and b be such that $-2A^2 + 4A -3I_2 = aA + bI_2$. To find $a + b$.

Published on 15 Mar 2018 - 15:43

score 58 · Answer 4 · 2018-03-15 15:55:48

58

Views

Is $g(x)=x^3$ surjective on $\Bbb R$?

Published on 15 Mar 2018 - 15:55

score 36 · Answer 5 · 2018-03-15 16:23:12

36

Views

Homeomorphism of $K$ and $K\cup \{0\}$

Published on 15 Mar 2018 - 16:23

score 1.7k · Answer 6 · 2026-03-28 23:59:14

1.7k

Views

(Proof Check) Cosets: $aH=Ha$ if and only if $H=aHa^{-1}$ and question about coset multiplication

Published on 28 Mar 2026 - 23:59

score 382 · Answer 7 · 2026-03-25 04:43:51

382

Views

Prove that for homomorphism $\phi:G\to H$ if $G_{1}\leq G$ is abelian, then $\phi(G_{1})$ is abelian.

Published on 25 Mar 2026 - 4:43

score 62 · Answer 8 · 2018-03-15 19:01:55

62

Views

Existence of another critical point

Published on 15 Mar 2018 - 19:01

score 127 · Answer 9 · 2018-03-15 20:20:22

127

Views

Existence of a critical point between two local minimum

Published on 15 Mar 2018 - 20:20

score 298 · Answer 10 · 2018-03-15 21:10:12

298

Views

Simple proof of $\ln x \leq x-1$

Published on 15 Mar 2018 - 21:10

score 43 · Answer 11 · 2018-03-15 21:34:56

43

Views

$x_{1}$ and $x_{2}$ roots of $f$ with $f'(x_{1}) \gt 0$ and $f'(x_{2}) \gt 0$. Existence of another root between $(x_{1},x_{2})$.

Published on 15 Mar 2018 - 21:34

score 66 · Answer 12 · 2018-03-16 02:04:54

66

Views

Convergence of a sequence with $0<a_n<1$

Published on 16 Mar 2018 - 2:04

score 38 · Answer 13 · 2018-03-16 02:53:10

38

Views

Checking proofs of convergence in $\ell^2$ with respect to uniform, strong and weak operator topologies?

Published on 16 Mar 2018 - 2:53

score 1.6k · Answer 14 · 2026-03-25 16:40:16

1.6k

Views

Prove that if $G$ is a $k$-edge-connected graph, then $G+K_1$ is $(k+1)$ -edge-connected (my proof)

Published on 25 Mar 2026 - 16:40

score 66 · Answer 15 · 2018-03-16 02:59:10

66

Views

Set proof for intro to pure math class: $(A-C)\subseteq (A-B)\cup (B-C)$

Published on 16 Mar 2018 - 2:59

List Question

every open set in the extended real line ($\overline{\mathbb R}$) is a countable union of segments

Integration over Sphere

Let a and b be such that $-2A^2 + 4A -3I_2 = aA + bI_2$. To find $a + b$.

Is $g(x)=x^3$ surjective on $\Bbb R$?

Homeomorphism of $K$ and $K\cup \{0\}$

(Proof Check) Cosets: $aH=Ha$ if and only if $H=aHa^{-1}$ and question about coset multiplication

Prove that for homomorphism $\phi:G\to H$ if $G_{1}\leq G$ is abelian, then $\phi(G_{1})$ is abelian.

Existence of another critical point

Existence of a critical point between two local minimum

Simple proof of $\ln x \leq x-1$

$x_{1}$ and $x_{2}$ roots of $f$ with $f'(x_{1}) \gt 0$ and $f'(x_{2}) \gt 0$. Existence of another root between $(x_{1},x_{2})$.

Convergence of a sequence with $0<a_n<1$

Checking proofs of convergence in $\ell^2$ with respect to uniform, strong and weak operator topologies?

Prove that if $G$ is a $k$-edge-connected graph, then $G+K_1$ is $(k+1)$ -edge-connected (my proof)

Set proof for intro to pure math class: $(A-C)\subseteq (A-B)\cup (B-C)$

Trending Questions

Popular # Hahtags

Popular Questions