Question

Choose normal to surfaces to enforce their positivity definition

score 30 · Answer 1 · 2026-04-11 19:36:57

30

Views

Choose normal to surfaces to enforce their positivity definition

Published on 11 Apr 2026 - 19:36

score 66 · Answer 2 · 2018-10-13 14:18:10

66

Views

Proof Check: Let $f_{0}(x)=\frac{1}{1-x},$ and $f_{n}(x)=f_{0}(f_{n-1}(x))$ for any positive integer $n$. Find $f_{2018}(2018)$

Published on 13 Oct 2018 - 14:18

score 1.2k · Answer 3 · 2026-04-11 08:24:15

1.2k

Views

If $A$ is open then $\text{Int}(A)=A$

Published on 11 Apr 2026 - 8:24

score 419 · Answer 4 · 2026-04-11 04:49:51

419

Views

How can I prove that following Statements are true or false?

Published on 11 Apr 2026 - 4:49

score 248 · Answer 5 · 2026-03-29 16:00:53

248

Views

Let $E$ and $F$ be a compact set on un metric space $(X,d)$. Show that dist$(E,F)>0$ if and only if $E \cap F = \emptyset $

Published on 29 Mar 2026 - 16:00

score 43 · Answer 6 · 2018-10-13 19:45:38

43

Views

Proving that $(a,b)\cong [1,2)$.

Published on 13 Oct 2018 - 19:45

score 63 · Answer 7 · 2026-04-12 03:45:42

63

Views

Constructing a bijection between $(0,1)$ and $[0,1]$.

Published on 12 Apr 2026 - 3:45

score 716 · Answer 8 · 2026-03-27 22:53:10

716

Views

Using Lie's theorem to prove that Rad $L = Z(L)$ for $L=\mathfrak{sl}(V)$

Published on 27 Mar 2026 - 22:53

score 291 · Answer 9 · 2026-04-12 09:03:47

291

Views

Common root of two cubic equations

Published on 12 Apr 2026 - 9:03

score 48 · Answer 10 · 2026-03-26 02:54:27

48

Views

Stuck on a term in $Var[\hat{\beta_o}]$ Proof

Published on 26 Mar 2026 - 2:54

score 401 · Answer 11 · 2026-04-11 21:29:10

401

Views

A space is $T_0$ if and only if it is homeomorphic to a subpspace of $S^I$ with $S$ the Sierpinski space for some $I$ [Proof Verification]

Published on 11 Apr 2026 - 21:29

score 256 · Answer 12 · 2026-03-25 22:03:43

256

Views

Prove $\lim_{x \rightarrow 3}x^2=9$ via delta epsilon

Published on 25 Mar 2026 - 22:03

score 48 · Answer 13 · 2026-03-26 14:22:51

48

Views

Let $\mathfrak F$ be the set of injective mappings $f:\Bbb N\to\Bbb N$. Then $|\mathfrak F|=2^{\aleph_0}$

Published on 26 Mar 2026 - 14:22

score 24 · Answer 14 · 2026-03-25 07:45:27

24

Views

Elements in the basis of Product topology determined by sub-basis other than sub-basis elements.

Published on 25 Mar 2026 - 7:45

score 95 · Answer 15 · 2018-10-14 05:08:22

95

Views

Let $G$ be a group, with $H$ normal within it such that $|G| = r|H|$. Show that $g^r \in H$ for all $g \in G$.

Published on 14 Oct 2018 - 5:08

List Question

Choose normal to surfaces to enforce their positivity definition

Proof Check: Let $f_{0}(x)=\frac{1}{1-x},$ and $f_{n}(x)=f_{0}(f_{n-1}(x))$ for any positive integer $n$. Find $f_{2018}(2018)$

If $A$ is open then $\text{Int}(A)=A$

How can I prove that following Statements are true or false?

Let $E$ and $F$ be a compact set on un metric space $(X,d)$. Show that dist$(E,F)>0$ if and only if $E \cap F = \emptyset $

Proving that $(a,b)\cong [1,2)$.

Constructing a bijection between $(0,1)$ and $[0,1]$.

Using Lie's theorem to prove that Rad $L = Z(L)$ for $L=\mathfrak{sl}(V)$

Common root of two cubic equations

Stuck on a term in $Var[\hat{\beta_o}]$ Proof

A space is $T_0$ if and only if it is homeomorphic to a subpspace of $S^I$ with $S$ the Sierpinski space for some $I$ [Proof Verification]

Prove $\lim_{x \rightarrow 3}x^2=9$ via delta epsilon

Let $\mathfrak F$ be the set of injective mappings $f:\Bbb N\to\Bbb N$. Then $|\mathfrak F|=2^{\aleph_0}$

Elements in the basis of Product topology determined by sub-basis other than sub-basis elements.

Let $G$ be a group, with $H$ normal within it such that $|G| = r|H|$. Show that $g^r \in H$ for all $g \in G$.

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