Question

Please Check my proof: $\mathbb{Q}(\sqrt2,\sqrt3) = \mathbb{Q}(\sqrt2 +\sqrt3)$

score 209 · Answer 1 · 2018-07-04 11:14:30

209

Views

Please Check my proof: $\mathbb{Q}(\sqrt2,\sqrt3) = \mathbb{Q}(\sqrt2 +\sqrt3)$

Published on 04 Jul 2018 - 11:14

score 72 · Answer 2 · 2018-07-04 13:36:28

72

Views

Proving that $\lim_{n\to\infty}x_n = x$ implies that $\lim_{n\to\infty}p(x_n) = p(x)$ where $p$ is a polynomial.

Published on 04 Jul 2018 - 13:36

score 739 · Answer 3 · 2026-03-27 11:16:14

739

Views

Question about a proof (Rouches Theorem)

Published on 27 Mar 2026 - 11:16

score 225 · Answer 4 · 2026-03-30 17:06:32

225

Views

Proof that involving inequalities and complex numbers

Published on 30 Mar 2026 - 17:06

score 93 · Answer 5 · 2026-03-29 10:08:55

93

Views

Verification of a proof of some equivalents of AC

Published on 29 Mar 2026 - 10:08

score 143 · Answer 6 · 2026-03-25 07:48:20

143

Views

Uniform limit of functions with intermediate value property has intermediate value property? Where is the error in this proof?

Published on 25 Mar 2026 - 7:48

score 51 · Answer 7 · 2026-03-26 12:08:28

51

Views

$\frac{u_n}{1+u^2_n} \longrightarrow \frac{u}{1+u^2}\quad \text{ strongly in }L^1(\mathbb R).$

Published on 26 Mar 2026 - 12:08

score 162 · Answer 8 · 2018-07-05 00:31:15

162

Views

Evaluating $\lim_{n\to\infty}\frac{n^3+6n^2}{2n^2+5n+6}$

Published on 05 Jul 2018 - 0:31

score 32 · Answer 9 · 2018-07-05 11:07:01

32

Views

Request for comments on the validity of the following constructed proofs

Published on 05 Jul 2018 - 11:07

score 3.9k · Answer 10 · 2026-03-26 01:10:18

3.9k

Views

$T^*$ is invertible whenever $T$ is invertible.

Published on 26 Mar 2026 - 1:10

score 153 · Answer 11 · 2018-07-05 15:20:43

153

Views

Question regarding equivalence of irreducibles and primes in UFD.

Published on 05 Jul 2018 - 15:20

score 66 · Answer 12 · 2018-07-05 17:41:30

66

Views

Suppose $\lim y_n = y$, is this a valid proof of $\lim \frac{1}{y_n} = \frac{1}{y}$

Published on 05 Jul 2018 - 17:41

score 99 · Answer 13 · 2018-07-05 19:27:03

99

Views

Modeling counting problems - Proof verification

Published on 05 Jul 2018 - 19:27

score 92 · Answer 14 · 2026-03-25 16:09:40

92

Views

Given $(G,*)$ a group. Show the function $f: G \to G$ defined as $f(a)=a^{2}$ is an homomorphism if and only if G is abelian.

Published on 25 Mar 2026 - 16:09

score 2.8k · Answer 15 · 2026-03-26 01:04:39

2.8k

Views

If sup A $\lt$ sup B show that an element of $B$ is an upper bound of $A$

Published on 26 Mar 2026 - 1:04

List Question

Please Check my proof: $\mathbb{Q}(\sqrt2,\sqrt3) = \mathbb{Q}(\sqrt2 +\sqrt3)$

Proving that $\lim_{n\to\infty}x_n = x$ implies that $\lim_{n\to\infty}p(x_n) = p(x)$ where $p$ is a polynomial.

Question about a proof (Rouches Theorem)

Proof that involving inequalities and complex numbers

Verification of a proof of some equivalents of AC

Uniform limit of functions with intermediate value property has intermediate value property? Where is the error in this proof?

$\frac{u_n}{1+u^2_n} \longrightarrow \frac{u}{1+u^2}\quad \text{ strongly in }L^1(\mathbb R).$

Evaluating $\lim_{n\to\infty}\frac{n^3+6n^2}{2n^2+5n+6}$

Request for comments on the validity of the following constructed proofs

$T^*$ is invertible whenever $T$ is invertible.

Question regarding equivalence of irreducibles and primes in UFD.

Suppose $\lim y_n = y$, is this a valid proof of $\lim \frac{1}{y_n} = \frac{1}{y}$

Modeling counting problems - Proof verification

Given $(G,*)$ a group. Show the function $f: G \to G$ defined as $f(a)=a^{2}$ is an homomorphism if and only if G is abelian.

If sup A $\lt$ sup B show that an element of $B$ is an upper bound of $A$

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