Question

Solution Sets of Homogeneous Systems

score 78 · Answer 1 · 2015-10-03 21:41:15

78

Views

Solution Sets of Homogeneous Systems

Published on 03 Oct 2015 - 21:41

score 404 · Answer 2 · 2015-10-04 10:05:36

404

Views

Starting index of a sequence is irrelevant

Published on 04 Oct 2015 - 10:05

score 585 · Answer 3 · 2015-10-05 04:16:43

585

Views

Proof of sets. Need an example

Published on 05 Oct 2015 - 4:16

score 251 · Answer 4 · 2026-04-05 14:46:02

251

Views

How to show this cover of $\mathbb{Q}$ doesn't cover $\mathbb{R}$?

Published on 05 Apr 2026 - 14:46

score 147 · Answer 5 · 2026-04-03 09:28:17

147

Views

Is there a way to show that $\gcd(a,b) = ax + by $ without also showing that its the smallest positive linear combination?

Published on 03 Apr 2026 - 9:28

score 150 · Answer 6 · 2026-04-03 09:29:34

150

Views

How do you show if $d \mid a$ and $d \mid b$ then $d \mid \gcd(a,b)$ without knowing that $\gcd(a,b)$ is a linear combination of $a$ and $b$?

Published on 03 Apr 2026 - 9:29

score 397 · Answer 7 · 2015-10-07 16:32:39

397

Views

Is this a correct proof of why $\gcd(a,b) = \gcd(b, a- b)$?

Published on 07 Oct 2015 - 16:32

score 98 · Answer 8 · 2015-10-07 21:06:40

98

Views

Is the following proof correct of why $\gcd(a,b)$ smallest linear combination of $a$ and $b$?

Published on 07 Oct 2015 - 21:06

score 446 · Answer 9 · 2015-10-08 22:35:38

446

Views

Proof that $\lim_{x\to0}\frac{\sin x}x=1$

Published on 08 Oct 2015 - 22:35

score 39 · Answer 10 · 2026-04-03 02:39:50

39

Views

Is there other ways to show reverse triangle inequality

Published on 03 Apr 2026 - 2:39

score 124 · Answer 11 · 2015-10-11 02:54:18

124

Views

Let $\{a_n\}$ be a sequence, $a,b$ given so that $\lim\limits_{n\rightarrow\infty} a_n=a$ and $\lim\limits_{n\rightarrow\infty} a_n=b$, then $a=b$.

Published on 11 Oct 2015 - 2:54

score 496 · Answer 12 · 2026-03-28 09:45:43

496

Views

Linear maps preserving the determinant and Hermiticity

Published on 28 Mar 2026 - 9:45

score 5.3k · Answer 13 · 2026-02-28 17:45:56

5.3k

Views

Let $f(x) = 1$ for rational numbers $x$, and $f(x)=0$ for irrational numbers. Show $f$ is discontinuous at every $x$ in $\mathbb{R}$

Published on 28 Feb 2026 - 17:45

score 192 · Answer 14 · 2026-03-02 04:22:57

192

Views

Symmetric proof for the probability of real roots of a quadratic with exponentially distributed parameters

Published on 02 Mar 2026 - 4:22

score 1.3k · Answer 15 · 2026-03-09 05:52:34

1.3k

Views

Characteristic polynomial of adjoint

Published on 09 Mar 2026 - 5:52

List Question

Solution Sets of Homogeneous Systems

Starting index of a sequence is irrelevant

Proof of sets. Need an example

How to show this cover of $\mathbb{Q}$ doesn't cover $\mathbb{R}$?

Is there a way to show that $\gcd(a,b) = ax + by $ without also showing that its the smallest positive linear combination?

How do you show if $d \mid a$ and $d \mid b$ then $d \mid \gcd(a,b)$ without knowing that $\gcd(a,b)$ is a linear combination of $a$ and $b$?

Is this a correct proof of why $\gcd(a,b) = \gcd(b, a- b)$?

Is the following proof correct of why $\gcd(a,b)$ smallest linear combination of $a$ and $b$?

Proof that $\lim_{x\to0}\frac{\sin x}x=1$

Is there other ways to show reverse triangle inequality

Let $\{a_n\}$ be a sequence, $a,b$ given so that $\lim\limits_{n\rightarrow\infty} a_n=a$ and $\lim\limits_{n\rightarrow\infty} a_n=b$, then $a=b$.

Linear maps preserving the determinant and Hermiticity

Let $f(x) = 1$ for rational numbers $x$, and $f(x)=0$ for irrational numbers. Show $f$ is discontinuous at every $x$ in $\mathbb{R}$

Symmetric proof for the probability of real roots of a quadratic with exponentially distributed parameters

Characteristic polynomial of adjoint

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