Question

Is the set $A := \{v \in \mathbb{R}^n \mid d(v,B) \leq \epsilon\}$ compact?

score 42 · Answer 1 · 2018-04-08 19:03:28

42

Views

Is the set $A := \{v \in \mathbb{R}^n \mid d(v,B) \leq \epsilon\}$ compact?

Published on 08 Apr 2018 - 19:03

score 1.4k · Answer 2 · 2018-04-08 19:44:38

1.4k

Views

Show every prime $p\equiv 1,3$ (mod 8) can be written as $p=x^2+2y^2$

Published on 08 Apr 2018 - 19:44

score 108 · Answer 3 · 2026-03-25 06:00:14

108

Views

Check My Work: Chain Rule doesn't work when differentiating $x^{\ln(x)}$ ??

Published on 25 Mar 2026 - 6:00

score 44 · Answer 4 · 2026-03-25 06:01:34

44

Views

Fidning roots of an arbitrary polynomial with a specific pattern

Published on 25 Mar 2026 - 6:01

score 1.4k · Answer 5 · 2026-03-25 04:38:06

1.4k

Views

Proving the Harnack Inequality for Harmonic Functions

Published on 25 Mar 2026 - 4:38

score 4k · Answer 6 · 2018-04-08 21:53:09

4k

Views

Show that f is continuous on x if and only if x is irrational

Published on 08 Apr 2018 - 21:53

score 429 · Answer 7 · 2026-03-25 22:10:05

429

Views

Show that $f_n$ is continuous at $0$

Published on 25 Mar 2026 - 22:10

score 309 · Answer 8 · 2026-03-25 04:24:08

309

Views

Let $p$ be a prime number. Show that the number of solutions to $x^k \equiv 1 \pmod p$ is $gcd(k, p-1)$

Published on 25 Mar 2026 - 4:24

score 99 · Answer 9 · 2018-04-09 03:35:42

99

Views

Where’s the error in my factorial proof?

Published on 09 Apr 2018 - 3:35

score 54 · Answer 10 · 2018-04-09 09:33:35

54

Views

Law of total probability random variable proof

Published on 09 Apr 2018 - 9:33

score 15 · Answer 11 · 2026-03-06 23:21:35

15

Views

The proof of $F_{X|A}(-\infty) = 0$ and $F_{X|A}(\infty) = 1$

Published on 06 Mar 2026 - 23:21

score 4.3k · Answer 12 · 2026-03-26 13:51:27

4.3k

Views

To show that the contravariant $\text{Hom}$ functor is left-exact

Published on 26 Mar 2026 - 13:51

score 643 · Answer 13 · 2026-03-26 20:25:50

643

Views

The linear operator $T_A(B)=AB-BA$ defined on $\mathbb M_n(\mathbb C)$ has a null determinant

Published on 26 Mar 2026 - 20:25

score 311 · Answer 14 · 2026-03-27 23:39:41

311

Views

Altitudes and Circumcircle

Published on 27 Mar 2026 - 23:39

score 392 · Answer 15 · 2026-03-25 16:40:12

392

Views

Given $z+x\ln(z)+xe^{xy}-1=0$ find the directional derivative at $P=(0,1)$ in the direction of $v= \langle 4 \sqrt{3} , 3 \sqrt{3} \rangle$

Published on 25 Mar 2026 - 16:40

List Question

Is the set $A := \{v \in \mathbb{R}^n \mid d(v,B) \leq \epsilon\}$ compact?

Show every prime $p\equiv 1,3$ (mod 8) can be written as $p=x^2+2y^2$

Check My Work: Chain Rule doesn't work when differentiating $x^{\ln(x)}$ ??

Fidning roots of an arbitrary polynomial with a specific pattern

Proving the Harnack Inequality for Harmonic Functions

Show that f is continuous on x if and only if x is irrational

Show that $f_n$ is continuous at $0$

Let $p$ be a prime number. Show that the number of solutions to $x^k \equiv 1 \pmod p$ is $gcd(k, p-1)$

Where’s the error in my factorial proof?

Law of total probability random variable proof

The proof of $F_{X|A}(-\infty) = 0$ and $F_{X|A}(\infty) = 1$

To show that the contravariant $\text{Hom}$ functor is left-exact

The linear operator $T_A(B)=AB-BA$ defined on $\mathbb M_n(\mathbb C)$ has a null determinant

Altitudes and Circumcircle

Given $z+x\ln(z)+xe^{xy}-1=0$ find the directional derivative at $P=(0,1)$ in the direction of $v= \langle 4 \sqrt{3} , 3 \sqrt{3} \rangle$

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