Question

Is this a valid proof for checking if a number K is dividable by 11,

score 53 · Answer 1 · 2026-04-14 06:44:48

53

Views

Is this a valid proof for checking if a number K is dividable by 11,

Published on 14 Apr 2026 - 6:44

score 154 · Answer 2 · 2026-04-15 20:09:38

154

Views

A linear map $f: E \to F$ is continuous if and only if $f$ is sequentially continuous.

Published on 15 Apr 2026 - 20:09

score 47 · Answer 3 · 2026-04-15 12:39:29

47

Views

Determine if relation $R$ is an equivalence relation and if it is describe the equivalence classes. $(x-y) \cup (y-x)$

Published on 15 Apr 2026 - 12:39

score 51 · Answer 4 · 2026-04-14 04:24:48

51

Views

Studying the nature of roots?

Published on 14 Apr 2026 - 4:24

score 1.1k · Answer 5 · 2026-04-12 04:34:37

1.1k

Views

In a metric space, compact implies sequentially compact

Published on 12 Apr 2026 - 4:34

score 364 · Answer 6 · 2026-04-15 06:50:57

364

Views

Validity of Proof of Sum of First $n$ Natural Numbers

Published on 15 Apr 2026 - 6:50

score 619 · Answer 7 · 2026-04-17 14:08:49

619

Views

If $ \gcd(a,b) = 1$ prove that $ \gcd(2a+b, a+2b) = 1$ or $3$?

Published on 17 Apr 2026 - 14:08

score 215 · Answer 8 · 2026-04-17 08:29:57

215

Views

Verification: Determining the order of factor group $G=(\mathbb Z \oplus \mathbb Z)/\langle(2,2)\rangle$. Is the group cyclic?

Published on 17 Apr 2026 - 8:29

score 70 · Answer 9 · 2026-03-25 07:46:01

70

Views

$X^3Y+Y^3+X\in \Bbb Z_2[X,Y]$ is irreducible in $\Bbb Z_2[X,Y]$

Published on 25 Mar 2026 - 7:46

score 58 · Answer 10 · 2026-04-15 10:54:28

58

Views

$f^(U_1 \times ... \times U_k) = \bigcap_{i=1}^k f^_i(U_i)$

Published on 15 Apr 2026 - 10:54

score 64 · Answer 11 · 2026-04-11 07:16:16

64

Views

A falling object does not keep accelerating indefinitely but, due to air resistance, reaches a terminal speed. What is the terminal speed?

Published on 11 Apr 2026 - 7:16

score 107 · Answer 12 · 2026-04-16 12:24:12

107

Views

$\forall x \in \mathbb{R}(\exists !M \in \mathbb{Z} (M \leq x < M+1))$: Cauchy Sequences

Published on 16 Apr 2026 - 12:24

score 80 · Answer 13 · 2026-04-16 11:11:44

80

Views

It's given $ABCD$ an isosceles trapezioid with $A(2,6,-3,9),\, B(4,4,7,3),\, C(8,2,7,-1)$, $AB||CD$, find $D$.

Published on 16 Apr 2026 - 11:11

score 119 · Answer 14 · 2026-04-17 15:05:51

119

Views

Evaluating $\lim _{m\to\infty}\left(\frac1{m^2}+\frac2{m^2}+\frac3{m^2}+\cdots+\frac{m}{m^2}\right)$. Where's my error?

Published on 17 Apr 2026 - 15:05

score 43 · Answer 15 · 2026-03-26 22:53:37

43

Views

Prove that the Alexander Polynomial does not depend on which column is eliminated from the crossing/arc matrix.

Published on 26 Mar 2026 - 22:53

List Question

Is this a valid proof for checking if a number K is dividable by 11,

A linear map $f: E \to F$ is continuous if and only if $f$ is sequentially continuous.

Determine if relation $R$ is an equivalence relation and if it is describe the equivalence classes. $(x-y) \cup (y-x)$

Studying the nature of roots?

In a metric space, compact implies sequentially compact

Validity of Proof of Sum of First $n$ Natural Numbers

If $ \gcd(a,b) = 1$ prove that $ \gcd(2a+b, a+2b) = 1$ or $3$?

Verification: Determining the order of factor group $G=(\mathbb Z \oplus \mathbb Z)/\langle(2,2)\rangle$. Is the group cyclic?

$X^3Y+Y^3+X\in \Bbb Z_2[X,Y]$ is irreducible in $\Bbb Z_2[X,Y]$

$f^(U_1 \times ... \times U_k) = \bigcap_{i=1}^k f^_i(U_i)$

A falling object does not keep accelerating indefinitely but, due to air resistance, reaches a terminal speed. What is the terminal speed?

$\forall x \in \mathbb{R}(\exists !M \in \mathbb{Z} (M \leq x < M+1))$: Cauchy Sequences

It's given $ABCD$ an isosceles trapezioid with $A(2,6,-3,9),\, B(4,4,7,3),\, C(8,2,7,-1)$, $AB||CD$, find $D$.

Evaluating $\lim _{m\to\infty}\left(\frac1{m^2}+\frac2{m^2}+\frac3{m^2}+\cdots+\frac{m}{m^2}\right)$. Where's my error?

Prove that the Alexander Polynomial does not depend on which column is eliminated from the crossing/arc matrix.

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