Question

$f$ is continuous and of bounded variation on $[a,b]$, then $V[a,x]$ is continuous?

score 1k · Answer 1 · 2026-04-14 04:34:05

1k

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$f$ is continuous and of bounded variation on $[a,b]$, then $V[a,x]$ is continuous?

Published on 14 Apr 2026 - 4:34

score 1.9k · Answer 2 · 2026-04-16 01:21:20

1.9k

Views

Find the largest interval where the Initial Value Problem $y'(t)=t+sin(y(t))$ with $y(2)=1$ has a unique solution. Using Picard-Lindelof Theorem.

Published on 16 Apr 2026 - 1:21

score 104 · Answer 3 · 2026-04-12 22:06:55

104

Views

How to prove an equivalence of two equations?

Published on 12 Apr 2026 - 22:06

score 70 · Answer 4 · 2026-04-16 00:31:42

70

Views

Prove $\mathbb{Q}(\zeta)$ is a field when $\zeta$ is algebraic

Published on 16 Apr 2026 - 0:31

score 3.6k · Answer 5 · 2026-04-13 07:26:40

3.6k

Views

When does the complete bipartite graph K n,m have an Euler Trail(Path)?

Published on 13 Apr 2026 - 7:26

score 279 · Answer 6 · 2026-04-14 02:00:16

279

Views

Differentiability of $g(x)\sin(1/x)$ at $x=0$.

Published on 14 Apr 2026 - 2:00

score 135 · Answer 7 · 2026-04-13 18:06:52

135

Views

An element of a set with a finite cover must be an element of at most two open intervals in a subcover?

Published on 13 Apr 2026 - 18:06

score 168 · Answer 8 · 2026-04-13 00:49:54

168

Views

Help with a system of inequalities with absolute values

Published on 13 Apr 2026 - 0:49

score 58 · Answer 9 · 2026-04-14 15:24:52

58

Views

Prove that in finite steps you can know if the solution set of linear programming problem is unbounded

Published on 14 Apr 2026 - 15:24

score 4.9k · Answer 10 · 2026-04-13 15:50:49

4.9k

Views

The operator norm of the composition of linear bounded operators between Banach spaces.

Published on 13 Apr 2026 - 15:50

score 33 · Answer 11 · 2026-04-09 21:13:44

33

Views

Error in expression of incomplete zeta function?

Published on 09 Apr 2026 - 21:13

score 218 · Answer 12 · 2026-04-13 23:36:01

218

Views

Confusion on last step of Hardy's proof on the square root of "a rational number with imperfect square component"'s inability to be a rational number

Published on 13 Apr 2026 - 23:36

score 128 · Answer 13 · 2026-04-17 13:45:01

128

Views

Prove that $ { \lim_{n\to\infty} \left( 1-\frac{1}{n} \right)^n = e^{-1} } $.

Published on 17 Apr 2026 - 13:45

score 26 · Answer 14 · 2026-04-15 17:19:37

26

Views

Finitely generated modules over a product of domains, where is finite generation/domain used?

Published on 15 Apr 2026 - 17:19

score 75 · Answer 15 · 2026-04-13 22:08:14

75

Views

If $f\colon\mathbb{Z}\to F$ is an onto morphism and $F$ is a field, then $\mathbb{Z}_p\cong F$ where $p$ is a prime.

Published on 13 Apr 2026 - 22:08

List Question

$f$ is continuous and of bounded variation on $[a,b]$, then $V[a,x]$ is continuous?

Find the largest interval where the Initial Value Problem $y'(t)=t+sin(y(t))$ with $y(2)=1$ has a unique solution. Using Picard-Lindelof Theorem.

How to prove an equivalence of two equations?

Prove $\mathbb{Q}(\zeta)$ is a field when $\zeta$ is algebraic

When does the complete bipartite graph K n,m have an Euler Trail(Path)?

Differentiability of $g(x)\sin(1/x)$ at $x=0$.

An element of a set with a finite cover must be an element of at most two open intervals in a subcover?

Help with a system of inequalities with absolute values

Prove that in finite steps you can know if the solution set of linear programming problem is unbounded

The operator norm of the composition of linear bounded operators between Banach spaces.

Error in expression of incomplete zeta function?

Confusion on last step of Hardy's proof on the square root of "a rational number with imperfect square component"'s inability to be a rational number

Prove that $ { \lim_{n\to\infty} \left( 1-\frac{1}{n} \right)^n = e^{-1} } $.

Finitely generated modules over a product of domains, where is finite generation/domain used?

If $f\colon\mathbb{Z}\to F$ is an onto morphism and $F$ is a field, then $\mathbb{Z}_p\cong F$ where $p$ is a prime.

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