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5 votes

2 answers

1k views

A continuous function on $[0,1]$ that is not of a bounded veriation

asked Nov 25, 2018 at 22:24

4 votes

2 answers

1k views

Question about Vitali Covering

asked Nov 11, 2018 at 22:42

4 votes

1 answer

51 views

Example of a linear operator has no continuous inverse [closed]

asked Nov 12, 2019 at 2:14

3 votes

3 answers

308 views

If the operator $T$ is defined by $Tf(x)=\int_0^xf(t)\,dt$, show that $Tf \in C[0,1]$

asked Nov 26, 2019 at 15:49

3 votes

1 answer

116 views

An increasing function on [0,1] that is not continuous with increasing subsequence

asked May 27, 2021 at 7:10

3 votes

2 answers

555 views

The unit interval homeomorphic to the unit circle

asked Feb 6, 2021 at 17:07

3 votes

1 answer

525 views

Question in Volterra operator

asked Apr 25, 2019 at 15:22

3 votes

2 answers

1k views

Co-countable set and a countable set

asked Sep 19, 2018 at 21:21

3 votes

2 answers

413 views

Question about normal subgroup

asked Sep 15, 2019 at 22:20

3 votes

1 answer

78 views

Summation of uncountable set [closed]

asked Oct 31, 2017 at 23:24

2 votes

5 answers

4k views

proving $(x^n)$ diverges for $x>1$

asked Sep 21, 2017 at 3:54

2 votes

2 answers

260 views

Showing the series of real decimal is convergent

asked Oct 7, 2017 at 19:10

2 votes

1 answer

74 views

What is an example of an algebraic number of second order?

asked Feb 21, 2018 at 15:48

2 votes

1 answer

385 views

Question about compact set with a function attains its extreme values

asked Feb 23, 2018 at 21:20

2 votes

1 answer

88 views

Proving that the analytic function defined by the sum goes to infinity for all the rational

asked Mar 26, 2018 at 0:20

2 votes

1 answer

49 views

Proving a series goes to infinity

asked Mar 29, 2018 at 6:10

2 votes

1 answer

234 views

The definition of Sobolev spaces

asked May 28, 2018 at 17:19

2 votes

0 answers

50 views

Proving a continuity of functions in C[0,1]

asked Sep 16, 2019 at 1:56

2 votes

2 answers

61 views

Example of a strange metric space

asked Sep 20, 2019 at 4:31

2 votes

2 answers

43 views

Proving the convergence of a bounded sequence in R

asked Oct 18, 2019 at 17:10

2 votes

2 answers

723 views

An isomorphism between fields of fractions

asked Nov 7, 2019 at 4:12

2 votes

1 answer

424 views

A sequence of measurable function and a set points such that this sequence converge

asked Sep 27, 2018 at 9:13

2 votes

0 answers

52 views

Proving an increasing of a continuous function

asked Nov 12, 2018 at 21:09

2 votes

1 answer

25 views

Infininty norm and 1-norm on a matrix

asked Nov 22, 2022 at 16:41

2 votes

2 answers

79 views

Find a nonabelian subgroup $T$ of $S_3 \times \Bbb Z_4$ of index $2$, generated by elements $x,y$ such that $|x|=6$, $x^3=y^2$, and $yx=x^{-1}y$.

asked Nov 24, 2019 at 21:14

2 votes

2 answers

756 views

field extension that is finitely generated but not finite dimensional

asked Dec 4, 2019 at 4:49

2 votes

3 answers

182 views

A solution for nonlinear system of ode

asked Mar 31, 2020 at 2:51

2 votes

0 answers

90 views

Prey predator model via polar coordinate

asked Apr 21, 2020 at 16:05

1 vote

1 answer

204 views

Showing a periodic orbit for a system

asked Apr 28, 2020 at 1:31

1 vote

2 answers

177 views

Image of limit point compact Hausdorff space is a compact?

asked May 16, 2020 at 5:07

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120 Questions

A continuous function on $[0,1]$ that is not of a bounded veriation

Question about Vitali Covering

Example of a linear operator has no continuous inverse [closed]

If the operator $T$ is defined by $Tf(x)=\int_0^xf(t)\,dt$, show that $Tf \in C[0,1]$

An increasing function on [0,1] that is not continuous with increasing subsequence

The unit interval homeomorphic to the unit circle

Question in Volterra operator

Co-countable set and a countable set

Question about normal subgroup

Summation of uncountable set [closed]

proving $(x^n)$ diverges for $x>1$

Showing the series of real decimal is convergent

What is an example of an algebraic number of second order?

Question about compact set with a function attains its extreme values

Proving that the analytic function defined by the sum goes to infinity for all the rational

Proving a series goes to infinity

The definition of Sobolev spaces

Proving a continuity of functions in C[0,1]

Example of a strange metric space

Proving the convergence of a bounded sequence in R

An isomorphism between fields of fractions

A sequence of measurable function and a set points such that this sequence converge

Proving an increasing of a continuous function

Infininty norm and 1-norm on a matrix

Find a nonabelian subgroup $T$ of $S_3 \times \Bbb Z_4$ of index $2$, generated by elements $x,y$ such that $|x|=6$, $x^3=y^2$, and $yx=x^{-1}y$.

field extension that is finitely generated but not finite dimensional

A solution for nonlinear system of ode

Prey predator model via polar coordinate

Showing a periodic orbit for a system

Image of limit point compact Hausdorff space is a compact?