User Markus Punnar

13 votes

4 answers

923 views

Series convergence without sigma notation

asked Dec 12, 2018 at 21:34

5 votes

5 answers

9k views

How to calculate the determinant of this n by n matrix?

asked Sep 9, 2017 at 19:49

4 votes

2 answers

1k views

Find all subgroups of $(U(Z_{15}),*).$

asked Mar 26, 2019 at 12:47

3 votes

3 answers

3k views

Prove that integral equals zero

asked Nov 14, 2017 at 10:50

2 votes

3 answers

7k views

Prove that if 2 divides n and 7 divides n, then 14 divides n

asked Oct 17, 2017 at 17:13

2 votes

1 answer

50 views

Question about series convergence or divergence

asked Dec 11, 2018 at 19:26

2 votes

2 answers

60 views

Need help confirming which algebraic structure this is

asked Mar 14, 2019 at 6:07

1 vote

1 answer

50 views

Prime inequality - why does this work?

asked Mar 11, 2019 at 14:10

1 vote

1 answer

130 views

Find the area between three curves

asked Nov 19, 2017 at 15:09

1 vote

2 answers

270 views

Find values of $b$ so that infinite series converges

asked Mar 7, 2018 at 19:30

1 vote

2 answers

681 views

Nth root of a being greater than 1 when a is greater than 1

asked Oct 20, 2018 at 11:05

1 vote

1 answer

36 views

Inequality proof as a part of induction

asked Oct 25, 2018 at 14:18

1 vote

2 answers

166 views

Limit as a Riemann sum

asked Nov 27, 2018 at 17:55

1 vote

1 answer

165 views

Winning strategy in a number theory game

asked Mar 31, 2019 at 15:29

1 vote

1 answer

176 views

Find the Laurent series of function

asked Oct 31, 2019 at 8:33

1 vote

0 answers

49 views

Find radius of convergence without finding series

asked Oct 31, 2019 at 16:45

1 vote

2 answers

177 views

Integral over the real axis using residues

asked Nov 13, 2019 at 12:45

1 vote

3 answers

334 views

When is the square of the module of an analytic function harmonic?

asked Dec 3, 2019 at 18:32

0 votes

1 answer

785 views

Conformal map from complex plane with a cut-out to unit disc with two given values

asked Dec 4, 2019 at 21:50

0 votes

1 answer

1k views

Finding a complex integral with a triangular line three ways

asked Oct 7, 2019 at 21:29

0 votes

0 answers

23 views

Find the volume with an integral

asked Nov 20, 2017 at 18:53

0 votes

2 answers

435 views

Missing coordinates of a parallelogram

asked Dec 5, 2017 at 20:05

0 votes

0 answers

22 views

Create a bijection between half-open and open interval [duplicate]

asked Dec 12, 2017 at 17:41

0 votes

6 answers

137 views

If $\gcd(n,18)=3$ then $\gcd(n^2,18)=9$

asked Feb 24, 2019 at 20:41

0 votes

1 answer

216 views

Composite numbers with at most one prime factor less than root of it

asked Mar 3, 2019 at 14:29

0 votes

0 answers

163 views

$\det(A+I)=1+\text{tr}(A)$, if $\text{rank}(A)=1$ proof? [duplicate]

asked Sep 16, 2017 at 17:03

Stack Exchange Network

26 Questions

Series convergence without sigma notation

How to calculate the determinant of this n by n matrix?

Find all subgroups of $(U(Z_{15}),*).$

Prove that integral equals zero

Prove that if 2 divides n and 7 divides n, then 14 divides n

Question about series convergence or divergence

Need help confirming which algebraic structure this is

Prime inequality - why does this work?

Find the area between three curves

Find values of $b$ so that infinite series converges

Nth root of a being greater than 1 when a is greater than 1

Inequality proof as a part of induction

Limit as a Riemann sum

Winning strategy in a number theory game

Find the Laurent series of function

Find radius of convergence without finding series

Integral over the real axis using residues

When is the square of the module of an analytic function harmonic?

Conformal map from complex plane with a cut-out to unit disc with two given values

Finding a complex integral with a triangular line three ways

Find the volume with an integral

Missing coordinates of a parallelogram

Create a bijection between half-open and open interval [duplicate]

If $\gcd(n,18)=3$ then $\gcd(n^2,18)=9$

Composite numbers with at most one prime factor less than root of it

$\det(A+I)=1+\text{tr}(A)$, if $\text{rank}(A)=1$ proof? [duplicate]