User user16924

10 votes

2 answers

3k views

Commutative ring is semisimple iff it's isomorphic to a finite direct product of fields.

asked Nov 7, 2014 at 17:35

8 votes

3 answers

19k views

Number of ways of distributing balls into boxes

asked Sep 18, 2015 at 15:28

8 votes

2 answers

1k views

Lebesgue integral, differentiation under the integral sign

asked Sep 22, 2015 at 1:35

7 votes

1 answer

2k views

Geometric distribution obtained from exponential distribution

asked Oct 16, 2015 at 3:53

7 votes

1 answer

2k views

Left ideals of $M_n(K)$ [duplicate]

asked Sep 13, 2014 at 4:18

6 votes

2 answers

1k views

PID and finitely generated module

asked Nov 14, 2014 at 3:01

6 votes

2 answers

774 views

Egorov's theorem application

asked Sep 11, 2015 at 0:36

5 votes

1 answer

1k views

Version of Lusin's theorem on real line

asked Sep 15, 2015 at 2:46

5 votes

2 answers

2k views

Problem related to the ring $\mathbb Z[\sqrt{d}]$

asked Nov 6, 2014 at 22:14

5 votes

3 answers

1k views

In a Noetherian integral domain, a principal prime ideal can't have proper non-zero prime ideals

asked Dec 1, 2014 at 21:06

5 votes

1 answer

945 views

There are no simple groups of order $27p$

asked Sep 18, 2014 at 1:30

5 votes

2 answers

2k views

Group of order $1575$ problem

asked Sep 27, 2014 at 18:11

5 votes

3 answers

2k views

$\mathbb S_n$ as semidirect product

asked Sep 2, 2014 at 5:14

4 votes

1 answer

153 views

Area and volume relation (multivariable calculus problem)

asked Sep 7, 2014 at 6:44

4 votes

1 answer

412 views

Reducible in $R[X]$ implies reducibility in $(R/I)[X]$

asked Nov 7, 2014 at 4:53

4 votes

2 answers

5k views

Group of order $|G|=pqr$, $p,q,r$ primes has a normal subgroup of order

asked Sep 21, 2014 at 15:13

4 votes

5 answers

207 views

Determine if $\mathbb R[X,Y]/I$ is a field

asked Nov 12, 2014 at 23:44

4 votes

1 answer

230 views

Lebesgue integrable function $g$ equals characteristic function

asked May 13, 2015 at 3:45

3 votes

2 answers

173 views

Sequence of Lebesgue integrals

asked May 1, 2015 at 18:07

3 votes

3 answers

2k views

Group of $2n$ elements, $n$ odd, is not simple

asked May 7, 2015 at 1:34

3 votes

0 answers

1k views

Linear map is diagonalizable iff its adjoint is diagonalizable

asked Aug 26, 2015 at 21:33

3 votes

0 answers

1k views

Probability problem of fishes in a lake

asked Apr 27, 2016 at 5:05

3 votes

1 answer

145 views

Representatives of simple modules

asked Nov 3, 2014 at 4:49

3 votes

2 answers

568 views

Irreducible polynomials in two and four variables

asked Nov 11, 2014 at 1:56

3 votes

3 answers

1k views

Special linear group $SL(2,\mathbb Z_3)$ doesn't have subgroups of order $12$

asked Dec 3, 2014 at 20:59

3 votes

1 answer

1k views

Commutator of $D_{2n}$

asked Dec 5, 2014 at 3:00

3 votes

1 answer

2k views

Convergence in measure of product of convergent sequences [duplicate]

asked Apr 26, 2015 at 23:13

3 votes

2 answers

743 views

Zero divisors of $C[0,1]$ [duplicate]

asked Sep 12, 2014 at 6:28

3 votes

0 answers

777 views

Abelian group action exercise

asked Sep 18, 2014 at 4:24

3 votes

1 answer

600 views

Accumulation point in topological space problem

asked Aug 19, 2014 at 21:37

Stack Exchange Network

123 Questions

Commutative ring is semisimple iff it's isomorphic to a finite direct product of fields.

Number of ways of distributing balls into boxes

Lebesgue integral, differentiation under the integral sign

Geometric distribution obtained from exponential distribution

Left ideals of $M_n(K)$ [duplicate]

PID and finitely generated module

Egorov's theorem application

Version of Lusin's theorem on real line

Problem related to the ring $\mathbb Z[\sqrt{d}]$

In a Noetherian integral domain, a principal prime ideal can't have proper non-zero prime ideals

There are no simple groups of order $27p$

Group of order $1575$ problem

$\mathbb S_n$ as semidirect product

Area and volume relation (multivariable calculus problem)

Reducible in $R[X]$ implies reducibility in $(R/I)[X]$

Group of order $|G|=pqr$, $p,q,r$ primes has a normal subgroup of order

Determine if $\mathbb R[X,Y]/I$ is a field

Lebesgue integrable function $g$ equals characteristic function

Sequence of Lebesgue integrals

Group of $2n$ elements, $n$ odd, is not simple

Linear map is diagonalizable iff its adjoint is diagonalizable

Probability problem of fishes in a lake

Representatives of simple modules

Irreducible polynomials in two and four variables

Special linear group $SL(2,\mathbb Z_3)$ doesn't have subgroups of order $12$

Commutator of $D_{2n}$

Convergence in measure of product of convergent sequences [duplicate]

Zero divisors of $C[0,1]$ [duplicate]

Abelian group action exercise

Accumulation point in topological space problem