User Dietrich Burde

25 votes

3 answers

2k views

Is the sequence of partition numbers log-concave?

asked Aug 1, 2013 at 15:18

23 votes

3 answers

2k views

Why is $(\mathbb{Z}/3\mathbb{Z})^3$ not a class group of an imaginary quadratic number field ?

asked Jun 5, 2013 at 12:55

22 votes

3 answers

3k views

Are all free groups linear, i.e., admit a faithful representation to GL(n,K) for some field K ?

asked Mar 19, 2013 at 14:15

14 votes

1 answer

1k views

Examples of polynomial rings $A[x]$ with relatively large Krull dimension

asked May 15, 2013 at 9:32

11 votes

1 answer

312 views

Homotopes of simple Lie algebras

asked Aug 27, 2013 at 13:01

9 votes

0 answers

257 views

Good bounds for the number of $n$-dimensional crystallographic groups ?

asked Apr 11, 2013 at 9:24

9 votes

0 answers

613 views

Does Hasse-Minkowski help to produce nontrivial rational solutions?

asked Jan 10, 2014 at 10:08

8 votes

0 answers

407 views

When does the Lloyd polynomial have only integral roots?

asked Jun 25, 2013 at 18:47

7 votes

1 answer

654 views

Existence of a generalized matrix inverse over an arbitrary field?

asked Jun 26, 2013 at 13:10

6 votes

4 answers

596 views

Is the conjugacy problem solvable in $Out(F_n)$?

asked Dec 3, 2013 at 16:39

5 votes

1 answer

324 views

Are all dinilpotent groups solvable, i.e., groups G=AB with nilpotent subgroups A, B ?

asked Mar 20, 2013 at 8:56

5 votes

2 answers

237 views

Are the Gessel sequence integers composite for all $n\ge 3$?

asked Apr 15, 2016 at 15:05

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12 Questions

Is the sequence of partition numbers log-concave?

Why is $(\mathbb{Z}/3\mathbb{Z})^3$ not a class group of an imaginary quadratic number field ?

Are all free groups linear, i.e., admit a faithful representation to GL(n,K) for some field K ?

Examples of polynomial rings $A[x]$ with relatively large Krull dimension

Homotopes of simple Lie algebras

Good bounds for the number of $n$-dimensional crystallographic groups ?

Does Hasse-Minkowski help to produce nontrivial rational solutions?

When does the Lloyd polynomial have only integral roots?

Existence of a generalized matrix inverse over an arbitrary field?

Is the conjugacy problem solvable in $Out(F_n)$?

Are all dinilpotent groups solvable, i.e., groups G=AB with nilpotent subgroups A, B ?

Are the Gessel sequence integers composite for all $n\ge 3$?