Mathematics
Dietrich Burde
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3,389 Answers

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61
If I know the order of every element in a group, do I know the group?
May 24 '15 at 16:22
35
Let $A=(a_{ij})$ be an $n\times n$ matrix. Suppose that $A^2$ is diagonal. Must $A$ be diagonal?
Apr 12 '18 at 11:28
34
Prime numbers the rank of which is also a prime.
Aug 24 '17 at 13:20
32
Complete classification of the groups for which converse of Lagrange's Theorem holds
Feb 14 '17 at 14:48
24
If the field of a vector space weren't characteristic zero, then what would change in the theory?
Jun 30 '17 at 14:22
22
Do commuting matrices share the same eigenvectors?
Apr 9 '15 at 14:47
21
Normal subgroups of dihedral groups
Sep 5 '13 at 12:13
20
Find some digits of $17!$
Feb 28 at 19:12
20
What is the correct spelling of Paul Erdős's name?
Oct 6 '13 at 19:01
20
Show how to calculate the Riemann zeta function for the first non-trivial zero
Sep 11 '13 at 7:48
19
Simple theorems that are instances of deep mathematics
Apr 4 '17 at 18:35
18
Finite groups as subgroups of dihedral groups
Sep 9 '16 at 18:07
18
Would proof of Legendre's conjecture also prove Riemann's hypothesis?
Sep 3 '13 at 8:45
17
How do I make this simple proof better (and more correct?)
Sep 28 '14 at 15:41
16
Is there any perfect squares that are also binomial coefficients?
May 2 '14 at 12:07
14
Largest multiple of $7$ lower than some $78$-digit number?
Mar 18 at 9:33
14
Why is $ (2+\sqrt{3})^n+(2-\sqrt{3})^n$ an integer?
Aug 25 '16 at 10:19
14
Why are the rational numbers not continuous?
Feb 11 '14 at 9:44
13
Does the existence of a mathematical object imply that it is possible to construct the object?
Jun 5 '18 at 11:33
13
Book recomendation for Elliptic-curve cryptography
Dec 19 '17 at 17:32
13
Subgroups of $D_4$
Sep 16 '16 at 15:31
13
Minimize the product of two positive integers $a,b$ that satisfy $2013+ a^2 = b^2$
Oct 13 '14 at 15:16
13
$ABAB=0_{n\times n}$, then must $BABA$ be $0_{n\times n}$?
Jan 5 '14 at 16:49
12
Computing the Galois group of polynomials $x^n-a \in \mathbb{Q}[x]$
Dec 23 '16 at 14:56
12
General term of a sequence.
Jun 1 '18 at 11:54
12
A better way to evaluate a certain determinant
Oct 15 '16 at 9:06
12
How to find a Cartan subalgebra of $so(3)$.
Jul 7 '16 at 9:20
12
What's so special about characteristic 2?
Dec 13 '15 at 9:10
12
Group of an order 385
Sep 1 '15 at 8:15
11
When is the Killing form null?
Dec 18 '13 at 15:46
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