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Tom De Medts

Ghent, Belgium

https://algebra.ugent.be/~tdemedts

I am a professor at Ghent University (Belgium). My main research interest is the study of (not necessarily associative) algebras and their connections with other areas, such as group theory and incidence geometry.

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Top Questions
37 votes

Order-increasing bijection from arbitrary groups to cyclic groups

gr.group-theory finite-groups asked Aug 7, 2012 at 9:03
mathoverflow.net

24 votes

Nilpotency of a group by looking at orders of elements

gr.group-theory finite-groups nilpotent-groups asked Feb 10, 2011 at 20:02
mathoverflow.net

18 votes

For which rings $R$ is $\mathrm{SL}_n(R)$ generated by transvections?

gr.group-theory ra.rings-and-algebras algebraic-k-theory asked Mar 28, 2011 at 19:18
mathoverflow.net

15 votes

Connectedness of the linear algebraic group SO_n

ag.algebraic-geometry algebraic-groups classical-groups asked Jun 5, 2012 at 15:07
mathoverflow.net

13 votes

Groups with triple system of self-normalizing subgroups

gr.group-theory asked Jun 24, 2011 at 8:41
mathoverflow.net

12 votes

Divisibility and factorization in rings that are not integral domains

ra.rings-and-algebras factorization commutative-rings asked Jul 11, 2012 at 20:12
mathoverflow.net

12 votes

Non-isomorphic two-transitive permutation groups with isomorphic point stabilizers

gr.group-theory finite-groups topological-groups asked Feb 16, 2011 at 10:16
mathoverflow.net

9 votes

Embedding $\mathrm{PGL}(n,q^h)$ in $\mathrm{PGL}(nh,q)$

gr.group-theory finite-groups projective-geometry asked Apr 28, 2015 at 14:30
mathoverflow.net

7 votes

Recovering n from sigma(n)/n

nt.number-theory computational-number-theo prime-numbers asked Feb 23, 2011 at 9:56
mathoverflow.net

6 votes

Group homomorphism from $\mathrm{GL}_p$ to $\mathrm{SL}_p$ in characteristic $p$

reference-request gr.group-theory rt.representation-theory terminology frobenius-map asked Jun 23, 2023 at 13:59
mathoverflow.net

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Top Answers
24
Order of product of group elements
mathoverflow.net

16
vector to diagonal matrix
mathoverflow.net

15
About solvable groups
mathoverflow.net

15
The mysterious significance of local subgroups in finite group theory
mathoverflow.net

13
Constructing $E_8$ from its branching to $A_8$
mathoverflow.net

12
Subgroups of groups of Square-free order
mathoverflow.net

12
For which rings $R$ is $\mathrm{SL}_n(R)$ generated by transvections?
mathoverflow.net

12
Simplest examples of rings that are not isomorphic to their opposites
mathoverflow.net

12
Applications of Jordan algebras
mathoverflow.net

11
rational function identity
mathoverflow.net

11
Automorphisms of non-abelian groups of order$ p^3$
mathoverflow.net

11
What are the automorphisms of finite commutative groups？
math.stackexchange.com

10
Which finite projective planes can have a symmetric incidence matrix?
mathoverflow.net

10
What are the automorphisms of finite commutative groups？
mathoverflow.net

9
Spherical building of an exceptional group of Lie type
mathoverflow.net

9
Groups of exponent 4
mathoverflow.net

9
Question about some element in a group commutes with its all conjuagates.
mathoverflow.net

9
What is the automorphism group of this geometry?
mathoverflow.net

8
Automorphism Group of some Classical groups
mathoverflow.net

8
quadratic forms over fields of characteristic 2
mathoverflow.net

8
Understanding how to construct Bruhat-Tits buildings for non-split groups by Galois descent
mathoverflow.net

7
Cyclic subgroups of finite abelian groups
mathoverflow.net

7
How many permutations for each sum of digits of a number of length l? (solved but asking for insight)
mathoverflow.net

7
How to prove that a quaternion algebra over ℤₚ is isomorphic to Mat₂(ℤₚ) for p prime?
mathoverflow.net

7
An algebra map between Hopf algebras that does not commute with the counit
mathoverflow.net

6
Cayley-Dickson form of a quaternion
mathoverflow.net

6
Conjecture on prime numbers
mathoverflow.net

6
Synthetic projective lines
mathoverflow.net

6
Gcd of polynomials over a finite field
mathoverflow.net

6
Chirality of octonion algebras
mathoverflow.net

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