2 papers
math.CO2026
Cofinality of Regular Tournaments
Omar Hatem, Sara Mohamed, Isabel Müller +1
We show that the class of all finite regular tournaments is cofinal in the class of finite tournaments. In addition, we establish cofinality results for certain special subclasses…
math.GR2025
A Group with Exactly One Noncommutator
Omar Hatem, Daoud Siniora
The question of whether there exists a finite group of order at least three in which every element except one is a commutator has remained unresolved in group theory. In this artic…