2 papers
math.NT2023
When is the ring of integers of a number field coverable?
Mohamed Ayad, Omar Kihel
A commutative ring R is said to be coverable if it is the union of its proper subrings and said to be finitely coverable if it is the union of a finite number of them. In the latte…
math.NT2021
The paradox of the infinity
Mohamed Ayad, Omar Kihel
\textit{Let be an infinite set on which a property is defined. Suppose that is a partition, where each is infinite. Suppose also that, in…