A free associative algebra as a free module over a Specht subalgebra.
A generalization of Ulm subgroups
A note on flat modules
A Reduction Theorem for the Primitivity of Tensor Products.
A splitting theorem for ℱ-products
Actions of the additive group on certain noncommutative deformations of the plane
We connect the theorems of Rentschler [rR68] and Dixmier [jD68] on locally nilpotent derivations and automorphisms of the polynomial ring and of the Weyl algebra , both over a field of characteristic zero, by establishing the same type of results for the family of algebras where is an arbitrary polynomial in . In the second part of the paper we consider a field of prime characteristic and study comodule algebra structures on . We also compute the Makar-Limanov invariant of absolute constants...
An embedding theorem for free associative algebras.
Approximation de séries formelles par des séries rationnelles
Arithmetical properties of finite rings and algebras, and analytic number theory. II.
Automorphisms of free nilpotent associative algebras.