On a simplicial complex associated with tilting modules.
On a theorem of P. E. Schupp. (Sur un théorème de P. E. Schupp.)
On algebras of strongly unbounded representation type.
On endomorphisms and quasi-endomorphisms of torsionfree groups
On finiteness of rings with finite maximal subrings.
On generalized quaternion algebras.
On indecomposable representations of quivers with zero-relations
On Kolchin's theorem.
A well-known theorem due to Kolchin states that a semi-group G of unipotent matrices over a field F can be brought to a triangular form over the field F [4, Theorem H]. Recall that a matrix A is called unipotent if its only eigenvalue is 1, or, equivalently, if the matrix I - A is nilpotent.Many years ago I noticed that this result of Kolchin is an immediate consequence of a too-little known result due to Wedderburn [6]. This result of Wedderburn asserts that if B is a finite dimensional algebra...
On L-ideal-based L-zero-divisor graphs
In a manner analogous to a commutative ring, the L-ideal-based L-zero-divisor graph of a commutative ring R can be defined as the undirected graph Γ(μ) for some L-ideal μ of R. The basic properties and possible structures of the graph Γ(μ) are studied.
On Multiplicative Bases in Quasi Frobenius Algebras.
On nonexistence of oriented cycles in Auslander-Reiten quivers
On orders in rQF-2 rings.
On periodic rings.
On pure semi-simple Grothendieck categories I
On pure semi-simple Grothendieck categories II
On quotient rings
On rings with zero divisors. Strong -groups
On selfinjective algebras of Euclidean type
On some commutativity theorems for finite rings and finite groups
On subdirect decomposition and varieties of some rings with involution. II.