Sobolev Institute of Mathematics

Russian Academy of Sciences Siberian Branch

Novosibirsk 630090, Russia

E-mail:

Russian Academy of Sciences Siberian Branch

Novosibirsk 630090, Russia

E-mail:

- Vladimir A. Andrunachievici (1917 - 1997)
**Early History of the Theory of Rings in Novosibirsk**- Pretorsions in modules and associated closure operators
- Properties of accessible subrings of pseudonormed rings when taking quotient rings
- Radicals and generalizations of derivations
- Some examples of topological modules
- Unrefinable chains when taking the infimum in the lattice of ring topologies for a nilpotent ring
- On the inverse operations in the class of preradicals of a module category, II
- On LCA groups whose ring of continuous endomorphisms satisfies DCC on closed ideals
- The Lyapunov quantities and the center conditions for a class of bidimensional polynomial systems of differential equations with nonlinearities of the fourth degree