Four new operations are introduced and studied in the class of preradicals PR in modules, namely, the inverse operations of the product and of the coproduct with respect to meet and to join.

We have shown previously some examples when finitere gular lenspolytopes can be obtained from infinite equidistant regular polytopesin Lobachevski spaces, and that these regular lens polytopes can be used to obtain new ...

The families of subspaces of spaces are considered, more precisely families that have bases of countable order. The results obtained for a spaces with such families are applied in selection theorems.

This talk is dedicated to studying the problem of asymptotic behaviour of trajectories of linear dynamical systems.

In the subcategory C2V, of topological vector locally convex spaces Hausdorff, Rc is the lattice of subcategories c-reflective.

În cele ceurmeaza, vreau sa-mi exprim”Un cuvânt din inimă şi gând”- simplu spus mulţumiri tuturor şi oexpunere acelor ce s-au întâmplat în vremurile trecutului.

Unele probleme de geometrie sunt mai dificile în rezolvare prin metode tradiţionale (problemele de asemanare,unele relaţii metrice etc.). Ele pot fi soluţionate cu ajutorul unor noţiuni din fizică: regula pârghiei, centrul ...

Este cunoscut însă faptul că tinerii manifestă un interes scăzut pentru studierea disciplinelor din domeniul şinţelor reale şi ale naturii, fapt ce duce la o lipsă acută de cadre calificate atât în domeniul educaţiei, cât ...

One of my first attempts when I start the ODE course(and later, the PDE course) is to try to persuade my students on how important are for science and technology the mathematical models builded by means of differential equations.

Objects of topological algebra, defined as a certain combination of algebraic and topological structures, often give rise to original and unusual questions. A special additional topological property of many topological ...