A Loomis-Sikorski theorem for logics
Completeness and modular cross-symmetry in normed linear spaces
Ideals, congruences and annihilators on nearlattices
By a nearlattice is meant a join-semilattice having the property that every principal filter is a lattice with respect to the semilattice order. We introduce the concept of (relative) annihilator of a nearlattice and characterize some properties like distributivity, modularity or -distributivity of nearlattices by means of certain properties of annihilators.
Strong compact elements in multiplicative lattices
The sums of closed subspaces in a topological linear space
Triple construction of semilattices with admitting neutral -closure operators
Varieties with modular and distributive lattices of symmetric or reflexive relations
Структура гиперинвариантных подпространств вещественного конечномерного оператора