Algebraic categories whose projectives are explicitly free.
Cohomología respecto a una variedad de una categoría.
Constructions over tournaments
We investigate tournaments that are projective in the variety that they generate, and free algebras over partial tournaments in that variety. We prove that the variety determined by three-variable equations of tournaments is not locally finite. We also construct infinitely many finite, pairwise incomparable simple tournaments.
Flatness in varieties of normal bands.
Injectives in varieties of completely simple semigroups.
Injectivity and Boolean Power.
Injectivity in model theory
Nonfree projectives in products of group varieties
On the relationship between projective distributive lattices and Boolean algebras.
On von Neumann varieties.
One-element extensions in the variety generated by tournaments
We investigate congruences in one-element extensions of algebras in the variety generated by tournaments.
О самоинъективных дистрибутивных структурах
Покрытия в скелетах эпиморфности многообразий алгебр