It is proved that there are no regularizing boundary-value problem for pseudo-symmetric elliptic systems of four equations of the first order in R^4.

A subgroup H of a finite group G is said to be wide if each prime divisor of the order G divides the order H. We obtain the description of finite π-soluble groups with no wide maximal subgroups with π-number indices. We ...

We establish the structure of finite groups with F-subnormal or self-normalizing primary cyclic subgroups in case F is a subgroup-closed saturated superradical formation containing all nilpotent groups.

A subgroup A of a group G is called seminormal in G, if there exists a subgroup B such that G = AB and AX is a subgroup of G for every subgroup X of B. We introduce the new concept that unites subnormality and seminormality. A ...

Let H be a non-normal maximal subgroup of a finite solvable group G, and let q ∈ π(F (H/CoreGH)). It is proved that G has a Sylow q-subgroup Q such that NG(Q) ⊆ H.

This long-term field trial aimed at remediating a Cu-contaminated soil to promote crop production and soil functions at a former wood preservation site. Twenty-eight field plots with total topsoil Cu in the 198–1,169 mg ...

The article reveals the essence of the concept “methodological strategy of pedagogical research”, focuses attention on the potential of polyparadigmin pedagogical research, the alternative of scientific ideals, methodological ...