Let σ = {σi|i ∈ I} be some partition of the set of all primes P and let G be a finite group. Then G is said to be σ-full if G has a Hall σi-subgroup for all i. A subgroup A of G is said to be σ-permutable in G p...
Let F be a class of group. A subgroup A of a finite group G is said to be K-F-subnormal in G if there is a subgroup chain A = A0 ≤ A1 ≤ · · · ≤ An = G such that either Ai−1 E Ai or Ai/(Ai−1)Ai ∈ F f...
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The subgroups A and B of a group G are called msp-permutable, if the following statements hold: AB is a subgroup of G;the subgroups P and Q are mutually permutable, where P is an arbitrary Sylow p-subgroup of A and Q ...
(µ;ν)-Hankel operators between separable Hilbert spaces were introduced and studied recently (µ-Hankel operators on Hilbert spaces, Opuscula Math., 41 (2021), 881-899). This paper, is devoted to generalizat...
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Let σ = {σi|i ∈ I} be some partition of the set of all primes P, G a finite group and σ(G) = {σi|σi ∩ π(G) 6= ∅}. A set H of subgroups of G is said to be a complete Hall σ-set of G if every member 6= 1 of H i...
Let σ = {σi|i ∈ I} be some partition of the set of all primes and G a finite group. G is said to be σ-soluble if every chief factor H/K of G is a σi-group for some i = i(H/K).A set H of subgroups of G is said to ...
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The paper formulates an algorithm for searching the optimal temperature regime of the catalytic process in an ideal mixing reactor. The problem of optimal control of the catalytic process is formulated in a general fo...
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The paper deals with multidimensional Bochner-Phillips functional calculus. In the previous paper by the author bounded perturbations of Bernstein functions of several commuting semigroup generators on Banach spaces w...
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The websites of the universities of Africa's most populous country Nigeria were examined. The goal was to unearth the reasons why external hyperlinks are placed on these sites and identify any peculiarities by geo...
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