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JOURNALS // Itogi Nauki i Tekhniki. Sovremennaya Matematika i ee Prilozheniya. Tematicheskie Obzory // Archive

2020, Volume 177

| General information | Contents |


Algebra


On nilpotent power $MR$-groups
M. G. Amaglobeli, T. Bokelavadze
3
Geodesic vectors and flat totally geodesic subalgebras in nilpotent metric Lie algebras
A. Al-Abayechi, Á. Figula
10
On the number of Heisenberg characters of finite groups
A. Zolfi, A. R. Ashrafi
24
Projective geometries over lattices and their morphisms
T. Bokelavadze, T. G. Kvirikashvili
34
Generating sets of the complete semigroup of binary relations defined by semilattices of the class $\Sigma_1(X,6)$
Ya. Diasamidze, G. Partenadze, G. Tavdgiridze
39
On three point charges on a flexible arc
G. Giorgadze, G. N. Khimshiashvili
63
Irreducible generating sets of complete semigroups of unions $B_X(S)$ defined by semilattices of the class $\Sigma_1(X,4)$
O. Givradze
69
On the sum of orders of elements in finite groups
M. Herzog, P. Longobardi, M. Maj
74
On one-way ring homomorphisms
N. Inassaridze, M. Khazaradze, È. V. Khmaladze, B. Mesablishvili
80
$A(\infty)$-algebra structure in the cohomology and cohomologies of a free loop space
T. V. Kadeishvili
87
The lattice of fully invariant subgroups of a cotorsion hull
T. G. Kemoklidze
97
Groups with finitely many isomorphic classes of relevant subgroups
L. A. Kurdachenko, P. Longobardi, M. Maj
102
On products in algebraic $K$-theory of crossed Hopf algebras
G. G. Rakviashvili
111
Wielandt subgroups of certain finite groups
H. B. Shelash, A. R. Ashrafi
121
Enumeration of labeled series-parallel tricyclic graphs
V. A. Voblyi
132


© Steklov Math. Inst. of RAS, 2025