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- Institut für Nichtklassische ChemieDE6 papers
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4 papers · 1 filter
The cyclic subgroup separability of certain generalized free products of two groups
P. A. Bobrovskii, E. V. Sokolov
Free products of two residually finite groups with amalgamated retracts are considered. It is proved that a cyclic subgroup of such a group is not finitely separable if, and only i…
On the cyclic subgroup separability of the free product of two groups with commuting subgroups
E. V. Sokolov
Let G be the free product of groups A and B with commuting subgroups H \leqslant A and K \leqslant B, and let C be the class of all finite groups or the class of all finite p-group…
A characterization of root classes of groups
E. V. Sokolov
A class of groups C is root in a sense of K. W. Gruenberg if it is closed under taking subgroups and satisfies the Gruenberg condition: for any group X and for any subnormal sequen…
Englert-type solutions of d=11 supergravity
E. K. Loginov
A family of geometries on S^7 arise as solutions of the classical equations of motion in 11 dimensions. In addition to the conventional riemannian geometry and the two exceptional…