Algebra and discrete mathematics - № 1 - 2002http://hdl.handle.net/123456789/272019-04-25T22:35:45Z2019-04-25T22:35:45ZMetrizable ball structuresProtasov, I.V.http://hdl.handle.net/123456789/362015-10-16T11:35:54Z2002-09-24T00:00:00ZMetrizable ball structures
Protasov, I.V.
A ball structure is a triple (X, P,B), where X, P
are nonempty sets and, for any x ∈ X, α ∈ P, B(x, α) is a subset
of X, x ∈ B(x, α), which is called a ball of radius α around x. We
characterize up to isomorphism the ball structures related to the
metric spaces of different types and groups.
2002-09-24T00:00:00ZVirtual endomorphisms of groupsNekrashevych, Volodymyrhttp://hdl.handle.net/123456789/352015-10-16T11:35:37Z2002-10-21T00:00:00ZVirtual endomorphisms of groups
Nekrashevych, Volodymyr
2002-10-21T00:00:00ZOn the finite state automorphism group of a rooted treeLavrenyuk, Yaroslavhttp://hdl.handle.net/123456789/342015-10-16T11:36:10Z2002-09-23T00:00:00ZOn the finite state automorphism group of a rooted tree
Lavrenyuk, Yaroslav
The normalizer of the finite state automorphism
group of a rooted homogeneous tree in the full automorphism group
of this tree was investigated. General form of elements in the nor-
malizer was obtained and countability of the normalizer was proved.
2002-09-23T00:00:00ZRadical theory in BCH-algebrasDudek, W. A.Jun, Y. B.http://hdl.handle.net/123456789/332015-10-16T11:35:52Z2002-05-10T00:00:00ZRadical theory in BCH-algebras
Dudek, W. A.; Jun, Y. B.
2002-05-10T00:00:00Z