http://hdl.handle.net/123456789/40 Thu, 16 Apr 2026 00:04:28 GMT 2026-04-16T00:04:28Z http://hdl.handle.net/123456789/71 On a group theoretical construction of expanding graphs Ustimenko, Vasyl A. Tue, 05 Aug 2003 00:00:00 GMT http://hdl.handle.net/123456789/71 2003-08-05T00:00:00Z http://hdl.handle.net/123456789/70 On the separability of the restriction functor Theohari-Apostolidi, Th.; Vavatsoulas, H. Thu, 26 Jun 2003 00:00:00 GMT http://hdl.handle.net/123456789/70 2003-06-26T00:00:00Z http://hdl.handle.net/123456789/69 The commutator Hopf Galois extensions Szeto, George; Xue, Lianyong Let H be a finite dimentional Hopf algebra over a field k and H* the dual Hopf algebra of H. Then a commutator right H*-Galois extension B of BH is characterized in terms of the smash product B#H and some relationships between such a B and the Hopf Galois Azumaya or Hopf Galois Hirata extensions are also given. Fri, 28 Mar 2003 00:00:00 GMT http://hdl.handle.net/123456789/69 2003-03-28T00:00:00Z http://hdl.handle.net/123456789/68 H− and R−cross-sections of the full finite semigroup Tn Pyekhtyeryev, Vasyl All H− and R− cross-sections of the full finite semigroup Tn of all transformations of the set N = {1, 2, . . . , n} are described. Tue, 01 Jul 2003 00:00:00 GMT http://hdl.handle.net/123456789/68 2003-07-01T00:00:00Z