On a conjecture of M. E. Watkins on graphical regular representations of finite groups
On a Theorem of Livingstone and Wagner.
On automorphism groups of boolean algebras
On automorphism groups of planar lattices
The structure of automorphisms of planar lattices is analyzed.
On automorphisms of algebras with a single unary operation
On Certain Classes of rigid groups
On chirality groups and regular coverings of regular oriented hypermaps
We prove that if the Walsh bipartite map of a regular oriented hypermap is also orientably regular then both and have the same chirality group, the covering core of (the smallest regular map covering ) is the Walsh bipartite map of the covering core of and the closure cover of (the greatest regular map covered by ) is the Walsh bipartite map of the closure cover of . We apply these results to the family of toroidal chiral hypermaps induced by the family of toroidal bipartite maps...
On double coverings of some rotary hypermaps.
On finite loops whose inner mapping groups have small orders
We investigate the situation that the inner mapping group of a loop is of order which is a product of two small prime numbers and we show that then the loop is soluble.
On Graphical Regular Representations of Direct Products of Groups.
On Groups with Several Doubly-Transitive Permuation Representations.
On Projective Planes of Type (5, m).
On soluble groups of automorphisms of nonorientable Klein surfaces
We classify up to topological type nonorientable bordered Klein surfaces with maximal symmetry and soluble automorphism group provided its solubility degree does not exceed 4. Using this classification we show that a soluble group of automorphisms of a nonorientable Riemann surface of algebraic genus q ≥ 2 has at most 24(q-1) elements and that this bound is sharp for infinitely many values of q.
On some flag-transitive non-classical -geometries. II.
On supersoluble groups acting on Klein surfaces.
On Symmetric and Antisymmetric Relations.
On the automorphism group of Solomon's descent algebra.
On the Automorphism Groups of Denumerable Boolean Algebras.
On the Collineation Groups of Derived Semifield Planes.
On the computation of resolvents and Galois groups.