Parastrophically Equivalent Quasigroup Equations
Partial line graph operator and half-arc-transitive group actions
Percolation on nonamenable products at the uniqueness threshold
Perfect Codes in Antipodal Distance-Transitive Graphs.
Polarities of G. Higman's symmetric design and a strongly regular graph on 176 vertices.
Prime graph components of finite almost simple groups
Problemas aditivos y grafos de Cayley.
Properties of digraphs connected with some congruence relations
The paper extends the results given by M. Křížek and L. Somer, On a connection of number theory with graph theory, Czech. Math. J. 54 (129) (2004), 465–485 (see [5]). For each positive integer define a digraph whose set of vertices is the set and for which there is a directed edge from to if The properties of such digraphs are considered. The necessary and the sufficient condition for the symmetry of a digraph is proved. The formula for the number of fixed points of is established....
Propriétés des diagrammes de Cayley
Průměr grafu pologrupy
Průměr grafu systému vlastních podpologrup komutativní pologrupy