On the union of matching matroids
On tree-complete graphs
On two graph-theoretical problems from the conference at Nová Ves u Branžeže
On two problems of the graph theory
On varieties of graphs
In this paper, we introduce the notion of a variety of graphs closed under isomorphic images, subgraph identifications and induced subgraphs (induced connected subgraphs) firstly and next closed under isomorphic images, subgraph identifications, circuits and cliques. The structure of the corresponding lattices is investigated.
On weak direct product decompositions of lattices and graphs
Ordres "C.A.C."
Orientations of graphs minimizing the radius or the diameter
Partially directed Moore graphs
Partitions of Graphs into Coverings and Hypergraphs into Transversals
Partitions of vertices
Partitionstheoreme für Graphen.
Paths in powers of graph
Perfect codes and two-graphs
Perfect codes in graphs and their Cartesian powers [Abstract of thesis]
Perfect codes in regular graphs
Placing bipartite graphs of small size II
In this paper we give all pairs of non mutually placeable (p,q)-bipartite graphs G and H such that 2 ≤ p ≤ q, e(H) ≤ p and e(G)+e(H) ≤ 2p+q-1.
Planar permutation graphs of paths
Poincaré and graph theory
Polar graphs and railway traffic