Cybernetics and Systems Analysis / Issue (2019, 55 (2))
Kryvtsun O.V.
Representation of fragmentary structures by oriented graphs This paper investigates properties of fragmentary structures and establishes a relation between them and marked acyclic digraphs with one source and also a correspondence between classes of isomorphic fragmentary structures and unmarked acyclic digraphs of certain type, which are called feasible graphs. The concepts of a dimension of a feasible graph and its corresponding isomorphic fragmentary structures are defined. An expression is obtained for the lower-bound estimate of a dimension. A theorem on properties of feasible graphs is proved. The numbers of fragmentary structures and classes of isomorphic fragmentary structures of small dimensions are counted. © 2019, Springer Science+Business Media, LLC, part of Springer Nature. Keywords: directed acyclic graph, fragmentary structure, hypercube, partially ordered set, Directed graphs, Set theory, Acyclic digraph, Directed acyclic graph (DAG), Hypercube, Lower bounds, Oriented graph, Partially ordered set, Graph theory
Cite: Kryvtsun O.V.
(2019). Representation of fragmentary structures by oriented graphs. Cybernetics and Systems Analysis, 55 (2), 163-170. doi: https://doi.org/10.1007/s10559-019-00136-5 http://jnas.nbuv.gov.ua/article/UJRN-0000968706 [In Ukrainian]. |