Document Zbl 0569.05022

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Some new good characterizations for directed graphs. (English) Zbl 0569.05022

Čas. Pěst. Mat. 109, 348-354 (1984).

The author solves the problem [J. Nešetříl and A. Pultr, Discrete Math. 22, 287-300 (1978; Zbl 0388.05039)] of the existence of nontrivial good characterizations in the class of all digraphs by finding an infinite number of examples of good characterizations (nonexistence of a homomorphism from some fixed graph and existence of a homomorphism to some fixed graph).

Reviewer: G.Chaty

Cited in 9 Documents

MSC:

05C20

Directed graphs (digraphs), tournaments

Keywords:

digraphs; characterizations; homomorphism

Citations:

Zbl 0388.05039

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Full Text: DOI EuDML