1947/01/01 by P. Erdös · 10 citations
Computer Science · Mathematics · #Advanced Graph Theory Research #Graph Labeling and Dimension Problems #Graph theory and applications #Mathematical economics #Mathematics
paper · pdf · doi:10.1090/s0002-9904-1947-08785-1
openalex publication_date 1947/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22
Recently very much more general theorems have been proved by Grnwald and Milgram. 3 They in fact proved (among others) that the condition that G' contains no closed directed path is superfluous.