second neighborhood problem

unsolved problem about oriented graphs

en-US/ˈsɛkənd ˈneɪbɚˌhʊd ˈpɹɑbləm/
en-GB/sɪˈkɒnd ˈneɪbəˌhʊd ˈpɹɒbləm/

Катэгорыі:

conjecture