2 problems

0 votes0 replies0 views
He–Ma–Yang conjecture on the extremal number of the 4-cycle
He–Ma–Yang conjecture.
Conjectureopencycles extremal-graph-theory extremal-numbersarXiv posted 2 days ago
0 votes0 replies0 views
Erd s–Simonovits even-cycle extremal-number conjecture
Let $\ell\geqslant2$ , and write … for the maximum number of edges in an $n$ -vertex graph containing none of the cycles $C_3,C_4,\ldots,C_{2\ell}$ . Erd s–Simonovits conjecture. … Th…
Conjectureopeneven-cycles extremal-graph-theory extremal-numbersarXiv posted 2 days ago

He–Ma–Yang conjecture on the extremal number of the 4-cycle