Rational codegree Turán density of hypergraphsJan 2, 2026·Jun Gao,Oleg PikhurkoMingyuan Rong,Shumin Sun· 0 min read PDF arXivAbstractWe show that the set of codegree Turán densities of finite families contains all rational numbers and answer a question of Mubayi and Zhao regarding non-principality.TypePreprintLast updated on Jan 2, 2026Codegree Density AuthorsMingyuan RongPh.D. StudentThe codegree Turán density of tight cycles Dec 28, 2025 →