A New Upper Bound for the Turán Density of the Tetrahedron

Gyeongwon Jeong, Seonghun Park, Seonghyuk Im +2

We prove that the Turán density of the tetrahedron $K_4^{(3)}$ satisfies $\pi (K_4^{(3)})\le 14993367693127837/26880000000000000<0.557789$, improving Baber's upper bound of $0.5615…