2 problems

Classification conjecture. Then $d=2,3,6,7,23$, and $\Omega$ is isometric to the corresponding example found in the examples section.

Let $\Omega$ be a set of $d(d+1)/2$ equiangular lines in $\mathbf{R}^d$. Here $\operatorname{Inc}(\Omega)$ denotes the maximum size of an incoherent subset of $\Omega$. Absolute-bo…