2 problems

Let $\mathbb{F}=\mathbb{R}$, and let $n$ nonidentical equi-isoclinic subspaces of dimension $r$ lie in a space of dimension $d$. The real Gerzon bound is…

Let $\mathbb{F}$ be either $\mathbb{R}$ or $\mathbb{C}$, and let $n$ nonidentical equi-isoclinic subspaces of dimension $r$ lie in a space of dimension $d$. For…