2 problems

Let $t,p,q,n$ be non-negative integers. Call $(t,p,q,n)$ admissible if there exist $\mathcal{S}\in\operatorname{Gr}^{\mathbb{F}}(p,n)$ and…

Let $\mathbb{F}$ be either $\mathbb{R}$ or $\mathbb{C}$. For $b\in\mathbb{F}^n$ and an integer $t$ with $0\leq t\leq \textbf{Ind}_{A}(\mathcal{S})$, consider the sets … For…