2 problems

Let $S_{N,r}$ be the index set used to define the coefficient space $\mathbb{P}_{N,r}$, let $\mathbf{W}_{N,r}\subseteq\mathbb{P}_{N,r}$ be the space of polynomials satisfying the s…

Let $C_{N,r}$ be the matrices defined from the matrices $E^{(i)}_{N,r}$, and let $\mathbb{O}(x)$ and $\mathbb{S}(x)$ denote the generating series appearing in the source. Brown's m…