2 problems

Let $n\in\mathbb{N}$ and $0\leqslant k\leqslant n-1$, and let $A^2_{n,k}(x)$ denote the squared norm of the derivative-evaluation functional on the closed interval under considerat…

Let $n\in\mathbb{N}$, let $k\in\{0,1,\ldots,n-1\}$, and let $A_{n,k}(x)$ be the norm of the evaluation functional $f\mapsto f^{(k)}(x)$ on the Sobolev space of functions satisfying…