3 problems

Let $M$ be a standard sequence, for example $M\in\mathcal{LC}$, and let $D$ be its dual sequence. The notions of standard sequence, dual sequence, and the properties “nice”, “large…

Let $\mathbb{M}$ be a weight sequence, and let (i), (ii), and (iii) denote the first three conditions in Theorem, concerning the existence of extension operators in the associated…

Let $\mathbb{M}$ be a weight sequence, and let $S_{\{\widehat{\mathbb{M}\}}}$, $\widetilde{S}^u_{\{\mathbb{M}\}}$, and $\widetilde{S}_{\{\mathbb{M}\}}$ denote the corresponding sur…