2 problems

Let $\mathcal{C}$ be a sum-closed permutation class, and let $\mathcal{C}^{\not\oplus}$ denote its indecomposable permutations. Linear indecomposable-count conjecture. If the seque…

Let $\mathcal{C}$ be a sum-closed permutation class, and let $\mathcal{C}^{\not\oplus}$ denote its indecomposable permutations. Define $\tau$ to be the unique positive root of … so…