2 problems

Addition-chain defect order-type conjecture. For each whole number $k$, the set $\mathscr{D}^{\ell}\cap[0,k]$ has order type $\omega^k$. This conjecture concerns the fine structure…

Let $(S, \mathbin{*})$ be a left-cancellative LD-system, let $B_n$ be the braid group on $n$ strands, and let…