3 problems

Let $\ddot{X}_n$ be a double affine Coxeter diagram with finite nodes labelled $1,\ldots,n$. Let $B(X_n)$ be the Artin group of the finite subdiagram, and let $\mho$ and…

Let $\dddot{X}_n$ be a double affine Coxeter diagram, let $B(X_n)$ be the Artin group associated to its finite subdiagram, and let $\mho_{01}$, $\mho_{02}$, and $\mho_{03}$ be the…

Classification conjecture. For each 2-spherical Coxeter diagram of type $M$, there is a bijective correspondence between twin buildings of type $M$ and certain Moufang foundations…