We establish sufficient conditions implying semistability and connectivity at infinity properties for CAT(0) cubical complexes. We use this, along with the geometry of cubical K(pi, 1)'s to give a complete description of the higher connectivity at infinity properties of right angled Artin groups. Among other things, this determines which right angled Artin groups are duality groups. Applications to group extensions are also included.
Title
Connectivity at infinity for right angled Artin groups
Brady, N. and J. Meier. (2000) "Connectivity at infinity for right angled Artin groups." Transactions of the American Mathematical Society 353 (1): 117-132.