Special Cube Complexes
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- Haglund, F. & Wise, D.T. GAFA Geom. funct. anal. (2008) 17: 1551. doi:10.1007/s00039-007-0629-4
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We introduce and examine a special class of cube complexes. We show that special cube-complexes virtually admit local isometries to the standard 2-complexes of naturally associated right-angled Artin groups. Consequently, special cube-complexes have linear fundamental groups. In the word-hyperbolic case, we prove the separability of quasiconvex subgroups of fundamental groups of special cube-complexes. Finally, we give a linear variant of Rips’s short exact sequence.