Higher-rank GBS groups: non-positive curvature and biautomaticity

Abstract

We characterise when a rank $n$ generalised Baumslag-Solitar group is CAT(0) and when it is biautomatic.

arXiv comment7 pages, v2: Some minor changes in the introduction; v3: Some minor changes according to the referee's comments. To appear in Geometriae Dedicata

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