Mathematics – Geometric Topology
Scientific paper
2007-06-19
J. Ramanujan Math. Soc. 24, No.4 (2009) 341-357
Mathematics
Geometric Topology
v2 Final version incorporating refree comments 16pgs no figs
Scientific paper
A family of interpolating graphs $\calC (S, \xi)$ of complexity $\xi$ is constructed for a surface $S$ and $-2 \leq \xi \leq \xi (S)$. For $\xi = -2, -1, \xi (S) -1$ these specialise to graphs quasi-isometric to the marking graph, the pants graph and the curve graph respectively. We generalise Theorems of Brock-Farb and Behrstock-Minsky to show that the rank of $\calC (S, \xi)$ is $r_\xi$, the largest number of disjoint copies of subsurfaces of complexity greater than $\xi $ that may be embedded in $S$. The interpolating graphs $\calC (S, \xi)$ interpolate between the pants graph and the curve graph.
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