Shadows of Teichmüller Discs in the Curve Graph. (4th February 2017)

• Record Type: Journal Article
• Authors: Tang, Robert; Webb, Richard C H
• Is Part Of: International mathematics research notices. Volume 2018:Number 11(2018)
• Page Start: 3301
• Page End: 3341
• Publication Date: 2017-02-04
• Subjects: Mathematics -- Periodicals; 510
• DOI: 10.1093/imrn/rnw318
• Languages: English
• ISSNs: 1073-7928

Abstract

Abstract: We consider several natural sets of curves associated to a given Teichmüller disc, such as the systole set or cylinder set, and study their coarse geometry inside the curve graph. We prove that these sets are quasiconvex and agree up to uniformly bounded Hausdorff distance. We describe two operations on curves and show that they approximate nearest point projections to their respective targets. Our techniques can be used to prove a bounded geodesic image theorem for a natural map from the curve graph to the filling multi-arc graph associated to a Teichmüller disc.