English

Tropicalized Lambda Lengths, Measured Laminations and Convexity

Geometric Topology 2011-06-15 v1

Abstract

This work uncovers the tropical analogue for measured laminations of the convex hull construction of decorated Teichmueller theory, namely, it is a study in coordinates of geometric degeneration to a point of Thurston's boundary for Teichmueller space. This may offer a paradigm for the extension of the basic cell decomposition of Riemann's moduli space to other contexts for general moduli spaces of flat connections on a surface. In any case, this discussion drastically simplifies aspects of previous related studies as is explained. Furthermore, a new class of measured laminations relative to an ideal cell decomposition of a surface is discovered in the limit. Finally, the tropical analogue of the convex hull construction in Minkowski space is formulated as an explicit algorithm that serially simplifies a triangulation with respect to a fixed lamination and has its own independent applications.

Keywords

Cite

@article{arxiv.1106.2693,
  title  = {Tropicalized Lambda Lengths, Measured Laminations and Convexity},
  author = {R. C. Penner},
  journal= {arXiv preprint arXiv:1106.2693},
  year   = {2011}
}

Comments

23 pages, 6 figures

R2 v1 2026-06-21T18:22:12.232Z