Computation of the taut, the veering and the Teichm\"uller polynomials
Abstract
Landry, Minsky and Taylor [LMT] introduced two polynomial invariants of veering triangulations -- the taut polynomial and the veering polynomial. We give algorithms to compute these invariants. In their definition [LMT] use only the upper track of the veering triangulation, while we consider both the upper and the lower track. We prove that the lower and the upper taut polynomials are equal. However, we show that there are veering triangulations whose lower and upper veering polynomials are different. [LMT] related the Teichm\"uller polynomial of a fibred face of the Thurston norm ball with the taut polynomial of the associated layered veering triangulation. We use this result to give an algorithm to compute the Teichm\"uller polynomial of any fibred face of the Thurston norm ball.
Keywords
Cite
@article{arxiv.2009.13558,
title = {Computation of the taut, the veering and the Teichm\"uller polynomials},
author = {Anna Parlak},
journal= {arXiv preprint arXiv:2009.13558},
year = {2021}
}
Comments
32 pages, 15 figures, 5 algorithms. In version 2 we no longer consider modules obtained by the extension of scalars. The algorithm for the computation of the Teichmuller polynomial is corrected. In the previous version in some cases the output had a redundant linear factor