Flipper¶
Flipper is a program for computing the action of mapping classes on laminations on punctured surfaces using ideal triangulation coordinates. It can decide the Nielsen–Thurston type of a given mapping class and, for pseudo-Anosov mapping classes, construct a layered, veering triangulation of their mapping torus, as described by Agol.
Flipper officially supports Python 3.6 – 3.9. It also runs on PyPy and Sage. To get the best performance, ensure that cypari (>= 2.4.0) or cypari2 is installed or run from it within Sage.
Quickstart¶
Flipper is available on PyPI, so it can be installed via:
$ pip install flipper --user --upgrade
Once installed, try it inside of Python:
>>> import flipper
>>> S = flipper.load('S_1_2')
>>> h = S('a.b.C')
>>> h.is_pseudo_anosov()
True
>>> print(h.dilatation())
2.296630262
The User Guide¶
This part of the documentation, which is mostly prose, begins with some background information about Flipper, then focuses on step-by-step instructions for getting the most out of Flipper.
The API Documentation¶
If you are looking for information on a specific function, class, or method, this part of the documentation is for you.
The Contributor Guide¶
If you want to contribute to the project, this part of the documentation is for you.
There are no more guides. You are now guideless. Good luck.
