This Sage code implements ideas from the following references:
https://arxiv.org/abs/1003.0598 (parts of Section 2) https://arxiv.org/abs/0810.0687 (parts of Chapter 2) https://arxiv.org/abs/1604.08430
The goal is to build a toolset for analyzing knots and tangles using the apparatus of A-infinity algebras and Tangle-Floer homology.