Marc Culler and I have released version 1.6 of SnapPy. There are two sets of new features:
- Creating links formulaically, e.g. via combining tangles algebraically. See our page of examples.
- Arbitrary precision calculation of certain things (e.g. tetrahedra shapes) and finding associated number fields, a la Snap. Very basic at this point compared to what Snap can to, but here are examples of what we have so far. To use this, you need to install SnapPy in Sage, which should be easy.