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3-manifolds / Spherogram

Spherogram is a Python module for dealing with the kind of planar diagrams that arise in 3-dimensional topology, such as link and Heegaard diagrams. It a component of the larger SnapPy project.
https://snappy.math.uic.edu/spherogram.html
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Update tangles.py #27

Closed chaerynlee closed 2 years ago

chaerynlee commented 2 years ago

identity braid, n should be nonnegative

kmill commented 2 years ago

We accidentally created this PR while learning how to use git, sorry! We meant it to go to our own fork of Spherogram.

culler commented 2 years ago

I think it would be helpful to add a message to the assert command so that the user knows what the nature of the error is.

kmill commented 2 years ago

Could you close this PR @culler or @chaerynlee? We'll make these suggested changes over at https://github.com/kennethleebaker/Spherogram/pull/1