This is a Python reserved keyword, not a Sage decision, so we can not do much about that. Perhaps could you use Lambda instead ? If you use Sage compiled with Pyrhon 3, you can also use λ as a variable name.
This is a Python reserved keyword, not a Sage decision, so we can not do much about that. Perhaps could you use Lambda instead ? If you use Sage compiled with Pyrhon Python 3, you can also use λ as a variable name.