[sage-support] Re: Is a root an accessible thing?

is r3[13], not r3[0]. sage: a1r3=r3[13] sage: a1r3.to_weight_space() 2*Lambda[1] - Lambda[2] sage: a1r3.to_simple_root() 1 sage: a1r3==a1r1 True sage: a1r3==a1r2 True On Wednesday, July 27, 2016 at 4:26:06 AM UTC-4, Joseph Hundley wrote: > > I've been looking around in the documen

[sage-support] "Could not import extension sage_autodoc"

sage --docbuild html produces many errors that look like this *[tensor ]* *Extension error:* *[tensor ]* Could not import extension sage_autodoc (exception: cannot import name sage_formatargspec) Build finished. The built documents can be found in

[sage-support] Is a root an accessible thing?

I've been looking around in the documentation for root systems. It's not clear to me whether the individual roots in the system are accessible objects. For example, I can take the root system F4. sage: rs=RootSystem("F4") sage: r1=rs.root_lattice().positive_roots() sage: