ApproxFun/ApproxFun.jl — pull request #75 by MikaelSlevinsky (2014-12-17 15:47:17+00:00)
Title: Feature update sigma

Sigma has a domain and range space.
Addentries! is updated for all ultraspherical spaces since they’re
orthogonal with the weight (1-x^2)^{λ-1/2}.
Included Sigma tests.