If you're looking for an interesting but easy review, check out http://trac.sagemath.org/sage_trac/ticket/7644
The patch implements power series reversion (inverse under composition) with under 20 lines of code (plus ~60 lines of docstring), using Lagrange inversion. If you need to remind yourself about Lagrange inversion, you can check the Lagrange–Bürmann section of the Wikipedia article: http://en.wikipedia.org/wiki/Lagrange_inversion_theorem#Lagrange.E2.80.93B.C3.BCrmann_formula I've just verified that the patch applies cleanly to sage 4.6.1.alpha2, and passes all doctests. best, Niles -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
