As a representative of "the rest of thw world" I vote for (a), since I only use (b)when using Magma!
To keep everyone happy could we have both A.left_eigenspace() and A.right_eigenspace(), with A.eigenspace() bound to one of these by default? But the left e-space would be a space of row vectors while the right one would be a space of column vectors... While I'm here, I was surprised to see that there's no A.eigenvalues(). John On 26/10/2007, David Joyner <[EMAIL PROTECTED]> wrote: > > Hi: > I've forgotten the detals but I vaguely remember a discussion of > how we want to consider eigenspaces. There are two flavors for > the defn of eigenvalues/eigenvectors: > (a) A*v=lambda*v (which is common in the US) and > (b) v*A = lambda*v (which is common in other parts or the world). > Currently, it seems that eigenspaces uses (b). I wonder if there is any > support for adding an option to eigenspaces to use (a). > - David Joyner > > > > -- John Cremona --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
