On Fri, May 8, 2009 at 10:00 PM, Rob Beezer <[email protected]> wrote: > > I've put together a quick reference sheet (two pages) for linear > algebra commands in Sage. I'll do a bit more clean-up on this before > posting a final copy on the wiki in a couple days, so I know there is > a bit more work to do. Specifically, I might reorder the sections if > I come up with a more logical presentation. > > I'd really like to hear about any glaring omissions, or gross > misunderstandings of categories, vector spaces, modules, rings and/or > fields. Draft copy at > > http://buzzard.ups.edu/sage/quickref-linalg.pdf > > Thanks, > Rob
Maybe it would be better not to call the eigenvalues returned by A.eigenvectors_left() "lambda", since lambda is Python keyword (for lambda functions), so users can't use it without getting errors. The blue for functions is definitely pretty. It would be very good to include *all* the quickrefs in Sage (available via "Help" from the notebook). Since this would be a very nice visible feature, it would really have a positive impact. For A.gram_schmidt(), it doesn't fit on one line. Maybe reword as "apply to rows of matrix A". In Matrix Constructions, when you say "row and column numbering begins at 0!" it would be good to have another line that strongly emphasize that one types A[i,j] and *not* A[i][j]. This confuses the heck out of people. [I know it is given later, but still.] Your description of what B.iterates does is wrong (its' v*B^i -- see B.iterates?) Are you going to the next AMS meeting in San Francisco in 2010? These quickrefs would be nice to hand out at the booth. -- William --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sage-edu" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-edu?hl=en -~----------~----~----~----~------~----~------~--~---
