On Jul 20, 12:04 pm, Donu Arapura <[EMAIL PROTECTED]> wrote: hi Donu,
> I apologize in advance for my somewhat rambling post. I don't have > any really urgent > questions; just a few small ones, along with some comments. I'm an > algebraic > geometer, so I use Macaulay 2 for certain things, but often I prefer > Maple > which has a lot more flexibility. Although I have free access to > Maple through > my University, I have never been entirely comfortable with this... > but I suppose > it's not necessary to preach to the choir. :) > I'd heard some rumours > about Sage, > and I recently downloaded it to my Mac (G5, macosx 10.4). I have > been playing > with it for a couple of days, and I am pretty impressed. However... > > In Maple I find it convenient to use "%" to refer to the output on > the previous line. > Is there a way to do this in Sage? If not, would this or a scheme > using line numbers, > be a useful feature to add? I assume you need the following? ---------------------------------------------------------------------- | SAGE Version 3.0.5, Release Date: 2008-07-11 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: 2+2 4 sage: _ 4 sage: > As a more serious exercise, I tried writing a script in Sage. Since > I'm pretty new to Python, I have to admit that I was a bit taken > aback that > indentation was part of the language, but it's not a big deal. > Anyway, I > found that I could manage by typing things into emacs (actually > aquamacs) > and pasting the formatted code into the notebook, since I like to > debug one > function at a time. This seems a bit clumsy however. What to other > people do? > Surely, it must be possible to have emacs communicate directly with > sage? Yes, check out http://wiki.sagemath.org/sage-mode For the record I have to state that Emacs is evil and that only vim can bring true happiness, but there are a lot of happy Emacs users with Sage. > Incidentally, the script in question computes Betti numbers for > moduli spaces > of vector bundles using standard formulas. I'm happy to say that it > seems to > be working correctly under Sage. I've checked it against values > generated by > my original Maple script and published values for small rank and genus. Excellent. Please let us know if you run into any trouble. We are more than happy to fix bugs. > Anyway, my thanks to all for putting this package together. > > - Donu Arapura Cheers, Michael --~--~---------~--~----~------------~-------~--~----~ 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://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
