On Fri, May 2, 2008 at 11:04 AM, <[EMAIL PROTECTED]> wrote: > > That's an excellent suggestion ! I've just ordered it. I already had > your book on group theory. > > I guess it should be easy to do the GAP/Magma code in Sage. > > By the way, I also find your "teach" pages very interesting. > > As for the bug, I'll use William Stein's suggestion of the digits > method. >
By the way, the oct issue has been fixed and the fix will be in the next version of Sage. (Vesion 3.0.1). > Yann > > > On Apr 30, 12:42 pm, "David Joyner" <[EMAIL PROTECTED]> wrote: > > Well of course I have to mention my own book, Applied Abstract Algebra. > > It is online athttp://wdjoyner.com/teach/book/. Browse all you want. > > > You can also buy it in hardcover (from JHUP available via amazon.com). > > Full disclosure: all royalties go directly to to charity. It does have > > GAP examples but no > > SAGE examples in it. > > > > > > On Wed, Apr 30, 2008 at 3:28 AM, Yann Le Du <[EMAIL PROTECTED]> wrote: > > > > > > > > > Hello, > > > > > First, the function oct does not work properly, it seems. > > > > > oct(2345) fails in Sage (but works in Python) > > > oct(int(2345)) works > > > hex(2345) works > > > > > Irc said it was the preparser. Why would the input of oct be preparsed > > > correctly and not that of hex ? > > > > > Sage uses notions from abstract algebra. I never use abstract algebra > when > > > doing my coding in physics. I guess software like Mathematica kind of > > > guesses the best way to proceed with the input I give. Now, this guess > > > might not be the most appropriate. > > > > > So I'd be grateful if anyone had some suggestions for a book on abstract > > > algebra that would teach me the practical usage of rings, fields, etc. > > > from a computational point of view ; something like "common > computational > > > errors and fallacies corrected by an abstract algebra approach", > something > > > that would build upon ideas like "1/3 + 1/10**20 - 1/3" is better done > in > > > the the rationals than in the floats. Maybe some book similar to Forman > > > Acton's books that would explicitly use notions of abstract algebra. > > > > > I had a look at Schaum's Modern Abstract Algebra by Ayres, 2004, but > > > comments on amazon mentioned multiple errors, opacities and out of > > > datedness. Irc suggested wikipedia. Any other suggestion ? > > > > > Cheers, > > > > > -- > > > Yann Le Du > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ 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-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
