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. 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 --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
