Well of course I have to mention my own book, Applied Abstract Algebra. It is online at http://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 [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 -~----------~----~----~----~------~----~------~--~---
