On Sun, Nov 2, 2008 at 3:10 AM, Wilfried_Huss <[EMAIL PROTECTED]> wrote: > > Hi, > > I have written some code for the Maxima interface. > You can find the patches at: > http://www.math.tugraz.at/~huss/sage > > calculus1.patch implements the conversion from Maxima > matrices to Sage matrices. > > calculus2.patch adds symbolic gamma and factorial functions. > (The factorial is named fact() so it doesn't clash with the > factorial in sage.rings.arith) > > Finally calculus3.patch renames the symbolic factorial to factorial(), > and changes all imports of sage.rings.arith.factorial to > sage.calculus.calculus.factorial. I had to keep a renamed version > of the factorial function in sage.rings.arith to avoid circular > imports at startup. > > The patches are against 3.2-alpha1, after applying all 3 patches > all tests passed. > > Here is a sample session with the new functionality: > > sage: var('x,y') > sage: v = maxima('v: vandermonde_matrix([x, y, 1/2])') > sage: v > matrix([1,x,x^2],[1,y,y^2],[1,1/2,1/4]) > sage: type(v) > <class 'sage.interfaces.maxima.MaximaElement'> > sage: v.sage() > > [ 1 x x^2] > [ 1 y y^2] > [ 1 1/2 1/4] > sage: mlist = maxima('[v, sin(x), 1, v.v]').sage() > sage: mlist > > [[ 1 x x^2] > [ 1 y y^2] > [ 1 1/2 1/4], > sin(x), > 1, > [ x^2 + x + 1 x*y + x^2/2 + x x*y^2 + 5*x^2/4] > [ y^2 + y + 1 3*y^2/2 + x y^3 + y^2/4 + x^2] > [ 7/4 y/2 + x + 1/8 y^2/2 + x^2 + 1/16]] > sage: [parent(i) for i in mlist] > > [Full MatrixSpace of 3 by 3 dense matrices over Symbolic Ring, > Symbolic Ring, > Symbolic Ring, > Full MatrixSpace of 3 by 3 dense matrices over Symbolic Ring] > > sage: gamma(x/2)(x=5) > 3*sqrt(pi)/4 > > sage: f = factorial(x + factorial(y)) > sage: maxima(f).sage() > factorial(factorial(y) + x) > > sage: f(y=x)(x=3) > 362880 > > I hope it is useful. > > Greetings, > Wilfried Huss
Thanks! Could you write to Michael Abshoff (<[EMAIL PROTECTED]>) and ask for a trac account, then open three trac tickets, one for each of the above? Thanks again! William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@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-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
