On 5/14/07, Martin Albrecht <[EMAIL PROTECTED]> wrote: > > Hi there, > > I am having trouble re-implementing MPolynomial.coeffient. The docstring > states: > > If f is this polynomial, then the coefficient is the sum T/mon > where the sum is over terms T in f that are exactly divisible > by mon. > > So e.g. > > sage: f = y^2 - x^9 - 7*x + 5*x*y > sage: f.coefficient(y) > 5*x + y
But y^2 isn't *exactly* divisible by y, so why is y there in the output? > > However, the doctest requires the result to be > > sage: f = y^2 - x^9 - 7*x + 5*x*y > sage: f.coefficient(y) > 5*x > > which is somewhat consistent with the docstring of the "inner" > PolyDict.coeffient function: > > Return a polydict that defines a polynomial in _1_less_number > of_variables_ that gives the coefficient of mon in this > polynomial. > > The coefficient is defined as follows. If f is this > polynomial, then the coefficient is the sum T/mon where the > sum is over terms T in f that are exactly divisible by mon. > > So, what is it supposed to do? > > Martin > > > -- > name: Martin Albrecht > _pgp: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x8EF0DC99 > _www: http://www.informatik.uni-bremen.de/~malb > _jab: [EMAIL PROTECTED] > > > > > --~--~---------~--~----~------------~-------~--~----~ 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://sage.scipy.org/sage/ and http://modular.math.washington.edu/sage/ -~----------~----~----~----~------~----~------~--~---
