Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

Coefficients of a constant polynomial

If have a list A of polynomials in x and y and want the coefficients of x. Here is what I do:


A = [x, y, xy + 3y^2]

for p in A : print p.coefficients(x)

And here is what I get:

[[1, 1]]

[[y, 0]]

[[3*y^2, 0], [y, 1]]

That's fine. My next list to process is

B = [1, x, y, xy + 3y^2]

And here is what I get:

AttributeError: 'sage.rings.integer.Integer' object has no attribute 'coefficients'.

I expected the answer 0 as the coefficient of x of the polynomial p(x, y) = 1 is 0.

How do I get around this behavior of Sage?