# Revision history [back]

If you want to compute the projection of p2 in S, you should write:

sage: q = S(p2)
sage: q
2*ybar^2
sage: q
2*ybar^2
sage: q.parent()
Quotient of Multivariate Polynomial Ring in x, y over Rational Field by the ideal (x - y)
sage: S
Quotient of Multivariate Polynomial Ring in x, y over Rational Field by the ideal (x - y)


In a general quotient ring, the degree is not well defined, but you can get the minimal degree of a representative of q in R by lifting q:

sage: q.lift().degree()
2