In each case below "I" and "J" are defined by different choices of
generators and are recognized as the same ideal.  In case 1 the
quotients are considered equal and in case 2 they are considered
unequal.

(I checked this with the latest version)

Case 1:
----------

sage: R.<x> = PolynomialRing(QQ)
sage: I = R.ideal([x + x^2, x])
sage: J = R.ideal([2*x + 2*x^2, x])
sage: S = R.quotient_ring(I)
sage: U = R.quotient_ring(J)
sage: I==J
True
sage: S==U
True

Case 2:
----------

sage: R.<x> = PolynomialRing(QQ)
sage: I = R.ideal([x + x^2])
sage: J = R.ideal([2*x + 2*x^2])
sage: S = R.quotient_ring(I)
sage: U = R.quotient_ring(J)
sage: I==J
True
sage: S==U
False

***

Cheers!  Let me know what happens about this :)

- Critch

--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-devel@googlegroups.com
To unsubscribe from this group, send email to 
sage-devel-unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URLs: http://www.sagemath.org
-~----------~----~----~----~------~----~------~--~---

Reply via email to