#10342: Divisor groups and cohomology rings should not make uniqueness decisions
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Reporter: novoselt | Owner: AlexGhitza
Type: defect | Status: new
Priority: major | Milestone:
Component: algebraic geometry | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by vbraun):
I think that, in this case, the `__cmp__` of toric varieties should be
strengthened so that `X1==X2` if and only if `X1 is X2`. Otherwise you
have `X1==X2` but you would be unable to add divisors and cohomology
classes. Moreover, these operations would yield a confusing error message
since `X1._repr_()==X2._repr_()`.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10342#comment:3>
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