#4149: [with patch, needs review] make every field a fraction field
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Reporter: jhpalmieri | Owner: tbd
Type: defect | Status: new
Priority: minor | Milestone: sage-3.1.3
Component: algebra | Resolution:
Keywords: fraction field, fractionfield |
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Comment (by cremona):
My 2 cents: I agree that is_* functions are not needed at the top level,
as people can import them if needed in code, while users can use an
object's own .is_*() functions.
The only problem with that is that there will surely be many places where
the answer is clear but not currently implemented, such as
sage: ZZ.is_integrally_closed()
!NotImplementedError
This is bound to happen. There is no algorithm which can be applied to
arbitrary rings and determine whether they are integrally closed; but a
lot of special classes are known to be so, and these really should define
the relevant functions to return True.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4149#comment:10>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
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