Opened 5 years ago
Last modified 2 years ago
#17825 needs_work defect
Do not convert unsigned elements to InfinityRing
Reported by:  dkrenn  Owned by:  

Priority:  major  Milestone:  sage8.0 
Component:  coercion  Keywords:  
Cc:  Merged in:  
Authors:  Jeroen Demeyer  Reviewers:  Ralf Stephan 
Report Upstream:  N/A  Work issues:  
Branch:  u/jdemeyer/do_not_convert_unsigned_elements_to_infinityring (Commits)  Commit:  93a039f8e49a24fe02a1364db84991ac6422b130 
Dependencies:  Stopgaps: 
Description (last modified by )
sage: InfinityRing(x) A negative finite number sage: InfinityRing("junk") A positive finite number
Change History (10)
comment:1 Changed 3 years ago by
 Component changed from symbolics to coercion
 Description modified (diff)
 Milestone changed from sage6.6 to sage8.0
 Summary changed from wrong/weird conversion from SR to InfinityRing to Do not convert unsigned elements to InfinityRing
comment:2 Changed 3 years ago by
 Branch set to u/jdemeyer/do_not_convert_unsigned_elements_to_infinityring
comment:3 Changed 3 years ago by
 Commit set to e16686dc54477a38c063b875a6ced9d25fb606a1
 Status changed from new to needs_review
comment:5 Changed 2 years ago by
Do you plan to review this ticket if I fix the conflict?
comment:6 Changed 2 years ago by
Yes. I have asked others this question in the past. Perhaps some people use the code but don't want to review it...
comment:7 Changed 2 years ago by
 Commit changed from e16686dc54477a38c063b875a6ced9d25fb606a1 to 93a039f8e49a24fe02a1364db84991ac6422b130
Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:
93a039f  Do not convert unsigned elements to InfinityRing

comment:8 Changed 2 years ago by
 Status changed from needs_work to needs_review
comment:9 followup: ↓ 10 Changed 2 years ago by
 Reviewers set to Ralf Stephan
 Status changed from needs_review to needs_work
The sardonis patchbot has one relevant doctest fail. It appears that to determine RIF(1,1) < oo
it has to be coerced to the infinity ring but it has no sign. OTOH, RIF(1,1) < oo
is perfectly easily solvable so should not give an error.
comment:10 in reply to: ↑ 9 Changed 2 years ago by
Replying to rws:
OTOH,
RIF(1,1) < oo
is perfectly easily solvable so should not give an error.
That doesn't really matter. The coercion model always coerces. And it is the coercion which fails in this case. That is not easy to fix.
New commits:
Do not convert unsigned elements to InfinityRing