Opened 9 years ago
Closed 8 years ago
#14890 closed defect (wontfix)
rounding in logs
Reported by: | Amy Feaver | Owned by: | Alex Ghitza |
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Priority: | minor | Milestone: | sage-duplicate/invalid/wontfix |
Component: | basic arithmetic | Keywords: | logarithm mpfr rounding |
Cc: | Merged in: | ||
Authors: | Reviewers: | Jeroen Demeyer | |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description (last modified by )
Logarithms are not rounded correctly:
sage: (3.0^5).log(3.0) - 5.0 -8.88178419700125e-16
Change History (8)
comment:1 Changed 9 years ago by
Authors: | Amy Feaver, Anne Ho |
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comment:2 Changed 9 years ago by
Milestone: | sage-6.1 → sage-6.2 |
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comment:3 Changed 9 years ago by
Milestone: | sage-6.2 → sage-6.3 |
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comment:4 Changed 8 years ago by
Component: | calculus → basic arithmetic |
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Description: | modified (diff) |
Keywords: | logarithm mpfr rounding added; logarithms removed |
Owner: | changed from Burcin Erocal to Alex Ghitza |
comment:5 Changed 8 years ago by
Milestone: | sage-6.3 → sage-6.4 |
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comment:6 Changed 8 years ago by
Milestone: | sage-6.4 → sage-duplicate/invalid/wontfix |
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Reviewers: | → Jeroen Demeyer |
Status: | new → needs_review |
Sage is not the place to implement this. If you really need this, it should be implemented in MPFR, then Sage can interface it.
Close as "wontfix".
comment:7 Changed 8 years ago by
Status: | needs_review → positive_review |
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comment:8 Changed 8 years ago by
Resolution: | → wontfix |
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Status: | positive_review → closed |
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author is for the author of the patch :) This is probably typical floating point stuff, not sure how easy it would be to fix.