Opened 14 years ago
Closed 13 years ago
#517 closed defect (duplicate)
abelian_group_element / dual_abelian_group_element classes need rewrite
Reported by: | boothby | Owned by: | boothby |
---|---|---|---|
Priority: | major | Milestone: | sage-duplicate/invalid/wontfix |
Component: | basic arithmetic | Keywords: | |
Cc: | Merged in: | ||
Authors: | Reviewers: | ||
Report Upstream: | Work issues: | ||
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
Implementation uses slow algorithms, where O(1) algorithms are easy.
Change History (5)
comment:1 Changed 14 years ago by
- Priority changed from minor to major
- Type changed from enhancement to defect
comment:2 Changed 14 years ago by
- Milestone set to sage-2.9.1
comment:3 Changed 13 years ago by
comment:4 Changed 13 years ago by
Unfortunately, there is still (in sage 3.0) a serious lack of functionality for infinite abelian groups. I don't see an easy fix for this bug. Currently, it is AbelianSemiGroupExceptWhenFiniteThenItIsAbelianGroup_class:-)
comment:5 Changed 13 years ago by
- Milestone changed from sage-3.1.1 to sage-duplicate/invalid
- Resolution set to duplicate
- Status changed from new to closed
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Problems are more serious than I originally thought. I would now describe AbelianGroup? and AbelianGroupElement? as "severely broken".
Z^{4} is a subgroup of Z???
You can't compute the inverse of a group element?