Opened 11 years ago
Closed 10 years ago
#7662 closed enhancement (fixed)
Update is_chordal to return certificates
Reported by: | ncohen | Owned by: | rlm |
---|---|---|---|
Priority: | major | Milestone: | sage-4.6.2 |
Component: | graph theory | Keywords: | |
Cc: | Merged in: | sage-4.6.2.alpha0 | |
Authors: | Nathann Cohen | Reviewers: | Robert Miller |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description (last modified by )
This patch lets is_chordal return a certificate when asked to do so. The former algorithm is kept, and several lines are added to collect the certificate on the way and return it.
Nathann
Attachments (1)
Change History (11)
comment:1 Changed 11 years ago by
- Description modified (diff)
comment:2 Changed 10 years ago by
- Status changed from new to needs_work
comment:3 Changed 10 years ago by
- Description modified (diff)
- Status changed from needs_work to needs_review
- Summary changed from Chordal Graphs to Update is_chordal to return certificates
comment:4 Changed 10 years ago by
- Reviewers set to Robert Miller
- Status changed from needs_review to needs_work
comment:5 follow-up: ↓ 6 Changed 10 years ago by
- Status changed from needs_work to needs_info
Hello ! I added a short definition of what a hole is (a cycle of length at least 4), and replaced peo_copy by peo (sorry for that O_o
).
What about my Such an ordering is called a Perfect Elimination Order
? Would you like something more formal instead ?
Nathann
comment:6 in reply to: ↑ 5 Changed 10 years ago by
- Status changed from needs_info to needs_work
Replying to ncohen:
What about my
Such an ordering is called a Perfect Elimination Order
? Would you like something more formal instead ?
I'm not sure whether this is enough. Imagine a user who knows what the definition of chordal is, but not much else. You still want the documentation for this function to make sense to that user. Granted, it is not Sage's job to educate people about all of mathematics, but it certainly should be able to make clear what the input and output of each function is. Perhaps in this case it could do a better job of informing the user of what it is returning.
As long as you say what an elimination order is, then I think that's enough, but right now it is an undefined term.
Changed 10 years ago by
comment:7 Changed 10 years ago by
- Status changed from needs_work to needs_review
What about this one, then ?
It was a good idea to explain it... I quite liked writing it :-)
Nathann
comment:8 Changed 10 years ago by
- Status changed from needs_review to positive_review
Much better! :)
comment:9 Changed 10 years ago by
- Milestone changed from sage-4.6.1 to sage-4.6.2
comment:10 Changed 10 years ago by
- Merged in set to sage-4.6.2.alpha0
- Resolution set to fixed
- Status changed from positive_review to closed
You should define what a "perfect elimination order" and a "hole" are in the documentation.