John Abbott's activity
From 05 Jan 2024 to 03 Feb 2024
03 Feb 2024
02 Feb 2024
- 20:34 CoCoALib Bug #1764: Verbosity messages: avoid printing BIG values
- Here is a list of files which have been checked (so that we do not repeatedly check them):
* @ApproxPts2.C@
* *@END@* - 20:34 CoCoALib 0.10 hour (Bug #1764 (In Progress): Verbosity messages: avoid printing BIG values)
- List of files checked
- 20:21 CoCoALib 0.20 hour (Feature #1778 (In Progress): Homogenizer)
- Term order
- 20:21 CoCoALib Feature #1778: Homogenizer
- The ctor for @homogenizer@ will create the extended polynomial ring.
What properties should this extended ring have?... - 20:13 CoCoALib Feature #1778: Homogenizer
- Following KISS, it is probably best to try the simple interface first.
If it works well, and we like it, then we can... - 20:13 CoCoALib 0.10 hour (Feature #1778 (In Progress): Homogenizer)
- Possible extensions
- 20:10 CoCoALib Feature #1778: Homogenizer
- I am not yet sure of the details, but I am hoping that it can be used as in this example:...
- 20:10 CoCoALib 0.50 hour (Feature #1778 (In Progress): Homogenizer)
- Possible interface
- 20:04 CoCoALib Feature #1778 (In Progress): Homogenizer
- Here is a suggestion for a cleaner, simpler way to effect homogenization.
The main idea is to create a new type of o... - 20:01 CoCoALib 0.25 hour (Design #1647 (Closed): Suppress zero from ideal generators? Detect 1 and simplify generators?)
- Example
- 20:01 CoCoALib Design #1647: Suppress zero from ideal generators? Detect 1 and simplify generators?
- Here is an example where the resulting gens could clearly be cleaned up:...
01 Feb 2024
- 19:59 CoCoALib 0.20 hour (Slug #1737 (In Progress): Homogenization of an ideal with ZZ^1-grading)
- Anna?
- 19:59 CoCoALib Slug #1737: Homogenization of an ideal with ZZ^1-grading
- Anna, are you willing to investigate point (1): the implementation behaving cleverly if the term order is wdeg-compat...
- 10:42 CoCoALib Design #1750: IdealOfPoints: allow duplicate points?
- @MakeSet@ is OK for CoCoA-5 and *affine points.* In CoCoALib/C++ and/or with projective points it is not so simple.
... - 10:42 CoCoALib 0.15 hour (Design #1750 (In Progress): IdealOfPoints: allow duplicate points?)
- CoCoALib
- 10:17 CoCoALib Design #1750: IdealOfPoints: allow duplicate points?
- The CoCoA-5 manual already says that the points must be distinct (as a quick reaction to the problem reported by puw...
- 10:17 CoCoALib 0.25 hour (Design #1750 (In Progress): IdealOfPoints: allow duplicate points?)
- Partly done
- 10:03 CoCoALib 0.10 hour (Design #1777 (New): VerificationLevel: just 3? Low, high, guaranteed?)
- Currently
- 10:03 CoCoALib Design #1777: VerificationLevel: just 3? Low, high, guaranteed?
- Currently we allow any non-negative machine integer as the "verification level", but there is no clear semantics.
- 09:50 CoCoALib Slug #1739: IsHomog for ideals
- Could it be useful to have also *@IsHomog3@* which returns a @bool3@?
- 09:50 CoCoALib 0.10 hour (Slug #1739 (Closed): IsHomog for ideals)
- Also IsHomog3?
- 09:47 CoCoALib Slug #1739: IsHomog for ideals
- Source is in @SparsePolyOps-ideal.C:908@ more or less
- 09:47 CoCoALib 0.10 hour (Slug #1739 (Closed): IsHomog for ideals)
- Source
31 Jan 2024
- 22:26 CoCoALib 4.00 hours (Feature #1197 (In Progress): IsZeroDet: new fn)
- Partly done
- 22:26 CoCoALib Feature #1197: IsZeroDet: new fn
- There is some non-trivial code in *@MatrixOps-IsZeroDet.C@* developed from a project in Passau...
- 22:16 CoCoALib Design #1750: IdealOfPoints: allow duplicate points?
- Should we implement this? Or postpone it? Or reject it?
What is most natural?
Is it really a mistake to ask for... - 22:16 CoCoALib 0.10 hour (Design #1750 (In Progress): IdealOfPoints: allow duplicate points?)
- Implement or postpone?
- 22:14 CoCoALib Slug #1739 (In Progress): IsHomog for ideals
- I say impl the suggestion in the main description: it should be very little code, and may make some computations fast...
- 22:14 CoCoALib 0.20 hour (Slug #1739 (Closed): IsHomog for ideals)
- Go for it!
- 22:07 CoCoALib Slug #1737 (In Progress): Homogenization of an ideal with ZZ^1-grading
- Yes, it would be possible to implement this, and perhaps not even too hard. *But why?*
When would it be useful? Is ... - 22:07 CoCoALib 0.20 hour (Slug #1737 (In Progress): Homogenization of an ideal with ZZ^1-grading)
- But why?
- 22:02 CoCoALib Support #1665: Compilation on Windows: problems for normaliz
- Is this still a problem? Maybe we can ask Nico?
- 22:02 CoCoALib 0.10 hour (Support #1665 (New): Compilation on Windows: problems for normaliz)
- Still a problem?
25 Jan 2024
- 20:27 CoCoALib 0.20 hour (Design #1703 (Resolved): Threadsafety, multithreading: optional fn arg (or separate fn))
- Trickier than hoped.
- 20:27 CoCoALib Design #1703 (Resolved): Threadsafety, multithreading: optional fn arg (or separate fn)
- *SUMMARY*
Offering proper thread-safety is likely trickier than I had hoped, and probably decidedly more costly at r... - 20:22 CoCoALib 0.50 hour (Design #1703 (Resolved): Threadsafety, multithreading: optional fn arg (or separate fn))
- Bother!
- 20:22 CoCoALib Design #1703: Threadsafety, multithreading: optional fn arg (or separate fn)
- Anna reported compilation warnings with @clang@:
@std::mutex@ cannot be copied or moved, so attempting to have defau... - 10:12 CoCoALib Bug #1579: Readexpr/RingElem: unhelpful error message when input is wrong
- Here is another test case: @RingElem(R, "y(x)")@
Looks like a function call...
- 10:12 CoCoALib 0.25 hour (Bug #1579 (Closed): Readexpr/RingElem: unhelpful error message when input is wrong)
- Another test case
23 Jan 2024
- 22:14 CoCoALib 0.10 hour (Feature #1715 (New): ProductBigInt (also ProductBigRat???))
- Some notes
- 22:14 CoCoALib Feature #1715: ProductBigInt (also ProductBigRat???)
- If I recall well, a first attempt was disappointing.
One may have to be clever if many factors are small integers.
- 22:13 CoCoALib Feature #947: IsRadical for ideal?
- I think my idea might not work in general.
Let @I := ideal(x+y^2)@ then @I@ *is* radical. But if I add an extra ge... - 22:13 CoCoALib 0.40 hour (Feature #947 (In Progress): IsRadical for ideal?)
- Might be tricky
- 09:27 CoCoALib Design #1777: VerificationLevel: just 3? Low, high, guaranteed?
- I discussed withe the OSCAR people about putting something similar into Oscar. There it seemed simpler/clearer to of...
- 09:27 CoCoALib 0.20 hour (Design #1777 (New): VerificationLevel: just 3? Low, high, guaranteed?)
- Some notes
- 09:25 CoCoALib Design #1777 (New): VerificationLevel: just 3? Low, high, guaranteed?
- Should there be just 3 @VerificationLevel@ values?
* *@low@* fast but greater chance of wrong answer
* *@high@* sl...
22 Jan 2024
- 20:28 CoCoALib Feature #539: Functions to clean up a factorization
- Do you have a good use-case for this?
So far I have not needed such a function. Anyway priority is _low_.
- 20:28 CoCoALib 0.10 hour (Feature #539 (New): Functions to clean up a factorization)
- Why?
- 20:24 CoCoALib Feature #1349 (In Progress): ideal ctor where given gens are a gbasis
- What is the status of this issue?
The previous comment suggests that it should be _feedback_ or _closed_. Is there ... - 20:24 CoCoALib 0.10 hour (Feature #1349 (In Progress): ideal ctor where given gens are a gbasis)
- Status?
- 20:14 CoCoALib Design #1753 (Feedback): Clean up EulerTotient, InvTotient jungle in NumTheory-misc
- I have cleaned the code:
* removed the InvTotient iterator which is superseded by the new code (which is fast enough... - 20:14 CoCoALib 0.75 hour (Design #1753 (Closed): Clean up EulerTotient, InvTotient jungle in NumTheory-misc)
- Cleaning
- 19:41 CoCoALib 0.10 hour (Design #1647 (Closed): Suppress zero from ideal generators? Detect 1 and simplify generators?)
- Other operations
- 19:41 CoCoALib Design #1647: Suppress zero from ideal generators? Detect 1 and simplify generators?
- Which ideal operations could benefit from @CleanGens@?
Sum, product, maybe colon. Radical?
It might make sense t... - 19:39 CoCoALib Design #1647: Suppress zero from ideal generators? Detect 1 and simplify generators?
- Here is an outline heuristic for cleaning the generators:
* remove zeroes
* collect all monomial gens, compute GBas... - 19:39 CoCoALib 0.40 hour (Design #1647 (Closed): Suppress zero from ideal generators? Detect 1 and simplify generators?)
- Ideas about cleaning
- 10:47 CoCoALib 0.10 hour (Design #908 (Closed): Sum of ideals: what are the generators of (x) + (0)?)
- Doc makes no guarantees
- 10:47 CoCoALib Design #908: Sum of ideals: what are the generators of (x) + (0)?
- Anna has just confirmed that the documentation *does not guarantee* that @gens(I+J) = concat(...)@. This is good!
- 10:44 CoCoALib 0.20 hour (Design #908 (Closed): Sum of ideals: what are the generators of (x) + (0)?)
- Current state
- 10:44 CoCoALib Design #908: Sum of ideals: what are the generators of (x) + (0)?
- Status on 2024-01-22...
- 10:37 CoCoA-5 0.20 hour (Feature #368 (In Progress): port SmithNormalForm (CoCoA-4)package to CoCoA-5)
- Passau code
- 10:37 CoCoA-5 Feature #368: port SmithNormalForm (CoCoA-4)package to CoCoA-5
- JAA has some new code from Passau which should be in integrated...
- 10:36 CoCoALib Design #1768 (Closed): Limit indentation in verbose mesgs?
21 Jan 2024
- 20:33 CoCoALib Slug #1569 (In Progress): IsInRadical too slow (test-RadicalMembership)
- The "stupid approach" gets the answer in 10s (on my Linux laptop)....
- 20:33 CoCoALib 0.25 hour (Slug #1569 (Closed): IsInRadical too slow (test-RadicalMembership))
- Stupid approach
- 20:21 CoCoALib Bug #1662: txt2tags: problem with filenames containing "_" or "-"
- What is the status of this issue?
Is it now resolved if one uses the updated @txt2tags@ which Nico mentioned? Which... - 20:21 CoCoALib 0.10 hour (Bug #1662 (Resolved): txt2tags: problem with filenames containing "_" or "-")
- Status?
- 20:16 CoCoALib 0.25 hour (Bug #1579 (Closed): Readexpr/RingElem: unhelpful error message when input is wrong)
- Added new err mesg
- 20:16 CoCoALib Bug #1579: Readexpr/RingElem: unhelpful error message when input is wrong
- I have added a new error mesg for the case that the first extra char is open-bracket or letter or digit.
The err mes... - 20:01 CoCoALib 0.25 hour (Design #64 (Closed): submat takes only vector<long>)
- More thoughts
- 20:01 CoCoALib Design #64: submat takes only vector<long>
- In comment 8 Anna says that practically all uses could be replaced by *@FirstRows(M,n)@*, so it makes a lot of sense ...
- 19:46 CoCoALib 0.20 hour (Bug #1361 (Closed): Compilation fails when compiling with libgsl)
- Still a problem?
- 19:46 CoCoALib Bug #1361: Compilation fails when compiling with libgsl
- Hi Florian. Does compilation still fail with version 0.99818 (from website)? Thanks!
19 Jan 2024
- 18:11 CoCoA-5 0.40 hour (Design #1626 (Feedback): NewMat: should be obsolescent?)
- Revised manual
- 18:11 CoCoA-5 Design #1626 (Feedback): NewMat: should be obsolescent?
- JAA has revised the manual entry, and changed calls in @packages@ to @ZeroMat@
Anna will revise the defn in @Backwar...
16 Jan 2024
- 19:07 CoCoA-5 Bug #1623: EmacsUI: annoying colours
- Not bad! Minor variant: using square brackets for lists...
- 19:07 CoCoA-5 0.20 hour (Bug #1623 (Feedback): EmacsUI: annoying colours)
- Another variant
15 Jan 2024
- 19:54 CoCoA-5 0.10 hour (Bug #1623 (Feedback): EmacsUI: annoying colours)
- Reactivate?
- 19:54 CoCoA-5 Bug #1623: EmacsUI: annoying colours
- Can we conclude this discussion, implement, and close? :-)
- 19:49 CoCoA-5 Bug #469: Emacs UI: keywords in multiline comments
- [2024-01-15] I have just confirmed that the bug is still there.
If the code is commented out with *@//@* or *@--@* ... - 19:49 CoCoA-5 0.25 hour (Bug #469 (Resolved): Emacs UI: keywords in multiline comments)
- Bug still there
- 19:42 CoCoA-5 Design #1626: NewMat: should be obsolescent?
- Yes, we should make @NewMat@ obsolete/backward-compatible-only.
This should be an easy change (don't forget the doc ... - 19:42 CoCoA-5 0.10 hour (Design #1626 (Feedback): NewMat: should be obsolescent?)
- Obsolete or BackwardCompatible?
- 19:39 CoCoA-5 0.20 hour (Feature #1541 (New): foreach with ref to list entry?)
- Might be tricky
- 19:39 CoCoA-5 Feature #1541: foreach with ref to list entry?
- Postponing this issue because it requires discussion, and could be tricky/lengthy if we opt to to make the change.
I... - 19:32 CoCoA-5 0.10 hour (Slug #1363 (In Progress): Emacs UI: slow with long lines)
- So long
- 19:32 CoCoA-5 Slug #1363 (In Progress): Emacs UI: slow with long lines
- I did take a look at @so-long.el@, and it did help a bit.
Handling of long lines is a known emacs weakness; probably...
13 Jan 2024
- 22:27 CoCoALib 0.20 hour (Slug #1756 (In Progress): deg(f) is slow if f is long)
- Update?
- 22:27 CoCoALib Slug #1756: deg(f) is slow if f is long
- I have re-run the example from comment 2: it now takes 0.001s.
I'm undecided about the extra generality handling t... - 22:20 CoCoALib Design #1768: Limit indentation in verbose mesgs?
- Can we close this?
*Anna* do you agree? - 22:20 CoCoALib 0.10 hour (Design #1768 (Closed): Limit indentation in verbose mesgs?)
- Close?
- 22:16 CoCoALib 0.10 hour (Slug #1739 (Closed): IsHomog for ideals)
- Question
- 22:16 CoCoALib Slug #1739: IsHomog for ideals
- This should be easy to implement, right?
I was wondering how often one would want to know whether an ideal is homog ...
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