Activity
From 07 Feb 2024 to 07 Mar 2024
07 Mar 2024
- 21:39 Design #908: Sum of ideals: what are the generators of (x) + (0)?
- Fully resolved now? Close?
- 21:18 Bug #1726: Dangling references to temporaries
- Maybe I have understood what is upsetting the compiler.
The variable @P@ is a @ring&@, but @CoeffRing@ expects an ar... - 20:49 Design #1166 (Closed): C++11: allows large integer literals (in NumTheory-prime.C)
- Some time ago we adopted the C++14 standard. Sooner or later we shall jump to C++20 ???
The affected functions are ... - 20:35 Feature #1559: Default ctor for rings
- It is not completely clear to me what is desired. Winfried, can you clarify? Maybe give an example?
Were you able ... - 20:31 Design #1735 (Rejected): PushFront/PushBack without checks?
- Even the documentation mentioned about @myPushFront@ _etc_. I have slightly improved the doc.
Otherwise we can reje... - 20:20 Feature #1770 (Feedback): Evaluate polynomial function/class
- The new code is in *@SparsePolyOps-eval@*
The current impl is rather restricted: the polynomial has to be over @ZZ... - 20:10 Design #1753 (Closed): Clean up EulerTotient, InvTotient jungle in NumTheory-misc
- The header & source files look to be acceptably neat & tidy. So closing.
- 20:06 Design #1753: Clean up EulerTotient, InvTotient jungle in NumTheory-misc
- The relevant files are *@NumTheory-misc@*.
Tests are in *@test-NumTheory1,C@*. - 20:01 Feature #839 (In Progress): SparsePolyIter: make more compatible with STL
- In comment 5 above, the disadvantage that an iterator could be invalidated by a structure-changing operation to the p...
- 19:51 Design #1787: Iterator design: compatible with C++STL? Advancing beyond end?
- I think it would be nice to be able to use CoCoALib iterators with the "new" @for@ loop syntax. I note also that C++...
- 19:40 Design #1787 (In Progress): Iterator design: compatible with C++STL? Advancing beyond end?
- Two (unrelated) matters regarding iterators in CoCoALib:
# if we make them compatible with STL iterators then we can... - 19:26 Feature #379: Iter for subsets/tuples
- *ANNA* have you tested this?
01 Mar 2024
- 18:40 Slug #1569 (Closed): IsInRadical too slow (test-RadicalMembership)
- 18:38 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- Anna Maria Bigatti wrote:
> Implement special version for monomial ideals
Moved to issue #1786 - 17:12 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- Anna Maria Bigatti wrote:
> There is a slow test in test-RadicalMembership1 which is slower than the others and ver... - 09:44 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- There is a slow test in test-RadicalMembership1 which is slower than the others and very slow with debugging on (20m...
- 18:37 Feature #1786 (New): Add new function for IsInRadical for monomial ideals? (RadicalMembership)
- A monomial version could be quite a bit faster than the general code.
But is this really needed?
Consider calling @... - 14:57 Slug #1739 (Closed): IsHomog for ideals
- 14:48 Slug #1739: IsHomog for ideals
- John Abbott wrote:
> Could it be useful to have also *@IsHomog3(I)@* which returns a @bool3@?
it could be handy t... - 14:37 Slug #1739: IsHomog for ideals
- Anna Maria Bigatti wrote:
> check if there is a "homog" flag to be set
The answer is "no" (#1784). - 14:53 Feature #1785: Add function IsHomog3(I)?
- See implementation of @IsHomog(I)@ in @SparsePolyOps-ideal.C@ (and #1739)
- 14:51 Feature #1785 (New): Add function IsHomog3(I)?
- Should we have a "quick" bool3 function (i.e. might return @uncertain@) saying if an ideal is homogeneous?
Useful? - 14:36 Feature #1784 (New): Add flag IhaveHomogGensValue for ideals in SparsePolyRing?
- We already have...
- 09:44 Support #1782: Make CoCoALib test file for radical
- Can we (= Anna) do this quickly ready for next interim release?
29 Feb 2024
- 15:33 Bug #1749 (Resolved): Configuration hiccups on Mac M1
- CoCoALib now seems to compile without too many hiccups... Will check in shortly.
Not yet tried CoCoA-5
28 Feb 2024
- 21:32 Bug #1749: Configuration hiccups on Mac M1
- Aha! The examples with @wrong output@ are *all examples* which are expected to produce output.
There are two like... - 20:36 Bug #1749 (In Progress): Configuration hiccups on Mac M1
- I have now changed all messages in the checking scripts so that they specify the full path when referring to @LogFile...
- 19:59 Bug #1749: Configuration hiccups on Mac M1
- I'm hoping to sort this out soon... ideally by tomorrow (ha ha!). It seems I've forgotten username/password (sigh). ...
24 Feb 2024
- 18:34 Design #1783: Code & doc structure: one-big-file or many-small-files?
- A brief phone discussion with Anna yesterday suggested a vague preference for many-small-files.
But no genuine reaso... - 18:33 Design #1783 (In Progress): Code & doc structure: one-big-file or many-small-files?
- Thoughts about one-big-file vs many-small-files:
For source code:
* ASSUME many-small-files means many header fil... - 18:32 Design #1783 (In Progress): Code & doc structure: one-big-file or many-small-files?
- I'd like to discuss briefly the pros & cons of many-small-files and one-big-file. Currently the CoCoALib code is a m...
23 Feb 2024
- 12:39 Bug #1579 (Closed): Readexpr/RingElem: unhelpful error message when input is wrong
- Anna Maria Bigatti wrote:
> Still to do: check other cases.
I cannot remember what I meant.
Now seems pretty goo... - 12:29 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- Implement special version for monomial ideals
- 12:28 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- Anna Maria Bigatti wrote:
> there is a new problem (in test-exbugs.C).
> [...]
Fixed, it was an "off-by-one" err... - 12:27 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- there is a new problem (in test-exbugs.C)....
- 12:28 Bug #1779 (Closed): Radical error with lex (again)
- 11:41 Bug #1779: Radical error with lex (again)
- I made a new issue for implementing and running the tests.
Closing this one ... hoping non errors will come from the... - 12:07 Feature #379: Iter for subsets/tuples
- *ANNA* will test this over the next week :-)
- 11:39 Support #1782 (New): Make CoCoALib test file for radical
- There is a file with some CoCoALib tests for radical in a funny format.
Clean it up. - 11:38 Slug #1754 (Closed): IsSqFree poorly implemented
- 11:34 Support #1265 (Closed): Unregistered TXT files in doc
19 Feb 2024
- 21:28 Bug #1661: Microsoft: cannot compile with signal handling
- Winfried sent me the following message by email:...
16 Feb 2024
- 21:31 Feature #1513: Better test for univariate-ness (and better conversion)
- Assuming we do implement this, what should its UI be?
Do we already have a function which converts from @SparsePolyR... - 21:22 Design #1735 (In Progress): PushFront/PushBack without checks?
- I have just tried disabling the checks inside *@PushFront@* and *@PushBack@*. There was no difference when calling @...
- 10:23 Design #1735: PushFront/PushBack without checks?
- Surely worth a try.
@PushFront_nocheck@?
I could imagine cases when this might be used (homomorphisms preserving or... - 10:00 Design #1735: PushFront/PushBack without checks?
- As I stated in the comment just above: I should test whether a non-checking impl would really make it faster. Maybe ...
- 21:05 Bug #1661 (In Progress): Microsoft: cannot compile with signal handling
- Ah, thanks for making me aware of this issue. Actually, recently I put my instructions online for exactly that.
I ha... - 20:54 Bug #1661: Microsoft: cannot compile with signal handling
- I have added Nico Mexis as a watcher. He has successfully built CoCoA-5 for Microsoft, so may have some useful insig...
- 20:53 Feature #1670: Build also dynamic/shared library for CoCoALib?
- Here are some posibly useful links: (I searched for *@libtool tutorial@*
* @https://stackoverflow.com/questions/446... - 20:47 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- I have confirmed that Anna's 0-dim check makes it much faster. I have added a link to issue #1103 which is about pse...
- 16:06 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- John Abbott wrote:
> As far as I can see *@MinPowerInIdeal@* is already implemented, using the method Anna described... - 20:44 Design #1642 (In Progress): interreduce: make monic if over finite field?
- I have made a first impl. Anna is sceptical, partly because the code behaves differently depending on the coefficien...
- 17:02 Design #1642: interreduce: make monic if over finite field?
- The source code seems to be in *@SparsePolyOps-vector.C@* around line 32.
- 10:19 Design #1642: interreduce: make monic if over finite field?
- John Abbott wrote:
> Would we also want to have @interreduced@ work when the coeff ring is @ZZ@?
Not until someon... - 09:42 Design #1642: interreduce: make monic if over finite field?
- Would we also want to have @interreduced@ work when the coeff ring is @ZZ@?
If so, we need to think about the semant... - 18:19 Design #849 (In Progress): Cleanup MinPoly code
- In 8 years we have never really needed the proposed new API, so we may as well *reject* this issue (as Anna suggested...
- 18:05 Feature #813: Implement "elim" in CoCoALib
- The syntax should be compatible with whatever we use for @ElimMat@, I presume.
Well, there is an important differenc... - 18:00 Feature #1763 (Rejected): implement ideal(R) for zero ideal, with no generators?
- No longer needed because @ideal(zero(R))@ now gives ideal in R with no generators.
- 17:51 Slug #1739 (Resolved): IsHomog for ideals
- check if there is a "homog" flag to be set
- 17:41 Feature #645 (Rejected): Automatic mapping of RingElem: user selectable at run-time (GlobalManager?)
- We have auto mapping in many places without any real problems.
If the user disables auto mapping then this may cause... - 17:30 Slug #1394: Oddly slow GBasis computation (slow final cleanup)
- Try...
- 09:55 Feature #1472: Idea for for loops
- While it can be difficult to say much positive about Julia, it does offer a convenient way of using "iterators" (and ...
- 09:46 Bug #1575: DynamicBitset missing arg checks
- There are a few functions whose name has a suffix like *@_NoArgChecks@*.
OK, a quick grep produces just one such pub... - 09:33 Support #1672: Documentation: a good model to follow?
- Here is a list of features it would be nice to offer in the CoCoALib documentation:
* cross-references (xrefs)
* sm... - 09:24 Feature #1748: July 2023
- What is the status of this issue? How much did we achieve?
15 Feb 2024
- 22:35 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- As far as I can see *@MinPowerInIdeal@* is already implemented, using the method Anna described above.
See near line... - 16:41 Slug #1569: IsInRadical too slow (test-RadicalMembership)
- John Abbott wrote:
> The "stupid approach" gets the answer in 10s (on my Linux laptop).
Even faster like this.
<... - 15:32 Design #1647: Suppress zero from ideal generators? Detect 1 and simplify generators?
- Fixed the sum I + ideal(1)
Added check also for I + ideal(x, x-1) (when ideal @HasGBasis@)...
09 Feb 2024
- 10:36 Design #1647: Suppress zero from ideal generators? Detect 1 and simplify generators?
- John Abbott wrote:
> After brief consideration, I have decided to keep in this issue discussion related to what "cle... - 10:13 Design #1647: Suppress zero from ideal generators? Detect 1 and simplify generators?
- I remind you of the function *@IsConstant@* which should be helpful in this case (if IsField(CoeffRing)).
- 10:09 Design #1647: Suppress zero from ideal generators? Detect 1 and simplify generators?
- John Abbott wrote:
> Here is an example where the resulting gens could clearly be cleaned up:
> [...]
This is st... - 10:29 Feature #1206: syz, SyzOfGens: which shifts for zero?
- OK to require that input to *@syz@* are all non-zero.
Also OK for a new fn which accepts zero -- not sure how this s... - 10:03 Feature #1206: syz, SyzOfGens: which shifts for zero?
- Should we make @SyzOfGens@ obsolescent? does it do anything more than calling @syz(gens(I))@?
(apart from fixing th... - 08:51 Feature #1206: syz, SyzOfGens: which shifts for zero?
- This is my suggestion: implement a new function @syz0@ which allows 0s in the input (giving them conventional weights...
- 08:38 Feature #1206 (In Progress): syz, SyzOfGens: which shifts for zero?
- Currently we have decided to forbid generator 0 in ideals (#1647), so @SyzOfGens@ will never find a 0, keeping in min...
08 Feb 2024
- 22:08 Feature #1778 (In Progress): Homogenizer
- I have implemented @homogenizer@ in OSCAR, and am happy with the interface it gives. Also some others are using it, ...
- 21:55 Feature #202: MatrixView/function for viewing a single row or column (RowMat, ColMat)
- What is the status of this issue? With luck we can soon close it!
- 21:51 Support #1687 (In Progress): Release CoCoALib 0.99850
- 21:37 Feature #379 (Feedback): Iter for subsets/tuples
- I have now added a first impl of *@TupleIter@* following the idea behind @SubsetIter@, _i.e._ the tuples are from the...
07 Feb 2024
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