Activity
From 25 Jan 2024 to 23 Feb 2024
23 Feb 2024
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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... -
- Implement special version for monomial ideals
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- Anna Maria Bigatti wrote:
> there is a new problem (in test-exbugs.C).
> [...]
Fixed, it was an "off-by-one" err... -
- there is a new problem (in test-exbugs.C)....
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- 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 :-)
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- There is a file with some CoCoALib tests for radical in a funny format.
Clean it up. -
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19 Feb 2024
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- Winfried sent me the following message by email:...
16 Feb 2024
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- Assuming we do implement this, what should its UI be?
Do we already have a function which converts from @SparsePolyR... -
- I have just tried disabling the checks inside *@PushFront@* and *@PushBack@*. There was no difference when calling @...
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- Surely worth a try.
@PushFront_nocheck@?
I could imagine cases when this might be used (homomorphisms preserving or... -
- As I stated in the comment just above: I should test whether a non-checking impl would really make it faster. Maybe ...
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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... -
- I have added Nico Mexis as a watcher. He has successfully built CoCoA-5 for Microsoft, so may have some useful insig...
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- Here are some posibly useful links: (I searched for *@libtool tutorial@*
* @https://stackoverflow.com/questions/446... -
- 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...
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- John Abbott wrote:
> As far as I can see *@MinPowerInIdeal@* is already implemented, using the method Anna described... -
- I have made a first impl. Anna is sceptical, partly because the code behaves differently depending on the coefficien...
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- The source code seems to be in *@SparsePolyOps-vector.C@* around line 32.
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- John Abbott wrote:
> Would we also want to have @interreduced@ work when the coeff ring is @ZZ@?
Not until someon... -
- Would we also want to have @interreduced@ work when the coeff ring is @ZZ@?
If so, we need to think about the semant... -
- In 8 years we have never really needed the proposed new API, so we may as well *reject* this issue (as Anna suggested...
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- The syntax should be compatible with whatever we use for @ElimMat@, I presume.
Well, there is an important differenc... -
- No longer needed because @ideal(zero(R))@ now gives ideal in R with no generators.
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- check if there is a "homog" flag to be set
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- We have auto mapping in many places without any real problems.
If the user disables auto mapping then this may cause... -
- Try...
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- While it can be difficult to say much positive about Julia, it does offer a convenient way of using "iterators" (and ...
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- There are a few functions whose name has a suffix like *@_NoArgChecks@*.
OK, a quick grep produces just one such pub... -
- Here is a list of features it would be nice to offer in the CoCoALib documentation:
* cross-references (xrefs)
* sm... -
- What is the status of this issue? How much did we achieve?
15 Feb 2024
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- As far as I can see *@MinPowerInIdeal@* is already implemented, using the method Anna described above.
See near line... -
- John Abbott wrote:
> The "stupid approach" gets the answer in 10s (on my Linux laptop).
Even faster like this.
<... -
- Fixed the sum I + ideal(1)
Added check also for I + ideal(x, x-1) (when ideal @HasGBasis@)...
09 Feb 2024
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- John Abbott wrote:
> After brief consideration, I have decided to keep in this issue discussion related to what "cle... -
- I remind you of the function *@IsConstant@* which should be helpful in this case (if IsField(CoeffRing)).
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- John Abbott wrote:
> Here is an example where the resulting gens could clearly be cleaned up:
> [...]
This is st... -
- 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... -
- Should we make @SyzOfGens@ obsolescent? does it do anything more than calling @syz(gens(I))@?
(apart from fixing th... -
- This is my suggestion: implement a new function @syz0@ which allows 0s in the input (giving them conventional weights...
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- Currently we have decided to forbid generator 0 in ideals (#1647), so @SyzOfGens@ will never find a 0, keeping in min...
08 Feb 2024
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- I have implemented @homogenizer@ in OSCAR, and am happy with the interface it gives. Also some others are using it, ...
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- What is the status of this issue? With luck we can soon close it!
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- 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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- Modified ...
06 Feb 2024
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- Anna Maria Bigatti wrote:
> John Abbott wrote:
> > It would be easy to allow the factorize to return a result if th... -
- John Abbott wrote:
> It would be easy to allow the factorize to return a result if the input is a non-zero constant.... -
- Now the test from #1390 is fast (in C++), so I re-activated it.
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- Anna Maria Bigatti wrote:
> It should all go through @myTestIsRadical@, ... and now it isn't (I had forced the funct... -
- The package was first translated by Alice Moallemy, then fixed by Nicolas Jagersma (2023).
Now it's been officially ... -
- Port the code from the CoCoa-5 package radical.cpkg5 into CoCoALib
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- Should we also have that @ideal(zero(R))@ has empty list of generators?
I think so.
And that would be handy, if we ...
05 Feb 2024
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- It would be easy to allow the factorize to return a result if the input is a non-zero constant.
I suppose I made it ... -
- first bug fixed.
New bug:... -
- This problem resurfaced now that radical is in C++....
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- Fixed. Now checking if gens are monomial, then if gens are homogeneous....
03 Feb 2024
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18:10 Bug #1361: Compilation fails when compiling with libgsl
- Hi John, the new version compiles without problems.
02 Feb 2024
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- Here is a list of files which have been checked (so that we do not repeatedly check them):
* @ApproxPts2.C@
* *@END@* -
- The ctor for @homogenizer@ will create the extended polynomial ring.
What properties should this extended ring have?... -
- Following KISS, it is probably best to try the simple interface first.
If it works well, and we like it, then we can... -
- I am not yet sure of the details, but I am hoping that it can be used as in this example:...
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- Here is a suggestion for a cleaner, simpler way to effect homogenization.
The main idea is to create a new type of o... -
- Here is an example where the resulting gens could clearly be cleaned up:...
01 Feb 2024
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- Anna, are you willing to investigate point (1): the implementation behaving cleverly if the term order is wdeg-compat...
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- By Robbiano: No need to allow homogenization by an indet whose degree is not 1.
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- (2) I think we should *not* provide homogenization by an indet whose degree is not 1, because this is not entirely tr...
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- By Kreuzer-Robbiano: *Corollary 4.3.20*. It requires that P is positively graded.
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- @MakeSet@ is OK for CoCoA-5 and *affine points.* In CoCoALib/C++ and/or with projective points it is not so simple.
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- The CoCoA-5 manual already says that the points must be distinct (as a quick reaction to the problem reported by puw...
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- I'm more inclined to suggest @IdealOfPoints(R, MakeSet(pts))@ in the manual, if one wants to allow duplicates. Maybe...
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- Currently we allow any non-negative machine integer as the "verification level", but there is no clear semantics.
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- Could it be useful to have also *@IsHomog3@* which returns a @bool3@?
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- Source is in @SparsePolyOps-ideal.C:908@ more or less
31 Jan 2024
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- There is some non-trivial code in *@MatrixOps-IsZeroDet.C@* developed from a project in Passau...
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- Should we implement this? Or postpone it? Or reject it?
What is most natural?
Is it really a mistake to ask for... -
- I say impl the suggestion in the main description: it should be very little code, and may make some computations fast...
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- Yes, it would be possible to implement this, and perhaps not even too hard. *But why?*
When would it be useful? Is ... -
- Is this still a problem? Maybe we can ask Nico?
25 Jan 2024
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- *SUMMARY*
Offering proper thread-safety is likely trickier than I had hoped, and probably decidedly more costly at r... -
- Anna reported compilation warnings with @clang@:
@std::mutex@ cannot be copied or moved, so attempting to have defau... -
- Still to do: check other cases.
I modified only @ReadExpr(string)@ and @ReadAtom@ (for symbol).
I prefer to documen... -
- I think I improved these error messages (hard to spot in string otherwise):...
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- Here is another test case: @RingElem(R, "y(x)")@
Looks like a function call...
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