CoCoA

31 May 2024

17:07 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

John Abbott wrote:
> Is it worth putting the ex-bug (mentioned in comment 6 above) as a genuine exbug test?
hmmm,... Anna Maria Bigatti

09:42 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

Is it worth putting the ex-bug (mentioned in comment 6 above) as a genuine exbug test?
John Abbott

09:40 CoCoALib Feature #1742: MinGens could be faster

Could we put here a couple of test cases?
I think the "fancy" phrase is "regression testing": make sure the some fut... John Abbott

30 May 2024

17:43 CoCoALib Feature #1819 (In Progress): New functions in CoCoALib using GBasisTrunc: MinSubsetOfGens, IsContainedTrunc, ..

We have in CoCoA-5
+ MinSubsetOfGens
+ IsContainedTrunc(I,J)
using GBasisTrunc (if homogenous and not(HasGBasis(J)... Anna Maria Bigatti

17:38 CoCoALib Bug #1740 (Feedback): MinGens gives non minimal gens *if some deg=0*

Anna Maria Bigatti

17:22 CoCoALib Bug #1740 (Resolved): MinGens gives non minimal gens *if some deg=0*

A clever implementation is difficult/impossible.
However, the new @GBasisTrunc@ (which also works for non-negative g... Anna Maria Bigatti

11:33 CoCoALib Bug #1740: MinGens gives non minimal gens *if some deg=0*

This is how the usual MinGens labelling can go horribly wrong with *non-negative* gradings:
S := NewPolyRingWeight... Anna Maria Bigatti

17:17 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

There was a bug in GBasisTrunc, now fixed.
These functions are in CoCoA-5. Port them to CoCoALib:
+ MinSubsetOfG... Anna Maria Bigatti

11:28 CoCoALib Feature #1742 (Resolved): MinGens could be faster

Resolved using truncation (works also for non-negative gradings) Anna Maria Bigatti

28 May 2024

17:48 CoCoALib Design #1689: Automatic mapping of RHS in += etc

When we multiply or divide a polynomial by a coefficient, we can use myMulByCoeff/myDivByCoeff.
This is actually che... Anna Maria Bigatti

17:41 CoCoALib Design #1689: Automatic mapping of RHS in += etc

Is this valid now? something along this lines is valid. Anna Maria Bigatti

14:39 CoCoALib Design #1744: Implement GBMill (aka Groebner Framework)

First step would be to kill definitely all the code for the dynamic GBasis.
It is sad to do so, but I have no idea h... Anna Maria Bigatti

14:12 CoCoALib Design #1744: Implement GBMill (aka Groebner Framework)

John Abbott wrote:
> *THIS* could be a good goal for version 1.0. Do we have enough resources to achieve that?
I... Anna Maria Bigatti

14:11 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

MinGens now truncates to the max degree of the generators.
Can be considerably faster than before, of course.
Anna Maria Bigatti

14:09 CoCoALib Feature #1743: Implement Truncated GBases for homogeneous input

Implemented.
Meanwhile I made a few tiny changes in the direction of the Framework/Mill.
Tested, seems fine.
Now... Anna Maria Bigatti

27 May 2024

19:27 CoCoALib Design #1744: Implement GBMill (aka Groebner Framework)

*THIS* could be a good goal for version 1.0. Do we have enough resources to achieve that? John Abbott

16:46 CoCoALib Feature #1743 (In Progress): Implement Truncated GBases for homogeneous input

One crucial starting point is making a proper constructor for GRingInfo.
Currently the constructor has many argument... Anna Maria Bigatti

25 May 2024

02:13 CoCoALib Feature #1667: GBasis over ZZ: port to CoCoALib

That is the idea. We just have to understand who will be the authors and what should be done before submitting. I bel... Elisa Palezzato

24 May 2024

16:40 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

John Abbott wrote:
> Anna suggests
> *@[[waiting for ";"]]@*
checked in @LineProviders.C@ Anna Maria Bigatti

16:33 CoCoALib Bug #1740: MinGens gives non minimal gens *if some deg=0*

While trying to understand how to work around this, I resumed the partial minimalization with the function @MinGens_a... Anna Maria Bigatti

14:55 CoCoALib Bug #1705: ProgressReporter: prepare for new loop?

John Abbott wrote:
> Or *@myRestart@*?
@myReset@ is myFavourite ;-) Anna Maria Bigatti

10:13 CoCoALib Bug #1705: ProgressReporter: prepare for new loop?

Or *@myRestart@*?
John Abbott

11:53 CoCoALib Feature #1818 (In Progress): Implement FGLM

Done, together with Evelina Lanteri.
We used LinDepMill and QBGenerator: worked very well.
Still to decide: user in... Anna Maria Bigatti

11:47 CoCoALib Feature #1818 (In Progress): Implement FGLM

Implement FGLM algorithm for 0-dim ideals Anna Maria Bigatti

11:45 CoCoALib Feature #937 (Closed): LinDepMill: Mill for linear dependencies

Many years have passed. This class has been thoroughly used/tested.
It is used in the functions @ShapeLemma@ and @F... Anna Maria Bigatti

10:12 CoCoALib Feature #1667: GBasis over ZZ: port to CoCoALib

John Abbott wrote:
> The CoCoA-5 version is in @*prototype-GBZZ.cpkg5@*.
> I tried just one test, and the CoCoA-5 c... Anna Maria Bigatti

09:49 CoCoALib Feature #1778: Homogenizer

Anna has raised some points to consider (related to the last comment above which creates many poly rings)
* *Qn* eac... John Abbott

09:10 CoCoALib Feature #1817 (In Progress): OSCAR/MaRDI JSON interface

I have made a first throwaway prototype, mostly to learn about the foibles of the OSCAR/MaRDI JSON format.
I am wo... John Abbott

09:08 CoCoALib Feature #1817 (In Progress): OSCAR/MaRDI JSON interface

Build a good first version of an interface for sending/receiving OSCAR/MaRDI JSON serializations of mathematical obje... John Abbott

23 May 2024

21:42 CoCoALib Feature #1778: Homogenizer

Wolfram Decker would like to have a way of handling the rings involved in projective geometry: namely 1 "homogeneous"... John Abbott

21:34 CoCoALib Design #1816 (Feedback): printing rings

I have updated the expected output of 2 @src/tests/@
Thanks for fixing this so quickly!
John Abbott

16:42 CoCoALib Design #1816: printing rings

This is fine for me:... Anna Maria Bigatti

16:39 CoCoALib Design #1816: printing rings

Now it prints... Anna Maria Bigatti

16:36 CoCoALib Design #1816 (Resolved): printing rings

Follow up:
Me: no, we don't.
In fact, this highlights there is a different underlying implementation.
This is no... Anna Maria Bigatti

16:35 CoCoALib Design #1816 (Feedback): printing rings

From email by John Abbott:... Anna Maria Bigatti

20 May 2024

17:12 CoCoALib Feature #1381: Type ideal for ZZ[x[1..n]]

We have GBasis code for poly ideals over ZZ, so make it work with these ideals.
More failing operations:... John Abbott

17:03 CoCoALib Support #1263: Tidy CoCoALib test directory

Can we close this soon? John Abbott

17:01 CoCoALib Slug #1118: SLUG: factorization of x^9999

How to compute the GCD of x^e1 * g1(x^d1) and x^e2 * g2(x^d2)?
Is it just x^min(e1,e2) * gcd(g1(x^D1), g2(x^D2))[x... John Abbott

16:56 CoCoALib Support #262 (In Progress): Play with GIT

I am strongly tempted to postpone this until after we reach version 1.0.
Pros: putting the sources on GitHub (or s... John Abbott

13 May 2024

22:26 CoCoA-5 Design #1508: Initial ring

The actual message is... John Abbott

22:23 CoCoA-5 Design #1508: Initial ring

*(1)* I modified @packages/init.cocoa5@ so that it prints out a message about the initial ring.
This was a *ba... John Abbott

10 May 2024

11:16 CoCoA-5 Design #610 (Closed): Variable It: assign before or after printing

Current behaviour is acceptable (and should still be safe even if we make printing interruptible).
Closing.
John Abbott

11:07 CoCoA-5 Design #1496 (Rejected): Use "special" names for variables inside tests

After brief discussion with Anna: KISS -- it works without problem as is, so don't waste time fixing a problem which... John Abbott

10:50 CoCoA-5 Design #1508: Initial ring

I'm undecided about changing the name (some beginner user might think that the name "QQxyz" has some interpretation b... Anna Maria Bigatti

10:33 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

Anna suggests
*@[[waiting for ";"]]@*
John Abbott

10:30 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

Another suggestion
*@[[incomplete or forgot ";"?]]@*
John Abbott

10:02 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

> How about a very succinct *@[[forgot ";"?]]@*
yes! Anna Maria Bigatti

09 May 2024

20:58 CoCoALib Feature #1778: Homogenizer

The interface in OSCAR lets the caller choose where the "new" indeterminates appear in the list of indets of the bigg... John Abbott

20:46 CoCoALib Feature #1667: GBasis over ZZ: port to CoCoALib

The CoCoA-5 version is in @*prototype-GBZZ.cpkg5@*.
I tried just one test, and the CoCoA-5 code was noticeably faste... John Abbott

10:24 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

Some more thoughts:
* How long may the prompt be?
* For whom is the prompt meant to be useful?
For a complete be... John Abbott

08 May 2024

16:56 CoCoA-5 Support #1603 (Rejected): Unhelpful behaviour in "compatibility mode": double error mesg

John Abbott wrote:
> I'm still with *won't fix* because we have far more important things to do with our time.
> Re... Anna Maria Bigatti

16:53 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

I don't mind the current message, but also... Anna Maria Bigatti

16:49 CoCoA-5 Support #1566 (Closed): What does rad do?

John Abbott wrote:
> There is no *@rad@* function in the current version of CoCoA-5.
> Close?
yes, it was a temp... Anna Maria Bigatti

05 May 2024

21:01 CoCoA-5 Support #1603: Unhelpful behaviour in "compatibility mode": double error mesg

I'm still with *won't fix* because we have far more important things to do with our time.
Reject?
John Abbott

20:57 CoCoA-5 Support #1650: Potentially confusing prompt: waiting for semicolon

It does seem to be hard to find a better prompt without it become too long (and possibly still not covering all cases... John Abbott

20:53 CoCoA-5 Support #1566: What does rad do?

There is no *@rad@* function in the current version of CoCoA-5.
Close?
John Abbott

20:49 CoCoA-5 Slug #1760 (Closed): Quitting can be slow

This has been done for some time. I'm happy enough with the behaviour... no-one else has complained. So closing.
John Abbott

20:44 CoCoA-5 Feature #97: OpenOFile

This issue was opened 12 years ago. Have there been any complaints in that time about the differing behaviour?
Ma... John Abbott

20:17 CoCoA-5 Design #1508: Initial ring

This issue has been dormant for too long. Here is what I now think:
* the initial ring should have a longer name, I... John Abbott

19:53 CoCoA-5 Design #1496: Use "special" names for variables inside tests

I originally created this issue, which superficially seems reasonable.
But now I no longer recall exactly which name... John Abbott

19:45 CoCoA-5 Bug #1746: ManExamples target: need to reset VerbosityLevel

The Control-M character seems to appear where a printed line has had a prefix elided.
It is not serious, but I wou... John Abbott

19:42 CoCoA-5 Design #610: Variable It: assign before or after printing

I am testing the behaviour by computing a large cyclotomic polynomial (without assigning it). Then compute @1+2@ wit... John Abbott

19:39 CoCoA-5 Design #610 (Resolved): Variable It: assign before or after printing

I believe that the relevant spurce code is around @Interpreter.C:4187@ The line I mean is... John Abbott

19:15 CoCoA-5 Bug #1708: Linux: just 1 executable, should be 2 (with & without readline)

Have we made any progress with this?
Maybe it suffices to make a few small changes to the scripts which make the rel... John Abbott

19:12 CoCoA-5 Bug #1634 (In Progress): Unexpected or unhelpful error using GroebnerFanIdeals

This specific problem does not arise on a platform with 64-bit @long@; though no doubt a larger example would eventua... John Abbott

19:03 CoCoA-5 Bug #1435: Disable readline if input is redirected

Here are some possibly useful links:
* *@https://stackoverflow.com/questions/5156675/how-to-use-isatty-on-cout-or-ca... John Abbott

18:54 CoCoA-5 Bug #727 (In Progress): Emacs UI: send-file (C-c C-f) should check if buffer and file are synchronized

Here are some potentially useful links:
* *@https://superuser.com/questions/712237/safely-reload-files-which-are-cha... John Abbott