CoCoA

17 Sep 2020

16:09 CoCoA-5 Bug #1489 (Closed): Unhelpful error message for package followed by identifier (without dollar sign)

The following produces a misleading error message... John Abbott

16:06 CoCoA-5 Feature #1415: thmproving package

Any news about this package?
Can we close this issue quickly and easily? John Abbott

15:59 CoCoA-5 Bug #1294: CoCoA-5 tests may fail even if executed correctly

I have modified the script @RunTests.sh@ so that it first runs CoCoA with an empty input (*@/dev/null@*).
If that pr... John Abbott

16 Sep 2020

16:23 CoCoALib Feature #1488: BuiltIn Interreduce-Function

Might it be useful to sort elements inside the interreduction loop according to a more "sophisticated" ordering: _e.g... John Abbott

15:41 CoCoALib Feature #1488: BuiltIn Interreduce-Function

I have now put my version of the impl in a new file *@SparsePolyOps-interreduce.C@* with corresponding header file.
... John Abbott

14:45 CoCoALib Feature #1488 (In Progress): BuiltIn Interreduce-Function

Here is my revised version of the source code. It could surely be made faster, but this version is relatively simple... John Abbott

15 Sep 2020

15:20 CoCoA-5 Bug #1294 (In Progress): CoCoA-5 tests may fail even if executed correctly

Your comment about a protected variable causing trouble is a good point (albeit also rather abstruse).
We should u... John Abbott

14:35 CoCoA-5 Bug #1294: CoCoA-5 tests may fail even if executed correctly

Yes, I think that would be an improvement, but also only solve the issue partly. Still if for instance @init.cocoa5@ ... Julian Danner

14:06 CoCoALib Feature #1488 (Closed): BuiltIn Interreduce-Function

The function @interreduce@ is implemented in CoCoA-5, and the implementation (@NotBuiltin.cpkg5@) can be translated i... Julian Danner

13:11 CoCoA-5 Feature #1487 (Closed): EOF for OpenIFile

To read a local file one needs to open an input device via @D:=OpenIFile("path_to_file")@ and read it line-by-line vi... Julian Danner

14 Sep 2020

18:19 CoCoA-5 Support #1486: Emacs UI: indentation in a package

JAA is uncertain about this.
On the one hand the "strange" indentation of package variable assignments highlights ... John Abbott

18:16 CoCoA-5 Support #1486 (In Progress): Emacs UI: indentation in a package

Bernhard Andraschko reports the following anomaly.
Inside a package variables are indented, but all other package ... John Abbott

18:11 CoCoALib Feature #1485 (New): Simple syntax for making a quotient ring?

The syntax *@R/I@* would be convenient and easy to read.
At the moment I do not see how it could be "dangerous" un... John Abbott

17:56 CoCoALib Feature #1485 (Resolved): Simple syntax for making a quotient ring?

John Abbott

17:47 CoCoALib Feature #1485 (New): Simple syntax for making a quotient ring?

Should we allow the syntax *@R/I@* to mean the same as *@NewQuotientRing(R,I)@*?
Discuss, and maybe implement.
John Abbott

18:08 CoCoALib Bug #1484 (Resolved): ker bug (quotientinghom for R/ideal())

There are two more suspect creations of ideals: line 325 and 347.
I have changed these too, but am less sure that wh... John Abbott

18:07 CoCoALib Bug #1484: ker bug (quotientinghom for R/ideal())

I have blindly changed the code in @HomomorphismOps.C@.
The problem was in @MakeRichHom@ (and presumably an analogo... John Abbott

17:38 CoCoALib Bug #1484 (Closed): ker bug (quotientinghom for R/ideal())

Bernhard Andraschko reports the following bug:... John Abbott

13:10 CoCoALib Feature #1483 (Feedback): IsPowerOf2 for rationals

Added new function *@IsPowrerOf2@* for @BigRat@. Gives @false@ if arg is not strictly positive.
Impl is simple rath... John Abbott

13:08 CoCoALib Feature #1483 (Closed): IsPowerOf2 for rationals

Add new function *@IsPowerOf2@* for @BigRat@.
It already exists for @BigInt@.
John Abbott

31 Aug 2020

14:56 CoCoALib Feature #1482: Extended rationals: PlusInfinity and MinusInfinity

Maybe the simple approach is to create two new types: *@PlusInfinityType@* and *@MinusInfinityType@*. Then it should... John Abbott

14:48 CoCoALib Feature #1482 (In Progress): Extended rationals: PlusInfinity and MinusInfinity

The doc for GMP states fairly clearly that the rationals @1/0@ and @-1/0@ can be created, but that they may not be pa... John Abbott

14:02 CoCoALib Feature #1482: Extended rationals: PlusInfinity and MinusInfinity

Some notes:
* what type should these values have? *@BigRat@*? Or Maybe *@ExtendedBigRat@*?
* We'd probably need f... John Abbott

13:56 CoCoALib Feature #1482 (In Progress): Extended rationals: PlusInfinity and MinusInfinity

Might we be interested in having representations of *@PlusInfinity@* and *@MinusInfinty@*?
This could be useful fo... John Abbott

14:34 CoCoALib Feature #1176: interval arithmetic

There is a GNU package called MPRIA (multiple precision rational interval arithmetic). It is GPL v3.
It seems not t... John Abbott

28 Aug 2020

15:40 CoCoALib Support #1481: Release CoCoALib 0.99800

Summary of main changes:
* *changed @BigRat@ ctors*: it is now possible to construct @BigRat@ directly from an integ... John Abbott

15:39 CoCoALib Support #1481 (Closed): Release CoCoALib 0.99800

Everything related to making a CoCoALib release:

* Redmine Roadmap: close or postpone issue
* Redmine Release... John Abbott

13:47 CoCoALib Support #1196 (In Progress): Split MatrixOps

For "other reasons" I have split off the code related to computing determinants: this code is now in *@MatrixOps-det.... John Abbott