CoCoA

30 Oct 2013

21:43 CoCoALib Feature #342: Remove denominators: QQ[x] -> ZZ[x] (and PushBack(coeff, PP))

I, too, favour proposal (1):
* it is far simpler to implement
* it is simple to understand the restriction
* it shoul... John Abbott

19:04 CoCoALib Feature #342: Remove denominators: QQ[x] -> ZZ[x] (and PushBack(coeff, PP))

Dear Anna,
I agree that (1) is the better choice. Given that PushBack copies the exponent vector, I think it is th... Winfried Bruns

18:50 CoCoALib Feature #342 (In Progress): Remove denominators: QQ[x] -> ZZ[x] (and PushBack(coeff, PP))

Winfried Bruns wrote:
> In my version of QQ[x] -> Z[x] I am using PushBack to build the target polynomial (also for ... Anna Maria Bigatti

13:32 CoCoALib Feature #342: Remove denominators: QQ[x] -> ZZ[x] (and PushBack(coeff, PP))

This is the first i am using redmine actively.
In my version of QQ[x] -> Z[x] I am using PushBack to build the tar... Winfried Bruns

10:52 CoCoALib Bug #355 (Closed): Colon of zero ideal fails (zero-divisors)

Anna Maria Bigatti

10:05 CoCoALib Bug #355: Colon of zero ideal fails (zero-divisors)

all fixed (it didn't like to have a 0 in the divisor's generators).
Meanwhile @IsZeroDivisor@ has been implemented a... Anna Maria Bigatti

29 Oct 2013

15:35 CoCoALib Feature #150: RingOf rather than owner? (and than AmbientRing, ...)

*POSSIBLE DISADVANTAGE* Using names such as @RingOf@, @PPMOf@ (rather than having a single name) could make template ... John Abbott

14:48 CoCoALib Feature #356 (Closed): IsZeroDivisor

... Anna Maria Bigatti

14:30 CoCoALib Feature #390 (Closed): Store unique copy of QQ[t_1..t_n] (RingQQt) in GlobalManager

Anna Maria Bigatti

14:25 CoCoALib Bug #178 (Closed): IsHomog: should it throw an error when there is no grading?

Anna Maria Bigatti

13:50 CoCoALib Feature #312: LongRange(a,b) returning vector of long a..b (included)

John Abbott wrote:
> It might be worth moving the impl into its own *separate file*: this would remove the need to i... Anna Maria Bigatti

13:45 CoCoALib Feature #215 (Feedback): Janet Bases: check and include code in CoCoALib (first prototype)

The general task is fully done.
Yet to do: add JB field in ideal in cocoalib, and consequent functions in cocoa-5 Anna Maria Bigatti

13:39 CoCoALib Bug #349 (Closed): IdealOfPoints: gens are actually a GBasis

Anna Maria Bigatti

13:33 CoCoALib Bug #335 (Closed): Equality of (sub)modules

Anna Maria Bigatti

13:28 CoCoALib Design #411 (Feedback): design of factorization template class

Anna Maria Bigatti

28 Oct 2013

14:04 CoCoA-5 Bug #32 (Feedback): Elim(t, I)

done, tested, documented Anna Maria Bigatti

26 Oct 2013

00:40 CoCoA-5 Design #412 (In Progress): intersection (all lower case)

CoCoA5 manual is confusing about @intersect@ and @Intersection@.
Rectify!
John Abbott

21:31 CoCoA-5 Design #412: intersection (all lower case)

In CoCoALib we have *@intersect@*, so we have the same name in CoCoA-5.
I set *@Intersection@* just for backward com... Anna Maria Bigatti

25 Oct 2013

22:50 CoCoA-5 Design #412 (In Progress): intersection (all lower case)

CoCoA-5 has @Intersection@ but not @intersection@.
Should we change the name?
John Abbott

22:47 CoCoA-5 Bug #32: Elim(t, I)

Not really related to original problem but...... John Abbott

22:36 CoCoA-5 Bug #279: Bug in Radical (actually a RingHom problem)

Here are two more problem cases with @radical@... John Abbott

24 Oct 2013

14:56 CoCoALib Design #411: design of factorization template class

> Currently JAA prefers method (A) because:
> # it's already impl'ed, so no extra work needed
> # it is easier to u... Anna Maria Bigatti

23 Oct 2013

21:44 Bug #402 (Closed): Problem with 64-bit BOOST on Linux (Werner)

The matter was finally resolved via Skype -- an extra complication arose because Werner had an "anomalous" multiple i... John Abbott

20:50 CoCoALib Feature #39 (Feedback): Squarefree factorization

The issue has been resolved by implementing Bernardin's algm (which seems to work quite well in practice).
The code ... John Abbott

20:46 CoCoALib Feature #42 (Closed): Squarefree factorization - generic case

Not sure how good an idea it is to have the generic fn.
Anyway there is already @SqfreeFactor_generic@.
Closing t... John Abbott

20:41 CoCoALib Feature #40 (Closed): Squarefree factorization - Alessio d'Ali`

JAA has now ported d'Ali's code into CoCoALib (and added doc & tests).
Closing this issue.
John Abbott

20:37 CoCoALib Feature #41 (Closed): Squarefree factorization - overhead

Task is essentially finished now that d'Ali's code has been ported.
Closing.
John Abbott

20:34 CoCoALib Feature #43 (Closed): Squarefree factorization - for polynomials

This entire task subtree was effectively resolved by the porting of d'Ali's impl of Bernardin's algm (see #47).
Th... John Abbott

20:31 CoCoALib Feature #44 (Closed): Squarefree factorization - univariate polynomials

The multivariate code (port of d'Ali's impl of Bernardin's algm) also handles the univariate case, and seems to be fa... John Abbott

20:26 CoCoALib Feature #45 (Closed): Squarefree factorization - univariate polynomials, char 0

This is effectively covered by the port of d'Ali's impl of Bernardin's (multivariate) algm. Efficiency of the multiv... John Abbott

20:23 CoCoALib Feature #46 (Closed): Squarefree factorization - univariate polynomials, char p > 0

This task is already handled by the port of d'Ali's impl of Bernardin's algm.
John Abbott

20:10 CoCoALib Feature #48 (Closed): Squarefree factorization - multivariate polynomials, char 0

This case is effectively covered by the porting of d'Ali's code.
Might still need some tweaking to handle "strange... John Abbott

20:06 CoCoALib Feature #49 (Closed): Squarefree factorization - multivariate polynomials, char p > 0

This case is already dealt with by the porting of d'Ali's code (see #47).
John Abbott

15:32 CoCoALib Feature #47: Squarefree factorization - multivariate polynomials

Translation of d'Ali's impl is now complete.
Code has been checked in; incl doc and tests.
Some minor points remain ... John Abbott

14:42 CoCoALib Design #411 (In Progress): design of factorization template class

Once this matter is resolved, we can change the file @TmpFactor@ into @factor@; strictly the @Tmp@ prefix should have... John Abbott

14:28 CoCoALib Design #411: design of factorization template class

This question arose because I have just implemented @SqfreeFactor@, and thought that it might be nice to guarantee th... John Abbott

12:54 CoCoALib Design #411 (Closed): design of factorization template class

Which is the better of the following two ways of implementing the factorization class?
(A) the current impl
* rec... John Abbott

12:42 CoCoALib Support #391 (In Progress): Check consistency of template class factorization

I noticed yesterday that there is a fn @ourCheckConsistency@ for factorizations.
This probably does what is needed -... John Abbott

20 Oct 2013

14:49 CoCoALib Feature #47 (In Progress): Squarefree factorization - multivariate polynomials

JAA is translating Alessio D'Ali's impl (in CoCoA5) into C++.
Most of the translation is complete, but it does not... John Abbott

18 Oct 2013

20:38 CoCoALib Feature #407: RingElem ctor from mpz_t (from Bruns)

I have an initial implementation. CoCoALib compiles, but there are _compilation_ problems in the tests. The problem... John Abbott

16:37 CoCoALib Feature #407: RingElem ctor from mpz_t (from Bruns)

Should there also be assignment of @RingElem@ values from @mpz_t@ and @mpq_t@?
NOTE: a simple (but inefficient) impl... John Abbott

16:32 CoCoALib Design #410 (Closed): New file: BigRatOps

Should @BigRat@ be split into the type defn and a separate @BigRatOps@?
Why is @IntOperations@ not called @BigIntO... John Abbott

17 Oct 2013

08:30 CoCoALib Feature #409 (New): Minimal syzygies (optimized implementation)

As a first step towards a good implementation of @resolution@ in CoCoALib, implement optimized @MinSyz@.
(Naive vers... Anna Maria Bigatti

16 Oct 2013

16:33 Bug #402 (Feedback): Problem with 64-bit BOOST on Linux (Werner)

There was one true (design) error: I have now modified @configure@ and @fixed_part2@ so that they are now sensible/co... John Abbott

15 Oct 2013

14:31 CoCoALib Design #408 (Closed): Rename MatrixArith to MatrixOperations

Following the name @IntOperations@ it seems better to use the name @MatrixOperations@ rather than the actual @MatrixA... John Abbott

14 Oct 2013

12:05 CoCoALib Feature #407 (In Progress): RingElem ctor from mpz_t (from Bruns)

Pros and cons
Pros:
* the proposed ctors would make it easier to use CoCoALib features from software which already u... John Abbott

11:51 Bug #402: Problem with 64-bit BOOST on Linux (Werner)

Werner reports that a quick check suggests that my hack works. John Abbott