CoCoA » CoCoALib

09 Apr 2015

21:46 Feature #678: Accumulator (like a geobucket)

Note: perhaps also consider the design of C++ @std::accumulate@? Is there anything in BOOST?
My (vague) idea is t... John Abbott

21:36 Feature #678: Accumulator (like a geobucket)

I have just written @DetDirect@ which computes the sum of many terms (one for each permutation). In order to get dec... John Abbott

21:30 Feature #678 (In Progress): Accumulator (like a geobucket)

Consider creating a general "accumulator" for ring elems, a sort of generalization of a geobucket. John Abbott

02 Apr 2015

17:53 Support #676 (In Progress): Credits to CoCoALib contributors

If we want (and we want) to attract contributions we need to find a proper way to give them credits for their work, a... Anna Maria Bigatti

28 Mar 2015

09:18 Slug #675: Matrix determinant over multivariate poly ring

In my specific instance the direct algorithm (as alternating sum of products) would be best.
The problem with mult... John Abbott

09:16 Slug #675 (In Progress): Matrix determinant over multivariate poly ring

CoCoA can be too slow and require too much RAM for computing determinant of a matrix of multivariate polynomials.
... John Abbott

26 Mar 2015

11:53 Bug #15: Adjoint of a non-invertible matrix

I am planning to implement a direct algorithm: each entry in the @adj@ is just a determinant, and each determinant is... John Abbott

25 Mar 2015

15:59 Bug #15: Adjoint of a non-invertible matrix

Even @AdjByDetOfMinors@ takes too long for a 6x6 matrix of distinct indets. Why?
*2015-03-26 NOTE* I think the prob... John Abbott

15:22 Bug #15: Adjoint of a non-invertible matrix

@adj@ is a very simple function: it chooses between @AdjByDetOfMinors@ and @AdjByInverse@.
What do you think @AdjB... John Abbott

14:52 Bug #15 (In Progress): Adjoint of a non-invertible matrix

I do not recall when, but @adj@ has aleady been added to CoCoALib.
It has a *VERY BAD SLUG*: even after several mi... John Abbott