CoCoA » CoCoALib

13 Jan 2016

15:41 Feature #839: SparsePolyIter: make more compatible with STL

interesting syntax :-)
looks quite horribly complicated to implement though :-( Anna Maria Bigatti

14:26 Feature #839: SparsePolyIter: make more compatible with STL

Another idea is to have separate iterator types for the coeffs and the PPs; but the problem of not being able to refe... John Abbott

14:23 Feature #839: SparsePolyIter: make more compatible with STL

A possible solution would be to return an "index" which can be converted into a usable value via a memfn of the polyn... John Abbott

14:19 Feature #839: SparsePolyIter: make more compatible with STL

As a quick reminder: the new @for@-loop syntax is like this:... John Abbott

14:11 Feature #839 (In Progress): SparsePolyIter: make more compatible with STL

Mario has suggesting making @SparsePolyIter@ more compatible with C++ (and STL); for instance this would allow use of... John Abbott

11 Jan 2016

15:05 Feature #838: Differential algebra

Werner pointed out that it is (or "can be"?) useful to have an ordering on the derivatives, and that the interesting ... John Abbott

15:00 Feature #838: Differential algebra

More details. My understanding is that there are two types of "variable": independent variables (@x[1]@ to @x[n]@) a... John Abbott

14:16 Feature #838: Differential algebra

Here are some notes following a discussion I had with Werner last week... there may be some mistakes if I have not un... John Abbott

13:43 Feature #838 (In Progress): Differential algebra

Werner has suggested that CoCoA could offer differential algebras.
If I have understood correctly, these are a bit... John Abbott

06 Jan 2016

14:40 Slug #837: factor is very slow on some simple input polynomials

My "fast" machine in Kassel takes more than 60000s for @x^780+780@, and 1333s for @x^988+988@.
In comparison all pol... John Abbott

14:32 Slug #837 (New): factor is very slow on some simple input polynomials

The problem lies in CoCoALib, but for simplicity I present it here as CoCoA-5 code.
@factor(x^780+780)@ is very sl... John Abbott

23 Dec 2015

12:25 Bug #784: threadsafety: Scott Meyers's advice about cached values

I read a bit in Stroustrup C++ book. There I found a method @std::call_once@ (in @<mutex>@). This method could be a n... Mario Albert