CoCoA

29 Aug 2019

14:55 CoCoALib Feature #1227: exgcd; solve Bezout equation

An exgcd function would be very useful.
It is used in computing the Hermite normal form (#1304) and in computing Gr... Florian Walsh

14:43 CoCoA-5 Feature #1304 (New): Hermite normal form

I created a prototype implementation for computing the Hermite normal form and for solving linear systems over the in... Florian Walsh

12:17 CoCoA-5 Feature #1272: Groebner Bases over ZZ

Changes to the previous version:
- some code cleanup
- fix bug in the ExtendedGBoverZZ function
- add functions Is... Florian Walsh

27 Aug 2019

11:09 CoCoA-5 Bug #1303 (Rejected): Manual looking for "?"

CoCoA's behaviour on the following inputs is a bit unexpected:... John Abbott

11:05 CoCoA-5 Bug #1261 (Feedback): ASCII function

No reaction in the last 5 months; did Anna test the code (and check it in)?
Moving to feedback.
John Abbott

02 Aug 2019

22:43 CoCoALib Slug #1302 (Rejected): Factorization mod p

My fault! The factorization is actually rather fast (since it is mostly a square-free decomposition). The slow part... John Abbott

14:14 CoCoALib Slug #1302 (Rejected): Factorization mod p

CoCoALib took longer than expected to factorize *@x^11009 - 2@* modulo 109 (or was it 101?)
Anyway, @11009 = 101*109... John Abbott

31 Jul 2019

16:40 CoCoALib Feature #1301 (Feedback): New function primorial

I have implemented it: the real work is done by GMP.
Added doc; accessible from CoCoA-5. No test/example.
John Abbott

16:39 CoCoALib Feature #1301 (Closed): New function primorial

Add a new function *@primorial@*, the product of al primes up to a given limit.
John Abbott

11:04 CoCoALib Bug #1300 (Feedback): CoprimeFactorBasis: mishandles negative args

Fixed. I'll add some tests.
John Abbott

11:03 CoCoALib Bug #1300 (Closed): CoprimeFactorBasis: mishandles negative args

@CoprimeFactorBasis@ gives wrong answers when args are negative. Here is a simple example in CoCoA-5... John Abbott