CoCoA » CoCoALib

31 Oct 2017

15:36 Slug #1105: Primary Decompositon (zero-dim) slow cases

Here are some examples I found lying around in a file:... John Abbott

27 Oct 2017

17:45 Bug #1113 (Closed): gcd crashes (Floating point exception)

In an old file (from 2006) I found two examples where GCD (in CoCoA4) crashes because it runs out of primes; since we... John Abbott

11:53 Design #703: Add more operations between modules (CoCoALib)

Reminder. Add +. Anna Maria Bigatti

25 Oct 2017

13:29 Slug #1110 (Closed): Determinant of matrix over QQ (whose entries are actually integers)

CoCoA-5 can be much faster as computing @det(M)@ if @RingOf(M)@ is @ZZ@ than the same matrix but over the ring @QQ@.
... John Abbott

17 Oct 2017

17:15 Feature #1108 (Resolved): New fn: IsCoprime (whenever gcd makes sense)

I have written a first trivial implementation. Seems to work.
John Abbott

16:50 Feature #1108: New fn: IsCoprime (whenever gcd makes sense)

The fn should be defined when *@gcd@* makes sense (_i.e._ for true GCD domains and @BigInt@).
At the moment I pref... John Abbott

16:48 Feature #1108 (Closed): New fn: IsCoprime (whenever gcd makes sense)

Define a new fn *@IsCoprime@* which is equivalent to *@IsInvertible(gcd(arg1, arg2))@*
JAA thinks it is better to ... John Abbott

15:47 Feature #630 (Feedback): Add graeffe function?

Added code; doc; example.
Also made accessible to CoCoA-5.
John Abbott

04 Oct 2017

13:43 Design #1106 (Closed): Remove READLINE from CoCoALib

CoCoALib does not depend on READLINE.
Change the LDLIBS and CPP flags so that CoCoALib is completely independent of ... John Abbott

02 Oct 2017

14:56 Slug #1105: Primary Decompositon (zero-dim) slow cases

Here are some more examples: each gen here has 4 terms... John Abbott

13:39 Slug #1105: Primary Decompositon (zero-dim) slow cases

The examples were generated by random search printing out successively slower cases.
John Abbott

13:38 Slug #1105 (Closed): Primary Decompositon (zero-dim) slow cases

Here are some cases where @PrimaryDecomposition0@ in CoCoA-5.2.2 is slow:... John Abbott