Activity

From 19 Sep 2017 to 18 Oct 2017

17:15 CoCoALib Feature #1108 (Resolved): New fn: IsCoprime (whenever gcd makes sense): I have written a first trivial implementation. Seems to work.
John Abbott
16:50 CoCoALib 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 CoCoALib 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 CoCoALib Feature #630 (Feedback): Add graeffe function?: Added code; doc; example.
Also made accessible to CoCoA-5.
John Abbott

16:54 CoCoA-5 Feature #1107: CoCoA Online: install (using InteractiveShell): First hard work: install properly vagrant.
(with the help of Alessandro Cartatone) Anna Maria Bigatti
16:49 CoCoA-5 Feature #1107 (New): CoCoA Online: install (using InteractiveShell): install CoCoA Online (using InteractiveShell)
Anna Maria Bigatti

15:23 CoCoA-5 Support #977: "universal denominator" (related with GroebnerFanIdeals): John Abbott wrote:
> JAA prefers INT to RINGELEM (at least for the moment).
OK, I'll change it back.
> If the co... Anna Maria Bigatti
15:19 CoCoA-5 Support #977: "universal denominator" (related with GroebnerFanIdeals): JAA prefers INT to RINGELEM (at least for the moment).
If the coeff ring is not QQ but is FracField then I'm not s... John Abbott
12:53 CoCoA-5 Support #977: "universal denominator" (related with GroebnerFanIdeals): Should @UniversalDenominator@ return @INT@ or @RingElem@?
We should also choose its name: @UniversalDen@?
Current... Anna Maria Bigatti

10:21 CoCoA-5 Slug #907: ApproxSolve very slow on this example: This is another example where @ApproxSolve@ is too slow (in CoCoA-5.2.2).
The example came from "playing with" palin... John Abbott

13:43 CoCoALib 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

14:56 CoCoALib Slug #1105: Primary Decompositon (zero-dim) slow cases: Here are some more examples: each gen here has 4 terms... John Abbott
13:39 CoCoALib Slug #1105: Primary Decompositon (zero-dim) slow cases: The examples were generated by random search printing out successively slower cases.
John Abbott
13:38 CoCoALib Slug #1105 (Closed): Primary Decompositon (zero-dim) slow cases: Here are some cases where @PrimaryDecomposition0@ in CoCoA-5.2.2 is slow:... John Abbott
13:30 CoCoA-5 Feature #731 (In Progress): Primary Decomposition in CoCoA-5: PD for 0-dim ideals has been implemented (see issue #845)
John Abbott

17:22 CoCoA-5 Slug #948: radical is slow (compared to singular) on these examples: Singular appears not to compute a GBasis for the radical.
For instance, in the first example in comment 11, Singul... John Abbott

14:30 CoCoALib Feature #1035 (Feedback): Improvement: how to sort QuotientBasis?: I have just moved the impl from @CoCoALibSupplement.C@ (what was it doing there?!?) to @SparsePolyRing.C@
There is... John Abbott

18:00 CoCoA-5 Design #476 (In Progress): Review utility of package IO: Indeed some form of "folded" printing could be useful for large outputs (especially inside emacs which has problems w... John Abbott
14:42 CoCoA-5 Bug #1104 (In Progress): Eigenvectors: inconsistent return type: From the manual for *@eigenvectors@*:... John Abbott
14:30 CoCoA-5 Slug #948: radical is slow (compared to singular) on these examples: I have noticed that when I interrupt the very long radical computations the interpreter indicates that it was computi... John Abbott

23:12 CoCoALib Feature #1103: Pseudo-zero-dim ideals: Here is an example where it would be faster to recognize that the ideal is 0-dim in an "obvious subring":... John Abbott
14:34 CoCoALib Feature #1103 (In Progress): Pseudo-zero-dim ideals: We have several functions which work well for 0-dim ideals but which give "Not yet implemented" for non-0-dim ideals.... John Abbott
17:21 CoCoA-5 Slug #948: radical is slow (compared to singular) on these examples: Here is another slow example: (about 450s on my computer)... John Abbott
14:43 CoCoA-5 Slug #948: radical is slow (compared to singular) on these examples: I have just tried the last example (916s) from the comment above modulo 32003 and modulo 29641. The computation was ... John Abbott
14:27 CoCoA-5 Slug #948 (In Progress): radical is slow (compared to singular) on these examples: Here are some examples of zero-dim ideals where radical is slow:... John Abbott

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