Activity

From 10 Sep 2017 to 09 Oct 2017

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

18:28 CoCoALib Feature #1102: Implement RootBound: Added example, test, documentation. Checked in.
How did it take me this long???
John Abbott
15:11 CoCoALib Feature #1102 (Feedback): Implement RootBound: I have implemented *@RootBound@* from scratch following what I wrote in "Bound on Factors in ZZ[x]".
John Abbott
15:10 CoCoALib Feature #1102 (Closed): Implement RootBound: Translate the CoCoA-5 *@RootBound@* function into C++. John Abbott

17:03 CoCoALib Bug #1101: Bug in MinPolyModular (insufficient rational reconstruction): JAA has added @test-MinPoly1.C@ including the 3 examples listed here.
Checking in now.
John Abbott
12:23 CoCoALib Bug #1101: Bug in MinPolyModular (insufficient rational reconstruction): Here are some more examples which the computer found during the night:... John Abbott
13:43 CoCoA-5 Bug #1100: PrimaryDecomposition0: says not 0-dim but IsZeroDim says ideal is zero-dim!: Here is a zero-dim ideal with primdecomp having 32 components:... John Abbott
12:20 CoCoA-5 Bug #1100: PrimaryDecomposition0: says not 0-dim but IsZeroDim says ideal is zero-dim!: Anna: have you added the example(s) as a tests cases in the CoCoA test suite?
John Abbott

19:19 CoCoA-5 Bug #1100 (Feedback): PrimaryDecomposition0: says not 0-dim but IsZeroDim says ideal is zero-dim!: Fixed: was a problem in @MinPolyModular@.
Anna Maria Bigatti
18:40 CoCoA-5 Bug #1100: PrimaryDecomposition0: says not 0-dim but IsZeroDim says ideal is zero-dim!: Found it: we knew it could happen, and this is the first time I see it!
The modular reconstruction gives the wrong... Anna Maria Bigatti
18:21 CoCoA-5 Bug #1100: PrimaryDecomposition0: says not 0-dim but IsZeroDim says ideal is zero-dim!: With SetVerbosity(90) it appears that down in the recursion it get an ideal=(1).
Investigating (should never happen!)
Anna Maria Bigatti
14:39 CoCoA-5 Bug #1100 (Closed): PrimaryDecomposition0: says not 0-dim but IsZeroDim says ideal is zero-dim!: Bug summarized in this transcript... John Abbott
19:16 CoCoALib Bug #1101 (Resolved): Bug in MinPolyModular (insufficient rational reconstruction): Fixed. I implemented a Horner evaluation in @MinPoly.C@ which may be improved, and maybe moved into some other file ... Anna Maria Bigatti
19:11 CoCoALib Bug #1101: Bug in MinPolyModular (insufficient rational reconstruction): Adding Horner evaluation to check minpoly correct reconstruction.
Anna Maria Bigatti
19:10 CoCoALib Bug #1101 (Closed): Bug in MinPolyModular (insufficient rational reconstruction): Rational reconstruction succeeds "too early"... Anna Maria Bigatti

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