Activity
From 13 May 2017 to 11 Jun 2017
07 Jun 2017
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15:19 CoCoA-5 Feature #1011: Random seed fn
- In the manual page I have given a simplistic example of calling @reseed@ with an argument which varies with the time:...
23 May 2017
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11:32 CoCoALib Slug #1049: GroebnerFan: slow examples
- Having 4 indets makes it easy to find "big" examples:...
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08:46 CoCoA-5 Design #1075: LaTeX package: power-product printing
- I would define @space@ to the empty string if @[1] = MakeSet([ len(IndetName(X)) | X in indets(R) ]);@
(or some si... -
08:36 CoCoA-5 Bug #1062: IsRadical bug?
- John Abbott wrote:
> Does your test of @saturate@ in @anna.cocoa5@ compute a saturation with twin-float coeffs??
...
22 May 2017
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23:29 CoCoA-5 Design #1075: LaTeX package: power-product printing
- Since CoCoA-5 allows indets with long names, I wanted to revise @LaTeX.cpkg5@ so that the product @x*y@ looks differe...
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23:22 CoCoA-5 Design #1075 (Closed): LaTeX package: power-product printing
- I have just checked in a revised version of the LaTeX package:
* revised spacing between indets in a power-product (... -
22:44 CoCoA-5 Support #1074: CoCoAManual: entry for radical
- The following output is surprising (though correct)...
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22:43 CoCoA-5 Support #1074 (Closed): CoCoAManual: entry for radical
- The CoCoAManual entry for @radical@ looks to be out of date.
It does not mention @radical(RINGELEM)@ and also stat... -
22:41 CoCoA-5 Bug #1062: IsRadical bug?
- Does your test of @saturate@ in @anna.cocoa5@ compute a saturation with twin-float coeffs??
I think you might want t... -
14:57 CoCoA-5 Feature #1073: RelNotes: current version or all previous versions?
- John Abbott wrote:
> A simple, backward-compatible solution would be to allow @Relnotes@ to accept 0 or 1 args. Wit... -
14:18 CoCoA-5 Feature #1073: RelNotes: current version or all previous versions?
- A simple, backward-compatible solution would be to allow @Relnotes@ to accept 0 or 1 args. With 0 args it prints out...
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14:14 CoCoA-5 Feature #1073 (Closed): RelNotes: current version or all previous versions?
- Currently @RelNotes()@ prints out the release notes for all previous versions of CoCoA-5.
I think it could be help... -
14:45 CoCoALib Feature #813 (In Progress): Implement "elim" in CoCoALib
- John Abbott wrote:
> I do not understand: "closed" but progress is 10%.
> Also your last comment suggests that ther... -
14:24 CoCoALib Feature #813: Implement "elim" in CoCoALib
- I do not understand: "closed" but progress is 10%.
Also your last comment suggests that there is still some design i... -
14:10 CoCoALib Feature #813 (Closed): Implement "elim" in CoCoALib
- There is @myElim@. Maybe I meant making a _function_?
Easy, anyway.
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13:52 CoCoALib Feature #979: SmallestNonDivisor -- new fn
- While preparing an example of a simple ideal with a big "universal denominator" I encountered a number with about 330...
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10:45 CoCoA-5 Support #1071: LinKerBasis is user-unfriendly
- @LinKerBasis@ is the "sloppy" version of @LinKer@ (which only takes a MAT, returns a MAT).
We added LIST of linear...
19 May 2017
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15:55 CoCoALib Slug #1049: GroebnerFan: slow examples
- ...
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11:55 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- I just removed the coefficients to John's last example:...
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11:48 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Just to clarify: this means that one cannot create this ring, hmmmmm.......
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11:45 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Here is another "slightly smaller" matrix whose determinant is zero mod 32749:...
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11:16 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Here is another example which gives trouble:...
18 May 2017
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22:03 CoCoA-5 Feature #1072: syz: apply to ModuleElem?
- Is it right that @syz@ should give error if one of the coords is zero?...
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21:59 CoCoA-5 Feature #1072: syz: apply to ModuleElem?
- The man page still calls th fn @Syz@ with a capital @S@; it should be @syz@, shouldn't it?
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21:57 CoCoA-5 Feature #1072: syz: apply to ModuleElem?
- The current solution is to do the following:...
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21:55 CoCoA-5 Feature #1072 (Rejected): syz: apply to ModuleElem?
- Would it make sense to allow @syz@ to be applied to a @ModuleElem@?...
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21:50 CoCoA-5 Support #1071: LinKerBasis is user-unfriendly
- Should the manual page for @LinKerBasis@ also refer to the page for @syz@?
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21:49 CoCoA-5 Support #1071: LinKerBasis is user-unfriendly
- I am not sure what is happening here:...
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21:46 CoCoA-5 Support #1071: LinKerBasis is user-unfriendly
- The version that takes a list gives an unhelpful error when one component is zero:...
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21:40 CoCoA-5 Support #1071 (In Progress): LinKerBasis is user-unfriendly
- What is @LinKerBasis@ supposed to do when given a list?...
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21:31 CoCoA-5 Support #1071: LinKerBasis is user-unfriendly
- This is an unfriendly error message:...
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21:29 CoCoA-5 Support #1071 (In Progress): LinKerBasis is user-unfriendly
- The CoCoA-5 function @LinKerBasis@ produces unhelpful error messages, and too many of them!
Part of the problem ma... -
21:00 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Here are some order matrices with not-too-big entries whose det is a multiple of 32749:...
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08:16 CoCoA-5 Bug #1062 (Feedback): IsRadical bug?
- added tests. CVS-ed
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07:58 CoCoA-5 Bug #1062: IsRadical bug?
- Found it in @TmpGOperations.C@:
Saturation by @ideal(f)@ calls @factor(f)@ and wrongly assumes that the factor list ... -
07:40 CoCoA-5 Bug #1062: IsRadical bug?
- Bug (radical >0 dim) trapped by Elisa Palezzato...
17 May 2017
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18:02 CoCoALib Slug #1057: Slug: Polynomial ring contructor slow with (big) matrix ordering
- ...
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10:39 CoCoALib Slug #1057 (In Progress): Slug: Polynomial ring contructor slow with (big) matrix ordering
- First problem found: @NewOrdvArith(ord)@ ic computed twice.
If @ord@ is defined by M, then many checks are done on M. -
15:52 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- John Abbott wrote:
> Another approach would be to persuade GFan to produce matrices with smaller entries... this is ... -
15:46 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Another approach would be to persuade GFan to produce matrices with smaller entries... this is probably not so easy!
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15:45 CoCoALib Bug #1069 (In Progress): GroebnerFan: ERROR: Matrix must be invertible
- The correct solution would be to have a proper implementation of matrix orderings without any "tricks" (too bad if it...
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15:39 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- John Abbott wrote:
> Here is a guess as to what the problem is... for matrix orderings there was some "funny trick" ... -
15:18 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Here is a guess as to what the problem is... for matrix orderings there was some "funny trick" using a matrix reduced...
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15:09 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Another smaller example (but not as small as Anna's)...
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14:29 CoCoALib Bug #1069: GroebnerFan: ERROR: Matrix must be invertible
- Smaller example, but still too big...
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11:37 CoCoALib Bug #1069 (In Progress): GroebnerFan: ERROR: Matrix must be invertible
- The following causes an error:...
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13:47 CoCoALib Slug #1070: Slug: MakeTermOrd (rk calls in RemoveRedundantRows)
- I just implemented a workaround:
I check det(M) before calling @RemoveRedundantRows@, if not 0 return M.
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13:45 CoCoALib Slug #1070 (New): Slug: MakeTermOrd (rk calls in RemoveRedundantRows)
- The function @RemoveRedundantRows@ is quite slow because of the repeated calls to @rk@.
I had thought it was not imp... -
13:40 CoCoALib Design #854: Function MakeTermOrd should be renamed MakeTermOrdMat?
- Now I'm more inclined to keep @MakeTermOrd@ for CoCoA-5.
Possibly make a distinction in CoCoALib (where mat and ord ... -
11:40 CoCoA-5 Slug #1068: PolyRing constructor: NewOrdvArith computed twice
- OK, Anna; take a look.
I'm a bit busy with other things right now.
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11:33 CoCoA-5 Slug #1068: PolyRing constructor: NewOrdvArith computed twice
- Anna Maria Bigatti wrote:
> It would be handy to get the OrdvArith from a PPMonoid (if possible).
If John allows ... -
11:19 CoCoA-5 Slug #1068 (In Progress): PolyRing constructor: NewOrdvArith computed twice
- It would be handy to get the OrdvArith from a PPMonoid (if possible).
This could also be used internally by the GBas... -
10:35 CoCoA-5 Slug #1068 (In Progress): PolyRing constructor: NewOrdvArith computed twice
- We never considered that a slow ring constructor could be a problem, but may be.
In particular this bit of code:
<p... -
08:30 CoCoA-5 Bug #946: Function "ideal" evaluates the argument twice
- I made a test: "bug-EvalTwice.cocoa5" where we can collect all cases we meet, solved or unsolved.
16 May 2017
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18:07 CoCoA-5 Bug #946 (Resolved): Function "ideal" evaluates the argument twice
- Found it! (and fixed most of them)
The problem is when using the hand functions @EvalArgAsT1OrT2..<..>(ARG(0), whic... -
17:22 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- John Abbott wrote:
> Why do you want to specify @lo@ and @hi@ for @RandomLinearForm@?
> Is it not enough to specify... -
15:32 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- Why do you want to specify @lo@ and @hi@ for @RandomLinearForm@?
Is it not enough to specify a single value N and us... -
15:21 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- John Abbott wrote:
> There is a commented out fn called @RandomLinearForm@ in @experimental.cpkg5@.
That's a kind... -
15:06 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- John Abbott wrote:
> But what about @BackwardCompatible.cpkg5@? How does it differ from @obsolescent.cpkg5@?
Und... -
13:20 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- There is a commented out fn called @RandomLinearForm@ in @experimental.cpkg5@.
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11:35 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- There is also an undocumented fn called *@Rand@* in @misc.cpkg5@.
Should it be made obsolete? Or simply eliminated?... -
14:49 CoCoA-5 Design #943 (In Progress): Managing credits
- The function *@ExternalLibs()@* does not work properly. It must be fixed using the new CoCoALib fn.
15 May 2017
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12:31 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- OK, I'll do it and check in tomorrow -- too busy today.
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11:46 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- ok, you convinced me: let's declare Randomize(d) obsolete, and make (in case) explicit functions for random things.
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11:17 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- We could create: @RandomLinearForm(P,100)@ or even @RandomLinearForm(P)@ if coeff ring is finite field.
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10:59 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- @L := DensePoly(P,1); randomized(L, -100,100);@ is a nice way to make lots of random linear forms.
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10:36 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- I thought @Randomize@ in CoCoA-4 would work only for polynomials (and integers). Did it also work for matrices?
K... -
07:48 CoCoA-5 Design #1067: "Randomize" and "Randomized" obsolete?
- I sometimes miss old @Randomized@.
I suggest implementing it, but with explicit range: @randomized(f, 100);@ random... -
12:28 CoCoALib Slug #1049: GroebnerFan: slow examples
- Here are two deg 5 binomial examples:...
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10:40 CoCoALib Slug #1049: GroebnerFan: slow examples
- Here are some binomial examples of deg 4:...
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12:16 CoCoALib Bug #1064: Bug in MinPolyModular (ugly prime)
- Changed the code so that ugly primes are detected cleanly from checking divisibility, instead of using try/catch. Ad...
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10:25 CoCoA-5 Support #1027 (In Progress): CoCoAManual: add a page with some emacs hints?
- I suggest as a first version of the man page just to put in a reference to the website; not ideal, but better than no...
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09:13 CoCoA-5 Support #1027: CoCoAManual: add a page with some emacs hints?
- Currently there is a web page (I've just improved it a bit).
http://cocoa.dima.unige.it/download/screenshots.shtml
...
14 May 2017
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11:05 CoCoA-5 Feature #1011: Random seed fn
- I have implemented @reseed@, and written a manual page.
Not sure about making a test... I suppose I could make an ea... -
11:03 CoCoA-5 Design #1067 (In Progress): "Randomize" and "Randomized" obsolete?
- The old CoCoA-4 function @Randomize(F)@ is essentially equivalent to:...
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10:57 CoCoA-5 Design #1067 (Closed): "Randomize" and "Randomized" obsolete?
- While looking through the CoCoA-5 on-line manual, I noticed that there are references to @Randomize@ and @Randomized@...
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