Activity
From 04 Nov 2016 to 03 Dec 2016
02 Dec 2016
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09:13 CoCoALib Feature #961: New function: ReducedGBasis
- the GBasis is not reduced if the ring is not commutative
(ideal(x,dx) is homogeneous, so the algorithm does not expe...
01 Dec 2016
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11:36 CoCoA-5 Design #989 (In Progress): init file obligatory?
- If it can be done quickly, I see no objection to having a *@--no-packages@* option.
I am not entirely happy about ... -
- I have opted to use a symbolic link from @/usr/local/bin/cocoa5@ to the actual script which does the work (_e.g._ @/u...
30 Nov 2016
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- I have built what seems to be a portable 32-bit executable of @CoCoAInterpreter@ on the Linux VM (on my old MacBook)....
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- Here are some notes I have just made (after trying to compile CDD and GFan on my netbook)....
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- I now think that it might be simpler to make @/usr/local/bin/cocoa5@ a (symbolic?) link to @/usr/local/bin/cocoa-5.1....
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- I have just checked in a first attempt at making an @install@ target for CoCoA-5.
Currently the destination director... -
- When I added @init.cocoa5@ I did not consider the possibility of calling cocoa passing explicitely an empty directory...
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- John Abbott wrote:
> In my tree @init.cocoa5@ contains 9 lines, but only 2 (or perhaps 3) actually do anything usefu...
29 Nov 2016
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- The critical section of source code appears to be around line 126 of @Main.C@.
(call to @perror@)
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- In my tree @init.cocoa5@ contains 9 lines, but only 2 (or perhaps 3) actually do anything useful.
I suggest keepin... -
- I found this while trying to create a "quick start" CoCoA-5 by giving it an empty directory as the place to look for ...
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- Currently the @CoCoAInterpreter@ requires that there be a file @init.cocoa5@ in the same directory as the packages.
... -
- Has the blas-free version been put on the website?
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- The instructions for installing CoCoA-5 on linux still need improvement!
* what to do with the file @cocoa-XYZ.tar... -
- I have added a *@--no-boost@* option to the @configure@ script; this disables automatic searching for the BOOST heade...
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- The CoCoA @configure@ script complains if someone specifies "with Normaliz" but "without BOOST". The code in CoCoALi...
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- This will be a little complicated because we need to install both the executable and the packages, and also tell the ...
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- Zoltan kovacs would like to install both CoCoALib and CoCoA-5.
Currently the @install@ target in the Makefile instal...
28 Nov 2016
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- I have moved this issue to CoCoALib, which is where I had expected to find it.
On several occasions I would have l... -
- The relevant place in the code seems to be in @SparsePolyRing.C:814@.
To see how slow the current code is, try the... -
- While trying to comprehend the (undocumented) code I wrote in @ArithGroup.cpkg5@, I noticed a comment about GCD being...
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- Is this now resolved? Or even in @feedback@? Perhaps change target version?
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- Anders let us know by email (2016-11-28) about the problem in @gfanlib@.
I have already asked how a shell script c... -
- Anders reports that @gfanlib@ version 0.6 contained a bug.
We should either require that @gfanlib@ be newer than 0.6... -
- Ablamovicz's email was sent on 2016-11-28.
It might be enough to supply a simple *@example.cocoa5@* file which can... -
- Recently Rafal Ablamowicz reported problems with installing CoCoA-5 (with emacs) on a windows 10 computer.
He had ...
26 Nov 2016
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- I noticed that in this example the order matrices always have strictly positive entries in the first row. Are zeroes...
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- Here is the same example as in issue #973...
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- After using @GroebnerFanIdeals@, I noticed that some order matrices can have quite "large" entries (_e.g._ greater th...
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- After recently delving into the source code for the interpreter to handle interrupts as I'd originally intended, I am...
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- I tried to put GFan on the Linux box in Kassel, but did not succeed in getting CDD properly installed.
Part of the p...
25 Nov 2016
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- The standard ostream @clog@ would be the logical choice for logging messages (on a program that runs inside an xterm,...
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- Which @ostream@ should be used for log messages produced by "verbose mode" or "obsolescent" warnnings?
Note that e... -
- Perhaps the current behaviour is not so bad: CoCoALib converts any interrupts that it detects into an exception of ty...
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- With the current design (where the exception produced by an interrupt is not of type @CoCoA::ErrorInfo@), if you inte...
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- Works on other examples (used in factorization over algebraic extensions).
Thanks! great! -
- Added Anna's example to CoCoA-5 @tests/exbugs.cocoa5@. Checked in.
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- I have modified @SparsePolyRingBase::myGCD@ to handle specially only if coeffs are @IsRingFp@; previously it just tes...
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- This example gives error (others seem to work fine)...
24 Nov 2016
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- Maybe the one I wrote could then be called @NumDenSize10@?
I still think it is useful, for a human, to know that. -
- Anna has put a first prototype in @experimental.cpkg5@; it follows the original defn. It is deliberately not documen...
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- The definition originally proposed in email was to return a pair of integers being effectively @[max(FloorLog10(num(c...
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- In email Anna proposed a function, tentatively named @CoeffSize@, to measure the size of the coeffs in a poly (over @...
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- I stumbled across this problem/issue again when trying to implement @GCDFreeBasis@ (see #259).
In reference to my ... -
- GBasis is now exactly ReducedGBasis.
(still an error on RingWeyl, though, where it is not interreduced) -
- John Abbott wrote:
> [translated from an email written in italian]
>
> Here is a potentially important point. Fo... -
- [translated from an email written in italian]
Here is a potentially important point. For simplicity I consider th... -
- Anna now reports that @GBasis@ actually produces an irredundant fully reduced GBasis; the only step missing for makin...
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- I have written a first version (for @RingElem@) by translating almost directly the impl in @GCDFreeBasis.cpkg5@. I h...
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- I now think that the "universal" denominator is valid for any monic basis which contains a RGB as subset (since the o...
23 Nov 2016
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- I wonder how "universal" @UniversalRGBDenom@ is? Does it also apply to all Janet Bases? And Pommaret Basis (if it e...
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- John Abbott wrote:
> The name *@UniversalRGBDenominator@* is OK for me.
>
> I note that there are already two "de... -
- The name *@UniversalRGBDenominator@* is OK for me.
I note that there are already two "denominator" functions: *@de... -
- John Abbott wrote:
> I'm still hoping to find a better name than @UniversalDenominator@; I feel that it ought to con... -
- Now prints "*" with verbosity >=10 /// updated...
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- Added @GroebnerFanReducedGBases@.
For the "*" I could use the new "VerbosityLevel". Working on it. -
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- I realized, after trying to implement it, that CoCoALib @myDoGBasis@ already does it!!
In fact the only operation no... -
- Now we have @SetVerbosityLevel@ it should be (almost) trivial.
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- Added in CoCoA-5. Fantastic!
22 Nov 2016
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- I still like the idea of an iterator, but it would be hard to "export" the notion to CoCoA-5. Maybe that does not ma...
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- Added *@SmallestNonDivisor@* to @NumTheory@; also available in CoCoA-5.
Updated doc for @NumTheory@.
Still to do: ... -
- I have implemented @SmallestNonDivisor@ (see #979).
I'm still hoping to find a better name than @UniversalDenomina... -
- The other functions should be called @UniversalDenominator(I)@ and @SmallestExcellentPrime(I)@.
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- Out of curiosity.... Does GFan produce order matrices with smallest possible non-negative entries?
In the example fr... -
- I have rewritten the man page for @GroebnerFanIdeals@ (and already checked in, if I recall correctly).
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- Anna Maria Bigatti wrote:
> One possibility, for small examples (or for convincing the user it is not a good idea ;-... -
- I have added (yet another) configuration option *@--ignore-gmp-cflags@*.
Combining this with *@--with-cxxflags=@* sh... -
- John Abbott wrote:
> What applications do you have in mind?
I haven't yet replied because I cannot remember... I ...
21 Nov 2016
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- After a brief discussion on email, I think it is best to write on redmine.
Robbiano proposes a function to find the ... -
- In the context of the "universal denominator" for a polynomial ideal, it could be useful to find the first prime whic...
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- I have changed the format of the error messages in the existing shell scripts: the script name is now placed last (an...
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- OK, we can try with the script (base)name at the end of the message. It shouldn't take too long to make the change.
... -
- My preferred is...
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- John Abbott wrote:
> Another idea is to have a configuration flag for "developers" so that the errors from scripts s... -
- Another idea is to have a configuration flag for "developers" so that the errors from scripts say which script gave t...
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- John Abbott wrote:
> I think the confusion came from the way the documentation is worded.
>
> I have rerun the ex... -
- I think the confusion came from the way the documentation is worded.
I have rerun the example from comment 2, and ... -
- It would be nice to have as result the list of ideals *generated* by the reduced GBases, but in that way (in CoCoA-5!...
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- Some aspects to consider when deciding the semantics:
* we may assume that the result is positive (if coeffs in @QQ@... -
- In fact there is already an undocumented builtin fn called @CommonDenom@, but only for RINGELEM. The fn also exists ...
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- Should there be a function called *@CommonDenom@* (or something similar)?
For polynomials? For lists of polynomials? -
- I copied John's code for further experiments in our working dir MinPoly2016, file @Deltone.cocoa5@. CVS-ed
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- By John Abbott:
Robbiano suggested that it could be interesting to find the first (or at least a smallish) good pr... -
- By John Abbott:
Does this code correctly compute the "universal denominator" for the ideal I?... -
- [Coming from our recent work on MinPoly]
It would be interesting to investigate the "universal denominator" of an id...
18 Nov 2016
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- Is there any reasonable chance of finishing this for the upcoming version? Or should we postpone it?
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- Michael Wheat reports that Anna's compilation (without libblas) works fine for him.
Does that mean we can make pro... -
- What applications do you have in mind?
In some ways it is not so different from a "factorization".
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- moved to #977
Robbiano suggested that it could be interesting to find the first (or at least a smallish) good prim... -
- I have now changed the call to @CheckForInterrupt@ in @TmpGReductor@ to the simple call that I had expected to see, a...
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- The GUI seems to work tolerably well too.
There is a problem with underlining some expressions, but that problem e... -
- I have just checked in a version of CoCoA-5 that should handle interrupts more nicely.
I have added a new handler ... -
- Another possibile one-line format could put the script name in brackets somehow:
(first line is the current format)
... -
- One suggestion for the format of the error messages is to use 2 lines, perhaps like this:...
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- While unformity is nice, it is not so important if the existing scripts work well enough ==> low priority.
I think... -
- There are numerous auxiliary shell scripts (in directory @configuration/@).
They do not have a uniform way of commun... -
- If I recall well, with the @clang@ compiler there is a compile-time error with the platform-specific flags from the "...
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- I have updated all the auxiliary scripts to use temp dirs in @/tmp@ following the naming convention suggested above. ...
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- Also done the @gfan@ scripts (and fixed some more tiny problems in the @gmp@ scripts).
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- I have now adopted the following naming convention for the tmp dirs:
*@/tmp/CoCoALib-config-abbott-2016-11-18/gmp-cx...
17 Nov 2016
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- moved to #977
Does this code correctly compute the "universal denominator" for the ideal I? (...)
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- John Abbott wrote:
> I tried @GroebnerFanIdeals@ on the following input:
> [...]
> The resulting list @GF@ has 195... -
- I tried @GroebnerFanIdeals@ on the following input:...
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- I have given this a higher priority because I think it will be quick and easy to resolve.
@Anna: can you do it? (b... -
- Two mild criticisms:
* it prints out an asterisk for each fan ideal found
* the generators of the ideals are not mo... -
- I have changed the @gmp-XYZ.sh@ scripts... configuration still works on my machine (I think).
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- Some scripts need to know where the *@ExternalLibs@* directory is located.
I think the simplest way to pass in this ... -
- Using @/tmp@ for temporary directories is very tempting, but must be done safely (_e.g._ cannot have two users trying...
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- I have modified the script @gmp-cxx-flags.sh@. A quick test on my machine passed (well, the first few tests didn't p...
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- I hope to resolve this while I'm here, and can see what happens on Gereon's cloud.
Of course, it is tedious having... -
- Gereon had a strange problem. He was compiling on a cloud VM, and got strange error messages about the platform-spec...
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- This should really be under CoCoA-5, but I hope that @RealRoots@ will soon be migrated to C++ (see #440).
My curre... -
- The fn @RealRoots@ lets a user specify an interval in which to look for real roots.
If the initial ends points are n... -
- Here is a possible design:
* user deals with a smart-pointer class (_e.g._ like ideal)
* internally there is an abs... -
- Here are some possible applications:
* converting polynomials to/from CoCoALib (_e.g._ other library may keep terms ... -
- Just adding some *keywords* to this issue (so it is easier to find via redmine search).
*Summation*, *summer*, *summ... -
- I will write GenRepr for poly/ideal leaving the marginal cases to cocoa-5 code.
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- Clearly it was not possible to have it by summer 2016 :-)
@Anna: would it be easy to add?
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- Here is a possible way to implement the idea in comment 2.
The "index" could be a pair of pointers: one pointer to... -
- Since the feature being exhibited in the examples is called @SparsePolyIter@, it makes more sense that the files be c...
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- There are examples for using @SparsePolyIter@; why are the files they are in called @ex-PolyIterator@?
@ex-PolyIte...
14 Nov 2016
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- Cane we have something more compact like this?...
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- I have made some changes to @Interpreter.C@ (mostly adding catch commands for @InterruptReceived@).
I have not (ye... -
- In issue #714 I had guessed that the only place I needed to catch @InterruptReceived@ was around line 2678 of @Interp...
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- As far as I can see, the CoCoA-5 interpreter needs to be modified so that it catches both @CoCoA::ErrorInfo@ and @CoC...
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- Looking at the call to @CheckForInterrupt@ in @GReductor::myReduceCurrentSPoly@ (around line 760 of @TmpGReductor.C@)...
11 Nov 2016
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- I suggest proceeding with definition (a):
* it is already implemented
* it is easy to explain/describe
If we com... -
- I prefer (c) to (b) perhaps because it is sparser.
(a) and (c) clearly do not give the same term-ordering though t... -
- (similar for ElimHomogMat)
What should @ElimMat([2,3], mat([[1,5,2]]));@ return? (now it is (a))... -
- I have added the relevant line to all instances of @operator<<@ (for @ostream@, but not for OpenMath output fns).
... -
- I have just checked in a first impl of "verbose".... including doc and an example (but no test).
Perhaps we can tr... -
- With reference to comment 6, and the example there.
I now think it would be better to require that the programmer ...
10 Nov 2016
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- I constructed the example in comment 5 by taking a sparse polynomial (in this case @z^30-1@) which has a factorizatio...
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- Here is another example which rather suggests that the problem is quite difficult in general:...
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- John Abbott wrote:
> This makes me think that it has effectively computed @(x+y+z+1)^498@ and then discovered that a... -
- On the fixed linux box here it took about 210s to compute @NF(f,I)@.
This makes me think that it has effectively c... -
- John Abbott wrote:
> When computing a @NF(x^999*y^999,I)@ we can use either GBasis element for the reduction.
> CoC... -
- When computing a @NF(x^999*y^999,I)@ we can use either GBasis element for the reduction.
CoCoA ought to prefer reduc... -
- Here is a silly example where NF takes longer than it should:...
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- John Abbott wrote:
> I am concerned that they may make wasteful copies of the elements of the list/vector.
Surely... -
- I am not yet convinced that @first@ and @last@ are good ideas for C++.
What exactly are the hoped-for semantics? ... -
- Equivalent to @first,last@:...
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- In CoCoA-5 we often first and last for making sub-lists.
This is tedious to translate into C++.
Make good C++ docum... -
- I have tried a quick experiment, and can confirm that (on my computer) creating an @ofstream@ with a default ctor (_i...
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- A reasonable development strategy could be to resolve #931 (verbose for GBasis) using the ideas suggested here.
When... -
- I tried interrupting a long gbasis computation (as part of one of Mario's long radical examples). The computation ha...
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- I see that there is an involutive saturation.
How does that work in general? should we use that instead of GBases?
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- I have modified ComputeSaturation using the factorization (repeats saturation on the factors).
I don't know if that'... -
- I implemented another naive algorithm (elim(h, I+(f*h-1))), but seems even worse.
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- saturate is slow (naive algorithm: repeated colon).
Improve it. -
- The motivation behind this issue is the idea of using an @ostream@ with its bad-bit set to simulate @/dev/null@.
T... -
- Functions for outputting values should return immediately if the output stream is bad.
This is potentially important... -
- This was done (up to 4 args): 2014/12/02
09 Nov 2016
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- Fixed a bug (with Robbiano)
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- Add functions to print resolutions with multigradings and their Betti numbers
(BettiMatrix and BettiDiagram cannot b... -
- I have found the (a?) slow step: there is a call to @saturate(I, ideal(RingElem(RingOf(G),G1)))@ taking a long time.
08 Nov 2016
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- I cheated: instead of trying to understand XSL I just changed the few "<" into "&lt;".
Works smooothly now.
(... -
- Sometimes a function seeing a list as multiset (and counting the repeated elements) could be useful.
In practice som... -
- Here is another example: CoCoA-5 took about 760s, while Singular took about 0.6s (more than 1000 times faster).
<pr...
07 Nov 2016
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- Here is another idea (perhaps not so very KISS).
*NOTE* see my revision in note 10
At the start of a fn in whic... -
- I was thinking of having a *single* global variable for controlling verbosity, rather than many different names for d...
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- For the specific case you mentioned:
in MinPoly.C set... -
- A possible design would be to have a global variable containing the verbosity level; so this would presumably be gove...
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- Sometimes it could be helpful to have a verbose mode to understand what is happening inside a long computation (_e.g....
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- Might it make sense to have a general "verbose" mechanism for CoCoALib?
(in addition to the specific one for Groebne... -
- What exactly does multiplicity do?
I made the mistake of trying to compute @multiplicity(I)@ instead of @multiplic... -
- There is a problem for the manual of @StagedTrees@ because there is a "<".
I thought that was sorted out a long time... -
- Renamed @AreGensSquareFreeMonomial@ into @AreGensSqFreeMonomial@.
Added to CoCoA-5 (with doc) and to obsolescent.C... -
- I have renamed *@IsRadical@* (for @PPMonoidElem@)to *@IsSqFree@*. The old fn has been moved to @obsolescent.C@ (see ...
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- First pre-release for linux (64-bit)
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- This was resolved a year ago. I have just performed the test suggested in comment 1, and there are no warnings (the ...
05 Nov 2016
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- A recent email from Michael Wheat reports that installing *@libopenblas@* is not sufficient (at least not for him).
... -
- Also added *@doc/txt/obsolescent.txt@* (with relevant changes to the index files).
Perhaps Anna could check what ...
04 Nov 2016
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- Added @test-obsolescent.C@, @ex-obsolescent.C@ and added doc to @GlobalManager.txt@.
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- Thanks, Anna! :-)
Checked in.
I did apparently lie slightly: the user has to add the include directive *and* a... -
- John Abbott wrote:
> Is it really too much to ask the user to add just one line to their file: *@#include "CoCoA/obs... -
- I really do not like the idea of including obsolescent fns by default: in what sense would they be obsolescent?
Is... -
- John Abbott wrote:
> Perhaps we do not need any preprocessor flag. What about the following approach?
>
> The fi... -
- Perhaps we do not need any preprocessor flag. What about the following approach?
The file *@library.H@* does not ...
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