Activity
From 05 Oct 2016 to 03 Nov 2016
03 Nov 2016
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17:06 Support #953: new file for old functions: obsolescent.C
- I prefer not to have so many preprocessor flags. We do need 1 to make the contents of @obsolescent.H@ visible/invisi...
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16:45 Support #953: new file for old functions: obsolescent.C
- John Abbott wrote:
> My preference is that obsolescent fns remain invisible by default; the user must do something t... -
- I have checkedin the relevant files. The new files are called *@obsolescent.H@* and *@obsolescent.C@*.
CoCoALib i... -
- John Abbott wrote:
> I have a first implementation (but called the file @obsolete.C@ since I find "obsolete" easier ... -
- I have a first implementation (but called the file @obsolete.C@ since I find "obsolete" easier to type than "obsolesc...
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- John Abbott wrote:
> Here are some ideas about how we might achieve a reasonable design:
> * obsolete/obsolescent f... -
- Currently @ReducedGBasis@ is implemented in CoCoA_5.
Add it to CoCoALib, and add the flag @HasReducedGBasis@.
Suppo...
02 Nov 2016
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- Here are some ideas about how we might achieve a reasonable design:
* obsolete/obsolescent fns go into 2 files @obso... -
- John Abbott wrote:
> *NOTE* the special fn for PPs is still called *@IsRadical@*; should we rename it?
yes, pleas... -
- John Abbott wrote:
> I believe I have fixed the SEGV bug. Checked in new version of @DUPFp.C@. @Anna: could you ch... -
- I believe I have fixed the SEGV bug. Checked in new version of @DUPFp.C@. @Anna: could you check? :-)
*NOTE* p... -
- Reducing the example. These give segv:...
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- While comparing various implementations of radical(0-dim) I found this, unexpected for me:
@IsSqFree@ is quite fast ... -
- John Abbott wrote:
> Do you plan to add @MultiplicityQuot@ and @DimQuot@ to CoCoA-5?
> If one computes @dim(P/I)@, ... -
- Do you plan to add @MultiplicityQuot@ and @DimQuot@ to CoCoA-5?
If one computes @dim(P/I)@, does that actually creat... -
- Even though I invented it, I do not much like the name *@TidyGens@*...
Also, it is not clear to me how to deal wit... -
- Also implemented the member function @IHaveGBasis@
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- I implemented it.
It took a remarkably long time mostly for choosing the name and deciding where to put it.
In fact...
27 Oct 2016
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- Done. Still need documentation.
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- @multiplicity@ and @dim@ are implemented in cocoa-5.
Bring them to cocoalib.
The names should be *@MultiplicityQu... -
- I am still puzzled about how best to handle the trivial cases (0x0 and 1x1 matrices).
The relevant code is only 2 ... -
- The problem was simply that the generic Bariess code failed (on the very last line) when given a 0x0 matrix.
I hav... -
- The following triggers a SEGV:...
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- I have added a test (which revealed issue #956).
I would check in, but EduRoam is being more than usually obstructiv... -
- Perhaps the function is not that widely usable, but it was handy for something I was doing, so I made it publicly ava...
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- Write a new function which produces random unimodular matrices of integers.
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- How to know if the GBasis has already been computed? there is a member flag (myGBasisIsValid), but we should have a ...
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- What is the status of this issue?
I believe the code is there (and presumably has been active for some time).
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- It make sense for the ordering matrices to be over @ZZ@; for @IdentityMat@ it is useful to be able to specify the rin...
26 Oct 2016
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- In CoCoA-5 we have @obsolescent.cpkg5@, a package with all the functions declared obsolescent, for example if they ha...
25 Oct 2016
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- While testing @IsSqFree@ I observed that CoCoALib is very slow at computing @gcd(f,f')@ where @f = (x^2+1)*(x^27-x)@ ...
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- I have checked in code for the new fn *@IsSqFree@* (incl. tests and doc).
It is not complete:
* currently gives e...
24 Oct 2016
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- A function which tests whether a value is square-free is probably going to be quite similar to a function which deter...
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- Currently there is a function called @IsRadical(PP)@ for a PPMonoidElem.
Should it be called @IsSquareFree@?
"A n... -
- Write function IsSquareFree (or IsSqFr, or IsSqFree) for a RingElem
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- I like the idea of a fn @IsSqFree@; it certainly could be faster than testing equality with the radical (and also cle...
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- After spending some time thinking and writing, I realized that we would need a
@IsSqFree(f)@ which could be consider... -
- After some more reading, it seems that the usual structure is @QQ(x_1, x_2, ..., x_n)[u1, u2,...]@ where the expressi...
21 Oct 2016
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- I think there could be problems with removing indets by giving them values: if there is an embedded 0-dim component t...
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- Does that mean that you are in favour of offering the user the choice between a fast (and probably correct) answer, o...
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- @ProbSmoothFactor@?
or @SmoothFactor(n)@ and @SmoothFactor(n, "NoProb")@?
20 Oct 2016
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- I can make @factor@ and @SmoothFactor@ for integers faster in some cases by calling @IsProbPrime@.
The risk is that ... -
- Checked in the code. Also two new tests @test-NumTheory6@ and @test-SparsePolyRing3@.
No documentation yet.
Name... -
- John Abbott wrote:
> Currently I have used *@radical@* in CoCoALib, and *@rad@* in CoCoA-5 (to avoid a clash with th... -
- Before checking in which name should I use?
Currently I have used *@radical@* in CoCoALib, and *@rad@* in CoCoA-5 ... -
- I have an implementation in CoCoALib. It took so long because of a "mysterious bug" in @ContentFreeFactor@.
My cu... -
- The ctor args for a @DifferentialAlgebra@ are the following:
* *@n@* number of "independent variables"
* *@k@* numb...
19 Oct 2016
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- Some of Erika's people would like this to be in CoCoALib sooner rather than later!
18 Oct 2016
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- (from SC^2)
We could (easily?) implement a function doing an incremental GBasis: if I has GBasis GB, and we add a po... -
- John Abbott wrote:
> I wonder if a probabilistic approach could work. If the ideal is 0-dim, the speed is adequate.... -
- I wonder if a probabilistic approach could work. If the ideal is 0-dim, the speed is adequate. If not, perhaps we c...
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- The crude idea was just to run the usual code for computing the radical, and if at some point we determine with certa...
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- Apart from 0-dim (already implemented), and monomial, how can you determine it?
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- There is now "IsRadical" for 0-dimensional ideals. (and it's in our paper in progress ;-)
I've just realized I forg... -
- Werner and Mario ask whether it could make sense to have an @IsRadical@ function for ideals; can this be determined s...
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- This would be quite useful. For the time being should we just add...
13 Oct 2016
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- Thanks John! Now we have only the "16bytes"...
12 Oct 2016
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- I'll do @test-OrderedRing2@.... there is a leak in twinfloat.
I know where it is; now I just have to find a nice way... -
- Anna Maria Bigatti wrote:
> First run of valgrind (I had to reinstall valgrind on my mac...)
> [...]
The "16-byt... -
- First run of valgrind (I had to reinstall valgrind on my mac...)...
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- John Abbott wrote:
> Add also to check whether the CoCoA-5 tests pass with @BackwardCompatible.cpkg5@
OK, moved i... -
- Add also to check whether the CoCoA-5 tests pass with @BackwardCompatible.cpkg5@
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- Everything related to making a CoCoALib release:
# Redmine Roadmap: close or postpone issue
# Redmine Release iss...
10 Oct 2016
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- I have put this issue under CoCoALib, but it is just as relevant to CoCoA-5.
In general my personal preference is ... -
- I notice that we have the following 2 names for functions: *@intersection@* and *@saturate@*.
In CoCoA-3 and CoCoA...
08 Oct 2016
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- Unfortunately the code for reading "decimal numbers" appears twice: once in *@operator>>@* for @BigRat@ and once agai...
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- I have now implemented the following:
after @^@ there may be an unsigned integer literal or @(@ optional-sign unsign... -
- I have fixed it now, and added a new @test-RingElem5@ for the function @ReadExpr@ (for rational numbers).
Trickier...
07 Oct 2016
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- I see no choice but to make @2/3^4@ read as an expression @div(2, power(3,4))@, and this implies that all rationals e...
06 Oct 2016
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- It is a slightly subtle bug: at first sight it seems reasonable that @<constant>^<integer>@ should yield the obvious ...
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- After my change to @ReadExpr@ so that it can read rational numbers, the fn now misreads @"2/3^4"@ and produces 16/81 ...
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- Currently in MinPoly.C there is a class IncrLinDep.
It is small and neat: I think this is the perfect paradigm for a... -
- John Abbott wrote:
> What exactly do we want to allow in the exponents?
> The simplest solution would be to allow e...
05 Oct 2016
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- The relevant source is around line 100 of @RingElemInput.C@
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- What exactly do we want to allow in the exponents?
The simplest solution would be to allow either an integer liter... -
- The fn @ReadExpr@ fails if input contains an exponent which is not an integer literal: for instance...
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- I'm not sure how related this is: a twin-float value can be printed out with a trailing @<dot>@ if the value is very ...
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