Activity
From 24 Sep 2016 to 23 Oct 2016
21 Oct 2016
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14:24 CoCoALib Feature #947: IsRadical for ideal?
- 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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07:46 CoCoALib Design #950: factor and SmoothFactor for integers --> FactorINT, FactorINT_TrialDiv, FactorINT_PollardRho
- @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!
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- The first example (with 24 indets) was consuming over 7Gbytes of RAM after 15 hours of CPU, so I killed the process (...
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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- I've just added a first check if the ideal is zero-dimensional.
Thanks to our new MinPoly that is much faster.
This... -
- Here is Mario's second example: I have chosen @ZZ/(101)@ for the coeffs, but the original was over @QQ@...
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- Here is Mario's first example: I have used coeffs in @ZZ/(101)@ but the original was over @QQ@...
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- Mario gave me two examples where Singular computes the radical *much* faster than CoCoA does.
I'll put the examples ... -
- This would be quite useful. For the time being should we just add...
17 Oct 2016
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- From looking at the code in @BuiltinFunctions-CoCoALib.C@, here is a list of other suspect impls:
* *@len@*
* *@syz... -
- Oh dear! The problem is more widespread. Even @len@ evaluates its arg twice 8-O
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- Are there any other fns with a similar problem? 8-{
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- Here is some code we could add to one of the CoCoA-5 tests:...
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- Two test cases:...
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- Having just looked at the code, I'm not entirely surprised.
Also why are there calls to @evalArgAsListOfRingElem@ ... -
- @ideal(RING, func(...))@ evaluates func once,
@ideal(func(...))@ evaluates func twice.
14 Oct 2016
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- I have reconfirmed that there is strange behaviour on the Linux machine here in Kassel. Compiler is @g++@ version 5....
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- Getting a better error message from the input @ideal(R,x)@ would be decidedly tricky. The error is actually triggere...
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- The source code the *@ideal@* function in CoCoA-5 appears to start at about line 1520 in @BuiltInFunctions-CoCoALib.C...
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- The options relating to @readline@ have inconsistent names:
* *@--with-readline=@*
* *@--with-libreadline=@*
The...
13 Oct 2016
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- I have also change the "goodbye pop-up window" in the GUI so that it says "Ciao" instead of "Bye".
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- This will be a little tricky so postponing.
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- Another postponement. It is probably nice for a user to find in a single place a summary of the main quirks/foibles ...
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- No chance of finishing this is in the near future; postponing by 1 version.
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- Should there also be an option to say not to use @readline@ even if it is present?
If so, what should the option be ... -
- This issue seems dormant, in reality every time we open a package we clean it up a little bit ;-)
(for example with ... -
- This is going to be a long and tedious job; moreover it should probably be done when Anna and I can be together.
F... -
- Since the fns which depend on @libblas@ are not documented, perhaps all public versions should be without them (not j...
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- Postponing again; also lowered priority to *low*.
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- Postponing because I have no idea how to resolve this (certainly not in the near future).
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- I am postponing this issue; perhaps I'll wait until it becomes "necessary" for some other task, then decide what to d...
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- This has been dormant for over two years; should we just close it? I guess Limbeck is/was unable to test it for us.
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- Thanks John! Now we have only the "16bytes"...
12 Oct 2016
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- The following URL may help:...
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- One easy way to avoid the problem is to paste the line into a buffer in @cocoa5-mode@ (_e.g._ associated to a CoCoA-5...
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- Note that issue #433 dealt with the problem of sending long lines from a @cocoa5-mode@ buffer to the interactive CoCo...
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- I sent a long line to an interactive cocoa5 inside emacs (v.24.5).
CoCoA saw only the first part of the input line; ... -
- 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... -
- This is probably not the right place, but I happened upon the following web page about problems with Emacs becoming v...
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- Add also to check whether the CoCoA-5 tests pass with @BackwardCompatible.cpkg5@
(automatize this step) -
- First round of @make ManExamples@
(checked and made a few fixes in Makefile) -
- Yes, it would be good to find a way of giving recognition to those who have contributed to CoCoA(Lib).
A possible ... -
- From #711 (8) (External Libs: print credits?)
If we do implement some scheme for recognising use of external librari... -
- list of linked libraries is printed what cocoa starts.
For the refinements I opened issue #943.
Feedback on this? ...
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... -
- There is quite a lot of "cruft" in the packages: either commented out code or code which I suspect can never be calle...
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- I have already make a first pass at cleaning up the packages, but there is still more to do.
The CoCoA-5 tests are... -
- Even though (we hope that) all the packages are destined to migrate to CoCoALib, it is probably worth keeping them re...
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- This is likely to be an arduous task, and will surely take a long time.
My hope is that the same tests can still b... -
- While trying to "modernize" the CoCoA-5 packages, I thought that running the CoCoA-5 tests would be a good way of tra...
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- I had already done some cleaning, so that now @IsConvertible@ is not used.
Now I removed the commented out old code.... -
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- Done. cvs-ed.
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- Anna Maria Bigatti wrote:
> Every so often we should run the tests without the BackwardCompatible package. (I tho... -
- John Abbott wrote:
> By "smoothly" do you mean that it should not yet be moved to @obsolete.cpkg5@?
Yes, that's w... -
- By "smoothly" do you mean that it should not yet be moved to @obsolete.cpkg5@?
We could even move @Bin@ to @obsole... -
- No need to do any change: the official names are indeed @binomial@ and @deriv@ as in cocoalib.
I'd rather keep @Bin@... -
- My preference is for *@deriv@* in both CoCoALib and CoCoA-5, but that is not backward compatible :-/
I think @deriv@... -
- Should we change @deriv@ into @der@ in CoCoALib?
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- I believe this is at a good point, especially for prime cardinality. Elisa?
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- Close this issue? I think that @ideal(x)@ is hard to beat ;-)
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- No need to do any change: the official name is indeed @factorial@.
I'd rather keep @Fact@ working smoothly for some ... -
- In #868 (comment 3) Anna pointed out that the name *@Fact@* could easily be seen as ambiguous (short for *@factorial@...
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- I suggest renaming *@Fact@* to *@factorial@*, the same name as used in CoCoALib.
This change is not backward-compati... -
- Yes, apparently I thought I still needed the version in the xml, but I don't.
I cannot imagine what may go wrong rem... -
- It seems this is no longer needed.
... I cannot find any use of version and date in online.C...
another thing I did... -
- I wrote it in June, and forgot to report it.
Feedback now. -
- cvs-ed manual
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- added @CallOnGroebnerFanIdeals@. Works fine.
Philosophically a stream would be cleaner, but no time to think about ... -
- I have added the keywords *@exit@* and *@quit@* to the file @cocoa5.el@.
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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... -
- The suggestion of another function (perhaps called @ReadExprList@) still seems good to me.
Hmmm, but then again a ... -
- I think I have fixed it all now.
The comment about changed semantics (comment 5) no longer holds!
Note that @1.... -
- 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 ...
03 Oct 2016
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- It seems that the weights must be integer. This should be documented!
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- The fns @ElimMat@ and @ElimHomogMat@ should give error if the user supplies weights are not strictly positive (intege...
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- This has been "resolved" for 4 months; moving it to "feedback". I expect the current scripts are not perfect, but th...
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- I record that on 2016-05-20 Logar sent the following email (in italian) which says that the critical linux package to...
30 Sep 2016
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- I tried on my old MacBook with g++-4.2, and the results were disappointing. The new class @INDEX@ was significantly ...
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- In the example code above, initially I used the name @index@ for the class (rather than @INDEX@) but that produced st...
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- Here is the test code I have been using: (functional rather than elegant)...
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- For the record, here are the timings I obtained (on the Linux tower in my office):
built-in @IdentityMat@ 1.66s
@Id... -
- I implemented a prototype, and ran a speed test. The results are mixed: usefully faster than current @MachineInt@, b...
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- Advantages:
* One hope is that the simpler implementation may allow the compiler to be clever (and optimise away alm... -
- The implementation of @MachineInt@ is a bit messy as it tries to guarantee that no information will be lost (_e.g._ a...
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- This should be easy once elim orderings are properly implemented, right?
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- Currently there is a single @configure@ script for both CoCoALib and CoCoA-5. Strictly they should be separate.
I... -
- A reasonable solution might simply to be to remove the BOOST dependent code in @ThreadsafeCounter@. This would mean ...
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- As far as I can see, the code in @ThreadsafeCounter@ will probably become much simpler when we switch to C++11 (since...
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- Currently we have a single configuration process (script) for both CoCoALib and CoCoA-5. This is not ideal!
Gereo... -
- An aspect to bear mind if we do opt to become BOOST dependent is that linking would then require linking (first) with...
29 Sep 2016
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- John Abbott wrote:
> Should @ElimMat([1,2,3], 4)@ and @ElimMat([3,2,1], 4)@ give the same result? Why or why not?
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- Should @ElimMat([1,2,3])@ and @ElimMat([3,2,1])@ give the same result? Why or why not?
In other words, does the o... -
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- I'm no longer sure what worried me so much about @ConstMatrixView@; I suspect that the new class @ConstMatrix@ has pr...
24 Sep 2016
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- Make GBasis verbose mode official (both in CoCoALib and CoCoA-5).
Requested by Tetsuo Ida -
- Since we have decided that expressions of the form @1/3*x@ deserve a warning on input, and since with genuine rationa...
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- A polynomial with TwinFloat coeffs does not put the coeffs in brackets....
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