Activity
From 17 Apr 2015 to 16 May 2015
15 May 2015
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19:28 CoCoALib Design #683 (Resolved): Module index component in internal compressed representation
- tested both with @unsigned int@ and @unsigned char@: it works!!...
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- Bug probably found.... my fault
John has implemented in GBEnv.C... -
- Some notes:
In @OrdvArith.H@ there is this comment:... -
- 32749 is the biggest prime with some guarantee for <I-cant-remember-what>, so the order matrix is actually over ZZ/(3...
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- I still don't understand why it seemed to work (maybe a missing cvs checkout)
The problem is a simple (when you know ... -
- with (CoCoA-5) input:...
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- CoCoA-4 had the syntax @I <= J@ which is now computed via @IsContained(I, J)@.
Investigate on how to return a meanin... -
- there are two functions: *MinGens* (for homogeneous case) and *MinGensGeneral* (trivial algorithm for non homogenous ...
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- Anna Maria Bigatti wrote:
> Added entry "All CoCoA Commands".
> It only gives the list of entries with type "comman... -
- Done (hilop.cpkg5)
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- Add more module operations: +, colon, ...
(there are also some operations for modules in CoCoA-5 packages)
The ma... -
- Add more module operations: +, colon, ...
Not much to do for CoCoA-5: most of the work is proper design in CoCoALib. -
13 May 2015
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17:59 CoCoALib Feature #658: Indets actually in a poly (or vector or matrix)
- An advantage of @vector<bool>@ is that it avoids the problem/incompatibility of indices in C++ starting from 0 (both ...
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- JAA and AMB think that there is little need to have a similar function in CoCoALib since there are the CPP defines @C...
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- Done.
Just fiddling with the string returned by... -
- Some ideas:
* a function @ExternalLibs@ which returns a list of strings
* a function @HaveExternalLib@ which expect... -
- It might be nice to have a way in CoCoA-5 to know which external libs are actually present.
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- This issue is not so important (hence priority *low*); not even sure it is worth fixing, as it may complicate the bui...
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- If you have CoCoALib already (configured and) compiled, and want to repeat compilation but also including an external...
12 May 2015
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- John Abbott wrote:
> JAA notes that Emacs lisp has the built-in variable *@system-type@* which gives information abo... -
- JAA notes that Emacs lisp has the built-in variable *@system-type@* which gives information about which OS is running...
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- Anna Maria Bigatti wrote:
> So, we cannot remember why we did this change: probably to allow spaces in path.
We r... -
- In earlier versions @cocoa5-executable@ was @CoCoAInterpreter@.
Now it is the script @cocoa5@ (and this caused prob... -
- The problem was solved and tested on a student's computer.
It is enough to add one line in the file *<cocoadir>/emac... -
- The recent installation of CoCoA for the Computer Algebra course in Genoa showed a problem on Windows in finding pack...
11 May 2015
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- Done.
If the matrix is over an IntegralDomain then it is mapped into FractionField.
Then the inverse is mapped back... -
- Anna says OK for the name -- hard to find a shorter name which is clearer.
I have clarified the manual.
Closing.
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- I noticed that some of Christof's code uses @rank@; I have written to him asking whether it would be resaonable to ch...
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- I think everything has now been done.
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- CoCoA-5 prints an empty line after each input line which outputs nothing.
Might be related to the fact that standa... -
10 May 2015
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- Currently the function is called @eratosthenes@; is there a better name?
The doc needs slight clarification @erato... -
- Can we close this?
09 May 2015
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- The implementation will almost surely be best done via mem fns since the actual inner working of an "accumulator" wil...
08 May 2015
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- Following CoCoALib conventions the return type should be @vector<long>@.
What should the values in the vector be? ... -
- This issue has status @Feedback@ but the percent done is just 20%.
What is the actual status? Should this issue be ... -
- I have implemented a first version of @AdjByDetOfMinors@; it may already be obsolete because I have also implemented ...
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- There is a file @test-OrderedRing1.C@ which is not actually executed.
Either fix it so that it works (currently fail... -
- Commented out code could make sense in the following cases:
* the test is valid, but the relevant CoCoALib code is N... -
- Several test files contain commented out code; this should either be removed or made active (or perhaps add a clear c...
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- Actually I am rather surprised that it is not necessary for all tests.
Investigate why it works without explicitly... -
- Some test files explicitly include @CoCoA/assert.H@ but many do not.
Check that it is truly needed when it is pres... -
- JAA has finished all test files. Will check-in, then we can verify on several platforms that all is well.
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- Here is an invertible 3x3 matrix...
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- The excesive verbosity has arisen again: @Rank@ was exported from 2 packages (@BackwardCompatible@ and @obsolescent@)...
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- generated cvs log...
07 May 2015
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- JAA has now done @test-[J-Q]*.C@ and @test-[a-h]*.C@
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- The file @src/tests/Makefile_dependencies@ seems to be suspiciously simple. Either it is wrong or it is pointless. ...
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- Anna Maria Bigatti wrote:
> - when @IsZeroDivisor@ is called and should return @false@ then its ring is not integral...
04 May 2015
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- In the example given I note that @x@ is actually a *protected* variable -- perhaps even more reason for a warning?
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- In function definitions local variables hiding outer ones are signalled by a Warning.
At top level not. This might ...
30 Apr 2015
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- Also @x/i@ is working now.
(will cvs it this afternoon) -
- ...
29 Apr 2015
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- Polishing up all the code is always long and tedious....
Anyway!
The code is there and it works.
I still have prob... -
- Hint: @DenseMatrix.C:462@ the dispatch function @DenseMatImpl::myDet@ does not handle matrices over ZZ specially -- t...
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- Just as a speed comparison reference I computed @3^(3^17)@ on both machines:
* old G4 took about 50s (on battery pow... -
- I've just tried a 1000x1000 matrix: the old G4 took about 550s, my newer MacBook Pro took 1400s. Embarrassing!
*NOT... -
- What?!? My dad's ancient iBook G4 is just as fast as my much newer MacBook Pro???
Something must be seriously wro... -
- I tried computing the following:...
24 Apr 2015
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- Let's start with just yours, for many reasons:
- it is simpler, as you said
- indeed that's also what I needed ;-)
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- We could simply have both; that way the user can choose which is more convenient (or efficient).
If we do choose t... -
- I wanted a @RandomSubset@ function which generated a random subset of @1..n@ of cardinality @r@. I was surprised whe...
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- I do find it annoying when CoCoA says that name @XYZ@ is a package-exported variable but then does not tell me which ...
23 Apr 2015
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- What exactly should the interface be?
Who does the Chinese remaindering?
Which single rational reconstructor shou... -
- Implement the algorithm for simultaneously reconstructing several rational numbers.
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- Suggested name of the new fn is @BadMFactor@; other candidates?
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- In @RatReconstructByContFrac@ the bad factor of the combined modulus is computed; make it publicly accessible
22 Apr 2015
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- I thought that it could be improved using geobuckets, so I searched the actual code performing the computation.
It i... -
- We found this slug while workig on @Implicit@ (evaluation for checking the final output can be very slow)
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- Application of PolyAlgebraHom can be unreasonably slow (this is indeed a problem in optimizing multivariate evaluation)
20 Apr 2015
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- Better names:
* *@myMoveLMToFront@*
* *@myMoveLMToBack@*
* *@myAddMulLM@*
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- John Abbott wrote:
> Mario Albert calls @myAddMul@ in a "bad" way in @TmpJBEnv.C:323@.
> From his comments it seems... -
- Renaming is done now. Isn't it?
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- As it works for me and for Anna, I'm closing the issue. The EmacsUI code really needs to be completely rewritten, bu...
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- It works for me.
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- also related to #91
19 Apr 2015
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- I ran the following test:...
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- While testing/profiling @IndetsIn@ (defined in @BuiltinOneLiners.C@) I noticed that the arg was copied by the fn, mak...
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- I am still undecided about the "return" value (and its type):
* *A* a list of integer indices (presumably of type @ve...
17 Apr 2015
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- I have impl'ed a first version (simple rather than efficient).
Not yet checked in; I want to do some testing first.
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- Mario Albert calls @myAddMul@ in a "bad" way in @TmpJBEnv.C:323@.
From his comments it seems he wants to do:... -
- I have just added a check that the first arg must be non-zero (o/w LM does not exist).
Should it be an error or a @C... -
- The mem fn @SparsePolyRingBase::myAddMul@ has strange semantics; the only documentation is a 1 line comment in the so...
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