Activity
From 24 Apr 2012 to 23 May 2012
23 May 2012
- 09:53 CoCoA-5 Bug #166 (Closed): Dim/Multiplicity with Lex ordering -- NYI
- ...
22 May 2012
- 12:06 CoCoALib Feature #165: FractionField -- only of TrueGCDDomain?
- I've just looked at the code for @FractionFieldImpl@. I must make a separate impl for arithmetic if GCD is not avai...
21 May 2012
- 17:27 CoCoA-5 Bug #137: JAA does not like the name IndetInd
- JAA talked to Anna. She liked @subscript@ and will implement.
- 17:11 CoCoALib Feature #165 (In Progress): FractionField -- only of TrueGCDDomain?
- After speaking to Anna and Renzo, we concluded that it is better to keep @FractionField@ general.
Anna proposed cr... - 15:09 CoCoALib Feature #165: FractionField -- only of TrueGCDDomain?
- John Abbott wrote:
> JAA proposes: the base ring of a *@FractionField@* must be a @TrueGCDDomain@ (and this must be ... - 14:36 CoCoALib Feature #165: FractionField -- only of TrueGCDDomain?
- If my proposal is accepted, someone will have to look through the existing code and remove any checks which will have...
- 12:51 CoCoALib Feature #165 (Closed): FractionField -- only of TrueGCDDomain?
- I've started implementing @IsTrueGCDDomain@.
I noticed that the ctor for a *@FractionField@* checks that the base ... - 15:59 CoCoALib Feature #40: Squarefree factorization - Alessio d'Ali`
- Alessio has a first solid version of his report.
We spoke of how to generate tables of timings automatically; Alessi... - 15:54 CoCoA-5 Feature #131: Conversion from bool to INT
- I don't like an automatic conversion.
We could write a conversion function *Bool01* (the shortest name I could think... - 11:48 CoCoA-5 Feature #131: Conversion from bool to INT
- Though I didn't say so explicitly previously, I believe that a truly *automatic* conversion from @BOOL@ to @INT@ is l...
- 11:50 CoCoALib Feature #41: Squarefree factorization - overhead
- Oh dear, I keep forgetting to log time here. I'll just make a guess.
20 May 2012
- 13:28 CoCoA-5 Bug #163 (Resolved): RealRootsApprox bombs
- I've modified RealRoots, and it seems to work now.
What puzzles me is that the bug came to light only today, even ... - 12:41 CoCoA-5 Bug #163: RealRootsApprox bombs
- Added a new C5 test file.
The RealRoots code is rather messy; I suppose it should be rewritten in C++. Any volunt... - 11:30 CoCoA-5 Bug #163: RealRootsApprox bombs
- The example I gave contains @FStar@ instead of @F@.
The bug is simply an unwarranted error; JAA does not believe the... - 11:06 CoCoA-5 Bug #163 (Closed): RealRootsApprox bombs
- The following lines produce an *@ERR::SERIOUS@* on my installation...
- 11:25 CoCoA-5 Bug #164 (Closed): CoCoA-5 emacs interface bug (minor): Source & SourceRegion with troublesome filenames
- By accident I created a filename containing a newline.
Sending the file to CoCoA-5 in emacs (by C-c C-f) produced th...
17 May 2012
- 21:41 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- Anna Maria Bigatti wrote:
> So the best is *@IsTrueGCDDomain@* it is the shortest of the type @Is***GCDDomain@ (and ... - 18:32 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- > Almost all our suggestions are rather long; perhaps this does not matter so much? Maybe we should just choose one,...
- 18:12 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- Anna Maria Bigatti wrote:
> Another suggestion: *IsValidGCDDomain* (by L.Robbiano)
I'm not very convinced; I'd... - 17:33 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- John Abbott wrote:
> However, if we regard fields as not "gcd domains" then what name should be use to mean "gcd doma... - 18:38 CoCoA-5 Bug #162 (Closed): RegularityIndex <= 0
- RegularityIndex is not complete/correct...
16 May 2012
- 18:20 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- JAA believes that *@myGcdInField@* was created for the following reason.
In CoCoALib fields satisfy *@IsGCDDomain@... - 16:15 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- > JAA thinks that
> *we can compute GCDs between values of type @RAT@*
> should be equivalent to
> *we can compute GC... - 15:36 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- JAA thinks that
> *we can compute GCDs between values of type @RAT@*
should be equivalent to
> *we can compute... - 15:31 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- There is one other imstance where @myGCDInField@ is called.
*@ex-RingElem1@* attempts to compute a GCD in a field (a... - 15:01 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- JAA modified @RingBase::myGcdInField@ to give error rather than produce a result of 0/1. All CoCoALib tests passed, ...
- 10:16 CoCoALib Support #160: Cleanup doc for rings
- A richer template for the documentation is offered in @empty.txt@ for homogeneity in class descriptions and facilitat...
- 07:46 CoCoALib Support #160 (Closed): Cleanup doc for rings
- Some documentation has already been rewritten.
Check that all files have appropriate links to operations in the righ... - 07:57 CoCoALib Support #161 (New): Convert old "task table" into redmine
- Redmine seems a lot easier to keep up-to-date than our old task table page.
We should then remove the task table and...
15 May 2012
- 22:51 CoCoA-5 Bug #159 (Resolved): Multiplicity sometimes wrong
- 19:54 CoCoA-5 Bug #159 (Closed): Multiplicity sometimes wrong
- It seems to work OK for monomial ideals, but......
- 22:10 CoCoA-5 Bug #158: May AsRAT produce an INT?
- JAA cannot find the manual page for *@AsRAT@* (ditto *@AsINT@*).
The only occurrence in @CoCoAHelp.xml@ is in a @<s... - 21:13 CoCoA-5 Bug #158 (Resolved): May AsRAT produce an INT?
- JAA has checked in the modified defn of *@AsRAT@*.
The question of the names of @AsRAT@ and @IsRational@ remains o... - 17:41 CoCoA-5 Bug #158: May AsRAT produce an INT?
- John Abbott wrote:
> It seems reasonable to me that *@AsRAT@* give either error or a @RAT@ as result -- after all it ... - 15:16 CoCoA-5 Bug #158: May AsRAT produce an INT?
- JAA has modified the defn of *@AsRAT@* so that it returns a @RAT@ even if the arg given was an @INT@. All the CoCoA-...
- 15:04 CoCoA-5 Bug #158: May AsRAT produce an INT?
- JAA was wondering how to convert a value of type @INT@ into the equivalent value of type @RAT@. Recall that arithmet...
- 14:56 CoCoA-5 Bug #158: May AsRAT produce an INT?
- *@AsRAT@* is defined at lines 31--39 of the file @NotBuiltin.cpkg5@.
[updating the defn should be pretty easy]
*B... - 14:51 CoCoA-5 Bug #158: May AsRAT produce an INT?
- It seems reasonable to me that *@AsRAT@* give either error or a @RAT@ as result -- after all it is a sort of "cast". ...
- 16:52 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- In CoCoALib we have the function @myGcdInField@, so we can compute gcd of elements in RingQQ. So, what shouldwe do i...
- 16:17 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- The code now works: *@type(gcd([2,3,4])@* is of type @INT@.
Also @lcm@ has been fixed accordingly.
It does not se... - 15:32 CoCoA-5 Bug #110 (Resolved): Surprise return type for GCD of a list of ints
14 May 2012
- 15:03 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- Anna thinks she can fix the reading of homogeneous lists; she will look into it in the next few days.
- 14:06 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- JAA thinks that introducing a separate name for the function for computing GCD of integers is a *bad* idea because it...
- 12:23 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- JAA proposes that reading of homogeneous lists have three possible return types:
* list of @INT@
* list of @RAT@
*... - 12:14 CoCoA-5 Bug #110: Surprise return type for GCD of a list of ints
- Today some students passed with a CoCoA-5 problem which derived from the unexpected return type of *@gcd@* applied to...
- 14:45 CoCoA-5 Bug #158 (Closed): May AsRAT produce an INT?
- What type should the result of *@AsRAT(3)@* have?
At the moment @AsRAT@ returns an *@INT@* if its arg is of type *...
11 May 2012
- 19:01 CoCoALib Bug #155 (Closed): gcd: multivariate over non-prime finite field
- 12:36 CoCoALib Support #75: Documentation review by Caleo
- Alessandra reports that the doc for *@PPMonoid@* did not explain clearly what a PPMonoid is, nor why CoCoALib offers ...
10 May 2012
- 18:34 CoCoALib Bug #135 (In Progress): Revise interface to SmallFpImpl & friends
- 18:34 CoCoALib Bug #135: Revise interface to SmallFpImpl & friends
- Added fns equivalent to many of the procedures for arithmetic.
Needed to add several other fns. Development proce... - 18:16 CoCoALib Feature #157: Separate ThreadsafeCounter from symbol.C
- Consider making a BOOST-free (and possibly non-threadsafe) version so that CoCoALib can be compiled without requiring...
- 16:40 CoCoALib Feature #157 (Closed): Separate ThreadsafeCounter from symbol.C
- The *@ThreadsafeCounter@* recently added to @symbol.C@ will be useful elsewhere (_e.g._ in rings for the ring counter...
- 17:16 CoCoALib Feature #156: Brand new symbol(s)
- It is simpler to move the "special" ctor into the private zone, and remove the *@AnonymousMarker@*. This should take...
- 16:48 CoCoALib Feature #156: Brand new symbol(s)
- Check through existing code, and use anonymous symbols where appropriate. Then check everything!
- 16:38 CoCoALib Feature #156: Brand new symbol(s)
- I have opted not to implement *@IsAnonymous@* because I cannot think of when it might actually be useful.
The curr... - 15:53 CoCoALib Feature #156 (In Progress): Brand new symbol(s)
- JAA has completed a first impl. The new public fns (pseudo-ctors) are:
* *@NewSymbol()@* which creates a single new... - 15:44 CoCoALib Bug #155 (Resolved): gcd: multivariate over non-prime finite field
- A first impl of nameless symbols together with a change to line 1480 in @TmpGReductor.C@ has solved the problem.
A...
09 May 2012
- 17:18 CoCoALib Feature #156: Brand new symbol(s)
- The current suggestion for imlpementation is the following:
* internally an anonymous symbol has empty head
* the p...
08 May 2012
- 14:32 CoCoALib Feature #142: Improve threadsafety
- Anna Maria Bigatti wrote:
> *@Elim@* (and a few other functions) create a temporary ring.
Yes. Temporary rings are ... - 12:48 CoCoALib Feature #142: Improve threadsafety
- John Abbott wrote:
> No doubt the problem is due to the temporary rings (inside @Elim@) not self destroying when the... - 09:49 CoCoALib Feature #156: Brand new symbol(s)
- JAA suggests that internally the head of an "anonymous" symbol be the empty string; the accessor function then checks...
07 May 2012
- 18:43 CoCoALib Feature #156: Brand new symbol(s)
- John Abbott wrote:
> Here are some more proposals for the head: *@??@* or *@#@* or *@_@*
>
> (...)
>
> Right now ... - 17:15 CoCoALib Feature #156: Brand new symbol(s)
- Here are some more proposals for the head: *@??@* or *@#@* or *@_@*
Printed value would look like: *@3*??[17]^... - 17:01 CoCoALib Feature #156: Brand new symbol(s)
- This is hardly important, but might be beneficial in a multithreaded environment. Possibly it would be "cleaner" too...
- 16:58 CoCoALib Feature #156: Brand new symbol(s)
- Here are 3 proposals for new PPMonoid pseudo-ctor signatures:...
- 16:54 CoCoALib Feature #156: Brand new symbol(s)
- JAA's first suggestion is to create "gensyms" containing a single index (in the hope that the index will not overflow...
- 16:46 CoCoALib Feature #156 (Closed): Brand new symbol(s)
- The pseudo-ctors for PPMonoids all require that names be specified for the indets.
It can occur that we want to cr... - 17:06 CoCoALib Bug #155: gcd: multivariate over non-prime finite field
- The guilty line is 1480 in *@TmpGReductor.C@*
My example used an unindexed *@x@* in the field of coeffs -- this tri... - 16:08 CoCoALib Bug #155 (Closed): gcd: multivariate over non-prime finite field
- GCD produces an unexpected error. Here is an example:...
- 15:46 CoCoALib Feature #40: Squarefree factorization - Alessio d'Ali`
- Alessio has started writing his report on Bernardin's article.
There are some typos in the article. JAA has given... - 14:30 CoCoALib Bug #154 (In Progress): GCD normalization (e.g. monic)
- GCDs in a poly ring over a field are defined only upto a constant factor.
If the field is a FractionField then there... - 12:47 CoCoALib Feature #50: Polynomial content
- The function *@ContentWRT@* gives result with strange scale factors sometimes....
- 11:59 CoCoALib Feature #69 (Closed): p-th root
- This issue has effectively been replaced by #107.
- 11:57 CoCoALib Feature #107: Recognizing finite fields
- Should there also be a fn called *@PthPower@*?
I note that *@IsPthPower2@* and *@PthRoot2@* have become forgotten;...
04 May 2012
- 21:38 CoCoALib Feature #153: Shorter simpler names for some bool3 values and functions
- Spent about 45 mins discussing with Anna. Differences of opinion remain.
- 21:36 CoCoALib Feature #153 (Closed): Shorter simpler names for some bool3 values and functions
- We need shorter names for *@IsDefinitelyTrue@* and *@IsDefinitelyFalse@*.
Also need a shorter way of expressing th... - 21:30 CoCoALib Feature #138: Automatic conversion from bool3 to bool?
- I have modified *@operator<<@* for OpenMath streams so that they handle explicitly machine integers (rather than *@Ma...
- 12:36 CoCoALib Support #75: Documentation review by Caleo
- Alessandra reports:
* the examples 2,3,4 of *@ex-RingWeyl@* are almost identical -- this cannot be what is intended!
... - 12:13 CoCoALib Feature #152 (Closed): Replace bool3 by tribool
- In some quiet moment switch to using BOOST's *@tribool@* (or C++11 equivalent if it exists).
It seems pointless try...
03 May 2012
- 15:32 CoCoALib Feature #151: Iterated CanonicalHom
- There is already some code called *@TmpChainCanonicalHom@* in @CanonicalHom.[HC]@: it looks whether there is a "chain...
- 15:25 CoCoALib Feature #151 (New): Iterated CanonicalHom
- Implement *@NaturalMap@* and iterated *@CanonicalHom@*
- 15:26 CoCoALib Feature #150: RingOf rather than owner? (and than AmbientRing, ...)
- *@RingOf@* can be applied to: ideal, RingElem, matrix, HomogList.
- 15:03 CoCoALib Feature #150 (In Progress): RingOf rather than owner? (and than AmbientRing, ...)
- In CoCoA-5 to get the ring to which a RingElem belongs we use the fn *@RingOf@*.
Currently in CoCoALib the analogous...
02 May 2012
- 19:37 CoCoALib Bug #149 (New): Makefile dependencies
- There are problems with dependencies for optional external libraries.
How to make these dependencies visible only ... - 18:07 CoCoA-5 Bug #148 (In Progress): C-c C-p in emacs goes to wrong line
- In emacs when an error occurs running code sent via C-c C-f (effectively "source") the user can use C-c C-p to go to ...
01 May 2012
- 11:44 CoCoALib Feature #147 (In Progress): Buchberger-Moeller: impl via modular reduction
- Impl the idea presented in AKR "Zero-dim Schemes" which uses modular reduction to get the form of the answer quickly ...
- 11:39 CoCoALib Feature #146 (New): Buchberger-Moeller: input conversions
- Variants of BM which accept more convenient input (e.g. points or 0-dim ideals).
Simply convert inputs to sets of ... - 11:37 CoCoALib Feature #145 (New): Buchberger-Moeller: fast modular impl
- Impl BM over a small prime finite field. Aim for speed.
Input ideals are represented as multiplication matrices (... - 11:35 CoCoALib Feature #144 (Closed): Buchberger-Moeller: generic impl
- Implement generic BM algorithm over any field.
Aim is to make impl clean rather than fast.
Each input ideal is re... - 10:17 CoCoALib Feature #143 (In Progress): Buchberger-Moeller (parent task)
- Robbiano wants to have Buchberger-Moeller in C5. It makes most sense to implement it in CoCoALib and then make it vi...
30 Apr 2012
- 17:58 CoCoALib Feature #142: Improve threadsafety
- If ref counting is removed (seems to be highly desirable to avoid it in multithreaded programs) then CoCoALib needs t...
- 17:51 CoCoALib Feature #142 (In Progress): Improve threadsafety
- Currently CoCoALib can be made (largely?) threadsafe by compiling with the flag *@-DCoCoA_THREADSAFE_HACK@*. As its ...
- 17:52 Bug #141 (Closed): Memory leak using Elim in C5
- 17:44 Bug #141: Memory leak using Elim in C5
- I was running a CoCoA-5 compiled with *@-DCoCoA_THREADSAFE_HACK@*. The leaks I observed disappeared when I removed t...
- 16:32 Bug #141 (Closed): Memory leak using Elim in C5
- The following code has the symptoms of a memory leak (grows to about 650Mbytes):...
27 Apr 2012
- 16:29 CoCoALib Feature #125: Matrix equation solving; linear system solving
- Implemented the chosen names.
Created/corrected CoCoALib doc for the new fns.
Added CoCoALib example program *@ex-m... - 15:06 CoCoALib Feature #125: Matrix equation solving; linear system solving
- A quick count using Google suggests that *@LinSolve@* as about twice as popular as *@MatSolve@*. Anna points out tha...
- 15:00 CoCoALib Feature #50: Polynomial content
- Tests and doc are already done for CoCoA-5.
Still missing in CoCoALib - 12:49 CoCoALib Support #75: Documentation review by Caleo
- Alessandra reports
* finished *@BigInt@*, *@BigRat@* and *@MachineInt@* (doc and examples)
* *@bool3@* doc was poor; ... - 12:14 CoCoALib Support #140 (Closed): Doc & example for convert
- Alessandra reported (some time ago) that the doc for *@convert@* was rather unclear -- she could not figure out how t...
- 12:10 CoCoALib Feature #138: Automatic conversion from bool3 to bool?
- John Abbott wrote:
> The BOOST equivalent of @bool3@ is called @tribool@. It offers automatic conversion to and from... - 11:30 CoCoALib Feature #139 (Closed): Usefulness of ring casting fns (remove AsPolyRing, etc.)
- Caleo pointed out that it is unclear what *@AsFractionField@* does.
JAA has already noticed that it is a nuisance ha... - 10:50 CoCoALib Bug #135: Revise interface to SmallFpImpl & friends
- Confirmed need for major redesign.
Current main doubt is how public I should be about the type *@SmallFpImpl::valu...
26 Apr 2012
- 16:18 CoCoALib Feature #51: polynomial coefficient extraction w.r.t. variable
- After talking to AMB, it seems best to "forget" the general function for the time being (until we have a genuine need...
- 16:14 CoCoALib Feature #51: polynomial coefficient extraction w.r.t. variable
- John Abbott wrote:
> We need a good name for this fn. The name @CoefficientsWRT@ would be fairly good, but could be ...
24 Apr 2012
- 17:09 CoCoALib Feature #138 (Closed): Automatic conversion from bool3 to bool?
- The BOOST equivalent of @bool3@ is called @tribool@. It offers automatic conversion to and from @bool@.
I have al... - 16:08 CoCoALib Feature #107: Recognizing finite fields
- Added C5 documentation for @IsFiniteField@, @LogCardinality@, @IsPthPower@ and @PthRoot@.
JAA wonders whether *@Ext... - 14:58 CoCoALib Feature #107: Recognizing finite fields
- JAA now believes that he has a decent algorithm for testing a polynomial ideal for maximality. As prerequisite it ne...
- 15:35 CoCoA-5 Bug #137: JAA does not like the name IndetInd
- If we change to "subscript" instead of index then we must change the name of the "index" field in the result of @Inde...
- 15:28 CoCoA-5 Bug #137 (Closed): JAA does not like the name IndetInd
- C5 inherited from C4 the name @IndetInd@. It is the function which produces a list of "indices" from a indet, _e.g._...
- 14:52 CoCoALib Feature #51: polynomial coefficient extraction w.r.t. variable
- JAA thinks that the most useful form of @CoeffsWRTBasis@ is one where the basis is an ordered set of PPs. Mathematic...
- 11:33 CoCoALib Feature #51: polynomial coefficient extraction w.r.t. variable
- Part of this task has already been solved by #90 @CoefficientsWRT@.
JAA now needs a fn which converts a polynomial i... - 11:17 CoCoALib Slug #129: Better GCD
- I cleaned the code so that it leaks less memory now.
The cleaning was a consequence of some other development.
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