Activity
From 21 Sep 2020 to 20 Oct 2020
20 Oct 2020
- 12:59 Slug #897: SimplestBigRatBetween: why is it so slow?
- Here is the speed test I used:...
- 11:39 Slug #897: SimplestBigRatBetween: why is it so slow?
- I have now put special handling in for reciprocals, and the code runs a bit faster.
Probably the best solution wou...
19 Oct 2020
- 17:38 Slug #897 (In Progress): SimplestBigRatBetween: why is it so slow?
- The profiler suggests that the reciprocal @1/(myFrac-myQuot)@ is surprisingly costly.
I shall modify @operator/@ to ... - 15:22 Slug #897: SimplestBigRatBetween: why is it so slow?
- Why did I give no examples to test this on?
After reading #860, a possible test might be... - 14:48 Feature #1513 (New): Better test for univariate-ness (and better conversion)
- Issue #1118 exhibits a slug due to "stupid" conversion from a sparse multivariate poly to a dense univariate poly.
... - 12:33 Slug #1118 (In Progress): SLUG: factorization of x^9999
- The quadratic behaviour derives from the GCD computation being between *dense* univariate polynomials.
A solution ... - 12:05 Slug #1118: SLUG: factorization of x^9999
- I confirm that computation time increases quadratically (why?)
Also current (2020-10-19) speed is about the same as ...
14 Oct 2020
- 21:51 Design #1511 (Closed): Use C++14 constexpr
- Scott Meyers recommends using @constexpr@ where (reasonably) possible.
- 21:49 Feature #1488: BuiltIn Interreduce-Function
- I have commented out @interreduce@.
I have renamed the files to @SparsePolyOps-interreduced@.
*NOT YET DOCUMENTED... - 21:48 Support #1510 (New): Documentation for SparsePolyOps?
- Where should the doc for fns in @SparsePolyOps-*@ files go?
The current organization is inconsistent :-(
- 21:38 Support #1499 (Resolved): factorization: allow zero as exponent?
- I have implemented as decided (_i.e._ mults must be positive)... effectively we are rejecting the original proposal.
... - 11:17 Support #1499: factorization: allow zero as exponent?
- I now prefer not to allow 0 as a multiplicity because it could be confusing: _e.g._ someone might call @myAppend(fac,...
- 21:21 Design #1500 (Feedback): IsDivisible in a field?
- There are now 20 different @IsDivisible@ functions (half of them are actually @IsDivisible_AllowFields@).
I have m... - 20:21 Design #1500: IsDivisible in a field?
- Oh wow! There are a lot more @IsDivisible@ finctions than I thought... :-(
*SERIOUS QUESTION*
What should the fo... - 10:59 Design #1500: IsDivisible in a field?
- Today my preference is for *@IsDivisible@* and *@IsDivisible_AllowFields@*.
I think these names are fairly clear, an... - 15:40 Design #1446 (In Progress): Start using C++14 "move" capability
- Here are some fns to consider changing:
* @myCharacteristic@
* others???
- 15:35 Feature #24 (Rejected): object files collected in one directory
- What we have currenyl works well enough (most of the time), and has been stable for quite a while (at least 3 years)....
- 12:03 Feature #24: object files collected in one directory
- Do we really want to overhaul the current @Makefile@ structure?
I do not recall any problems lately, and am loath to... - 14:22 Design #1391: RingElems: syntax with [ and ] ?
- Note that we have @CoeffVecWRT@ and @CoeffListWRT@. So it would be reasonable to call the CoCoALib fn *@RingElemVec@*.
- 11:54 Design #1391: RingElems: syntax with [ and ] ?
- Should *@RingElemList@* be ported into CoCoALib? (perhaps with a different name?)
If so, what should it be called?
... - 14:06 Design #1462 (Closed): Change CoCoA_ERROR into CoCoA_THROW_ERROR
- Effectively removed old macro *@CoCoA_ERROR@* (still exists, but triggers compile-time error saying to use @CoCoA_TH...
- 13:26 Design #950: factor and SmoothFactor for integers --> FactorINT, FactorINT_TrialDiv, FactorINT_PollardRho
- I have just checked what the code currently does: if many primes have been tried without finding a factor *and* if t...
- 12:52 Bug #15: Adjoint of a non-invertible matrix
- This now works (since when?).
Surely the impl for @adj@ can be improved; there are several later issues about adj to...
12 Oct 2020
- 20:52 Design #1500: IsDivisible in a field?
- I still like the idea of a 3rd param (or perhaps two fns with similar names).
My preference is that a call like @IsD...
09 Oct 2020
- 21:19 Design #1500: IsDivisible in a field?
- Also @ex-RingElem1@ fails...
- 20:06 Design #1500: IsDivisible in a field?
- A comment about the code excerpt in comment 4. The call to @IsZeroDivisor@ is superfluous; perhaps it was put there ...
- 11:03 Design #1500: IsDivisible in a field?
- I have tried implementing the change (_i.e._ @IsDivisibile@ throws if given args in field).
Two tests fail: @test-Is... - 09:19 Design #1500: IsDivisible in a field?
- This is a bit less clear than I had previously thought. In the file @ring.C@ the function @IsDivisible@ (with 3 args...
- 14:16 Support #1452 (Closed): Release CoCoALib-0.99710
- 14:12 Feature #1395 (Closed): SHA checksum for released code
- 13:54 Design #1221 (Closed): Reconsider design for accessing headers and libs of external libraries
- Closing because the current design seems to work well (and has not changed for many months).
Surely the recorded t... - 13:27 Support #1499: factorization: allow zero as exponent?
- John Abbott wrote:
> My current feeling is that I should simply change the error mesg, and leave the rest as is: nam... - 11:11 Support #1499: factorization: allow zero as exponent?
- If we allow 0 as a multiplicity when calling @myAppend@ then it should also be allowed in the ctor call which accepts...
08 Oct 2020
- 12:35 Design #1500 (In Progress): IsDivisible in a field?
- I am becoming increasingly convinced that it is better to throw an error if the args are in a field (since it makes l...
07 Oct 2020
- 22:11 Slug #722 (Closed): valuation slow for large inputs
- The current impl is "good enough" for the moment. If a specific application comes up where more speed is needed then...
06 Oct 2020
- 15:42 Design #855: Copyright and authorship?
- We should do this in an orderly manner. Many files have already been done. It would be nice to finish this for 0.99...
- 15:39 Design #1242: C++14: Use type auto where appropriate
- I suggest we work through the source file systematically, and note which ones we have updated to use *@auto@* (and wh...
- 15:35 Bug #1473: isystem not working as expected
- *Anna?* is this better for you now?
I'm pretty sure I must have checked in the change mentioned here. Do you still... - 15:20 Design #1279 (Resolved): Tidy up code for matrix determinant
- Main dispatch fn is *@ConstMatrixViewBase::myDet@* around @matrix.C:221@
The code has already been considerably c... - 15:16 Design #1460 (Feedback): Name of TensorMat; change to KroneckerProd?
- This has already been done.
@TensorMat@ is now in @obsolete.C@
Was this already in 0.99710?
- 14:57 Design #1221 (In Progress): Reconsider design for accessing headers and libs of external libraries
- I wonder exactly what I had in mind when creating this issue.
The current situation is as follows: in @ExternalLib... - 14:41 Feature #1485: Simple syntax for making a quotient ring?
- As this is not urgent, I'm postponing it.
I also expect it to be trivial to implement should we decide to do so.
- 12:24 Design #710 (In Progress): Update normaliz interface?
- The current version of CoCoALib compiles fine with normaliz-3.8.9.
It is no longer clear me to what exactly this i... - 12:21 Bug #1280: Determinant & Inverse of matrix over non integral domain
- This question clearly needs more work -- postponing.
- 12:20 Bug #1280: Determinant & Inverse of matrix over non integral domain
- Now @det@ of a matrix over @ZZ/(6)@ work also for larger matrices, but it is horribly slow :-(...
- 12:11 Feature #743: Better errors: give supplementary info about the error
- I am postponing even though this is urgent. I need a quiet period to be able to think about the problem, and to find...
- 12:08 Design #1414: Make class RingElemVector?
- I am postponing, but also increasing priority.
I think this idea will be quite useful, but we need more time to th... - 11:35 Design #1391: RingElems: syntax with [ and ] ?
- I have changed *@RingElemList@* (in @NotBuiltin.cpkg5@).
I have added a new test @test-RingElems.cocoa5@ with the te... - 10:22 Support #1499: factorization: allow zero as exponent?
- The current interface for @FactorMultiplicity@ does not use a @factorization@.
Even if an alternative interface (lik... - 09:53 Feature #1490 (Rejected): New function: MinusOneToPower
- *REJECTED*
There is no need for *@MinusOneToPower@*; it can be achieved by *@SmallPower@* (if we want to avoid @Bi...
05 Oct 2020
- 14:39 Feature #1436 (Feedback): Flatten for a matrix
- I have added a test to @test-matrix4.C@
- 14:32 Design #1500: IsDivisible in a field?
- This might be a bit like computing gcd: strictly we can define it for a field, but we opted instead to give an error....
- 14:29 Design #1500 (Closed): IsDivisible in a field?
- What should @IsDivisible(a,b)@ do with arguments in a field?
Currently it returns the same as @not(b = 0)@.
This ... - 13:26 Support #1499 (In Progress): factorization: allow zero as exponent?
- My current feeling is that I should simply change the error mesg, and leave the rest as is: namely, multiplicities mu...
- 13:23 Support #1499 (Closed): factorization: allow zero as exponent?
- A factorization object in CoCoALib contains a list factor-multiplicity pairs.
According to the doc the factors must ... - 13:08 Feature #664: Impl small non-prime finite fields (using logs)
- I'd like to have the time to finish this, but that seems very unlikely in the immediate future. :-(
Postponing (yet... - 13:03 Design #1391: RingElems: syntax with [ and ] ?
- I would like to see a minor improvement: allow whitespace before the initial *@[@* and after the final *@]@*.
It wil... - 11:58 Design #1463 (Feedback): SmoothFactor: use FactorMultiplicity
- Now I think it is better not to make *@DivideOutMaxPower@* public; we can wait until there is actual demand for it.
... - 11:40 Feature #1490: New function: MinusOneToPower
- Now I am having doubts about this function...
The normal @power@ function just calls @mpz_power@, and I fully expe...
03 Oct 2020
- 17:41 Feature #1490 (Resolved): New function: MinusOneToPower
- I have implemented *@PowerOfMinusOne@* (for both @MachineInt@ and @BigInt@ exponents).
Currently they are not inline... - 17:27 Feature #1488 (Resolved): BuiltIn Interreduce-Function
- The function is called *@interreduced@*: it returns an interreduced *copy* of the original list (which is not changed...
02 Oct 2020
- 21:46 Feature #1405 (Closed): New fn: interreduction
- Closed because this is a duplicate of #1488
- 20:56 Feature #1436: Flatten for a matrix
- I have checked in the code.
The fn names are *@FlattenByRows@* and *@FlattenByCols@*; it seems unnecessary to have @... - 17:03 Feature #1436 (Resolved): Flatten for a matrix
- I have written a first impl (in @MatrixOps-flatten.C@).
Added doc.
No tests yet.
- 20:32 Support #1497 (New): Doc for normaliz fns
- We need some doc for the normaliz functions!
- 20:30 Support #1494 (Resolved): Normaliz 3.8.9
- I have refreshed the script @normaliz-version.sh@ and updated @configure@ to use it and check that the version is at ...
30 Sep 2020
- 14:08 Support #1494: Normaliz 3.8.9
- Now it compiles for me. But I did not find any doc about which functions CoCoALib/CoCoA-5 make available when Normal...
- 11:57 Support #1494 (In Progress): Normaliz 3.8.9
- I have made the change, and CoCoALib now compiles, but I do not know whether it really does what people might expect....
- 11:14 Support #1494: Normaliz 3.8.9
- I have changed the include directives to include only *@libnormaliz/libnormaliz.h@* which includes all Normaliz heade...
- 11:09 Support #1494 (Closed): Normaliz 3.8.9
- At the moment CoCoALib is *not compatible* with Normaliz 3.8.9 (recently released, late Sept 2020).
Making it comp...
29 Sep 2020
- 13:19 Feature #562: Subrings
- Which sorts of subring would we like to represent?
* *(A)* in a polyring a subring generated by a subset of the inde... - 13:12 Feature #1468 (In Progress): Adjoin indets to a poly ring
- What should new indets be called? Should they be "new symbols"? Advantage is that there could be no problems with n...
28 Sep 2020
- 13:51 Feature #1492: submat of a submat
- The reason for thinking of this is that the current impl of *@DetByMinors@* is disaapointingly slow on @IdentityMat(Q...
- 13:48 Feature #1492 (New): submat of a submat
- It might be worth refining the impl of *@submat@* so that @submat(submat(M,R1,C1),R2,C2)@ is "clever" and returns a s...
25 Sep 2020
- 17:44 Feature #1490 (In Progress): New function: MinusOneToPower
- It would be tricky to call the function @power@ because I want the return type to be @long@ (or even @int@) rather th...
- 16:21 Feature #1490: New function: MinusOneToPower
- John Abbott wrote:
> There is a very simple inline impl:
> [...]
>
> If we do accept this fn, in which (header) ... - 13:37 Feature #1490: New function: MinusOneToPower
- There is a very simple inline impl:...
- 13:35 Feature #1490 (Rejected): New function: MinusOneToPower
- I have just seen in the code for matrix adjoint *@power(-1, i+j)@*.
It would be nice to have a simpler function for ... - 17:06 Feature #1436: Flatten for a matrix
- it is only used in *RingElem MinPoly(ConstMatrixView M, ConstRefRingElem x)*.
- 11:13 Feature #1436: Flatten for a matrix
- Some notes:
* *(A)* there are already the functions @GetRows@ and @GetCols@ which return a @vector<vector<RingElem>>... - 16:58 Bug #1423 (Closed): Radical 0-dim NYI? missing case for GBasisByHomog
- John Abbott wrote:
> *CHECKED ON 2020-09-25* the example in the description now works.
>
> Has this been fixed? ... - 11:18 Bug #1423 (In Progress): Radical 0-dim NYI? missing case for GBasisByHomog
- *CHECKED ON 2020-09-25* the example in the description now works.
Has this been fixed? By whom? Can we close th... - 16:16 Feature #1472: Idea for for loops
- just wondering: (I know it's low priority) is this any better than the standard syntax?
- 11:04 Feature #1472 (In Progress): Idea for for loops
- Anna's suggestion of *@range(1,n)@* _etc._ seems simple, clear, flexible.
The intention is that both values are incl... - 15:16 Support #1263 (Resolved): Tidy CoCoALib test directory
- I have now merged all "exbugs" into a single file called *@test-exbugs.C@* (with corr expected output in @test-exbug...
- 14:58 Bug #1331: adj: for matrices 7x7 and bigger
- I have added a test to @test-bug1.C@
- 14:52 Bug #1331: adj: for matrices 7x7 and bigger
- Now I have split @DetDirect@ into two fns: one generic and one for sparsepolyrings (where I can use geobuckets)
- 14:35 Bug #1331 (Resolved): adj: for matrices 7x7 and bigger
- There were two problems:
* *(A)* the dispatch function @ConstMatrixViewBase::myDet@ in @matrix.C@ was rather crude
... - 14:05 Design #1491 (New): Unified Gaussian reduction impl
- It would be nice to make a single unified Gaussian reduction impl (if poss).
Anyway, currently there are too many im... - 14:02 Support #1196 (Resolved): Split MatrixOps
- This is now mostly done.
There are now 7 files: original, adj, arith, det, KroneckerProd, LinKerZZ, norms, rank, r... - 11:20 Feature #1405: New fn: interreduction
- Is this a duplicate of #1488?
- 10:51 Design #1463 (Resolved): SmoothFactor: use FactorMultiplicity
- I have made a reasonable impl more or less following *(B)*.
There is a new non-exported fn which computes multiplici...
Also available in: Atom