Activity
From 12 Jun 2018 to 11 Jul 2018
02 Jul 2018
- 18:42 Feature #1198: Non-standard DegRevLex (NonStdDegRevLex, WDegRevLex)
- Here are some thoughts about the design/impl.
If the GradingDim is 1 then we have a vector of positive "weights": ...
28 Jun 2018
- 11:36 Bug #1199: GCD bug with high degree arg
- After discovering the _magic prime_ it became clear that the problem is in the computation of the syzygies (the polyn...
- 11:00 Bug #1199 (In Progress): GCD bug with high degree arg
- I wrote a program to try all primes in increasing order. None up to about 12000. Then restarted from 30000, and fou...
- 10:54 Bug #1199 (Closed): GCD bug with high degree arg
- ...
27 Jun 2018
- 15:17 Feature #1198: Non-standard DegRevLex (NonStdDegRevLex, WDegRevLex)
- In particular we should have a dedicated @OrdvArith@ implementation for it.
This should make @exponents@ faster, a... - 15:08 Feature #1198 (New): Non-standard DegRevLex (NonStdDegRevLex, WDegRevLex)
- There is a family of cases where a "DegRevLex" ordering with "non-standard" weights is useful.
This can be implement...
26 Jun 2018
- 15:25 Feature #82: C++11 compatibility questions
- I read somewhere on the internet that it is probably better to jump straight to C++14 rather than to C++11; the argum...
- 14:40 Feature #1197 (In Progress): IsZeroDet: new fn
- Implement @IsZeroDet@ which should allow a fast modular impl.
- 14:38 Slug #691: Matrix determinant over ZZ
- CoCoALib currently uses DetByCRT rather than the "clever" algorithms used in CoCoA-4.7. This issue should be about p...
- 14:32 Slug #1110 (Feedback): Determinant of matrix over QQ (whose entries are actually integers)
- Done as part of work on Habilitationsschrift.
Now both dets take about 1.8s - 11:51 Design #1124: Move examples directory into doc -- or just change makefile?
- One problem is that the @Makefile@ in the @examples/@ directory states explicitly that all executables depend on @CoC...
- 11:31 Support #1196 (Closed): Split MatrixOps
- Consider splitting the file @MatrixOps.C@ into subfiles with the same prefix. Currently it is over 2000 lines long.
- 11:29 Slug #1187: Matrix rank is slow (over QQ)
- Rank is slower than det even for matrices over a small finite field.
For example a random 500x500 matrix: det takes ...
25 Jun 2018
- 00:43 Support #1195 (Rejected): Release: CoCoALib-0.99580 (together with CoCoA-5.2.4)
- 00:39 Design #1177: File names: use "SparsePolyOps" prefix for pertinent files
- I think the content of @SparsePolyOps.C@ (the original ;-) should be now moved into @SparsePolyOps-RingElem.C@ becaus...
- 00:31 Feature #1178 (Feedback): New function: myPrimaryDecomposition_0dim
- Done a long time ago, in april 2018
- 00:28 Slug #1009 (Feedback): coefficients for MinPoly e Frobenius
- Done a long time ago, april 2018
- 00:27 Feature #901 (Feedback): New function: PrimaryDecomposition0 in CoCoALib
- Done a long time ago, in april 2018 (for implementing factor on algebraic extensions).
- 15:28 Feature #4 (In Progress): Squarefree GCD-free basis
- Is this not subsumed by issue #259?
The only remaining question is the "squarefree" part. We could just make the ... - 15:25 Feature #259: Squarefree(?) GCD-free basis
- I have checked in the code. There is doc, but no tests.
I am not happy with the class names: *@GCDFreeBasis_BigIn... - 15:06 Design #1159 (Closed): Add global enum "verify/DontVerify"
- This issue has been subsumed by #1167. Closing!
- 14:37 Design #1182 (Feedback): "mod" for BigInt
- Anna has not complained, so moving to *@Feedback@*.
- 14:10 Feature #1154 (Feedback): SmallFpImpl: new ctor arg to say do-not-check-that-arg-is-prime
- I think that @SmallPrime@ solves this matter reasonably well. It does require making 2 ctors (copy-and-paste), but t...
21 Jun 2018
- 22:39 Feature #259 (Resolved): Squarefree(?) GCD-free basis
- I have impls of GCDFreeBasis for RingElem and for BigInt.
Not yet checked in/ No tests; one simple example. - 15:39 Support #1193: Naming convention mistakes
- In *@BigIntOps@* there are @quorem@ and @divexact@ (names "inherited" from GMP); but there is also @QuoRem@ in anothe...
- 15:38 Support #1193 (New): Naming convention mistakes
- I have noticed some functions whose names do not follow the naming conventions: _e.g._ *@quorem@* and *@divexact@*
...
19 Jun 2018
- 10:56 Slug #1187: Matrix rank is slow (over QQ)
- A potentially fast heuristic is to reduce mod p and compute the rank of the reduced matrix. This should be quick; if...
- 10:50 Slug #1187 (New): Matrix rank is slow (over QQ)
- The rank function is too slow:...
14 Jun 2018
- 21:04 Design #832: Generalize grading matrix
- I have just started working on an implementation of isomorphic-to-subring. For example, given @QQ[x,y,z]@ it should ...
- 17:28 Bug #935 (Feedback): ElimMat, ElimHomogMat: complain about zero or negative weights
- Anna says that @ElimMat@ should allow a grading mat with 0 rows, but @ElimHomogMat@ should not.
I have adjusted the ... - 16:16 Bug #935 (In Progress): ElimMat, ElimHomogMat: complain about zero or negative weights
- What is the status of this issue?
What do we allow as "grading matrices"?
Current code requires entries to be int... - 16:48 Design #1159: Add global enum "verify/DontVerify"
- Close this issue and refer to #1167?
- 16:29 Slug #1181 (Feedback): CpuTime is costly!
- Changing to *feedback* even though there is scope for improvement.
It seems to be difficult to do this properly in... - 15:53 Feature #202: MatrixView/function for viewing a single row or column (RowMat, ColMat)
- I have just checked the code: it is in @MatrixView@ (as one would expect).
I am not so happy about the names *@Row...
12 Jun 2018
- 18:35 Feature #1155 (Feedback): Create a new "prime source" iterator
- Time to move to feedback.
Only remaining doubt: the function @NextPrime@ needs to be reconsidered (what happens wh... - 18:32 Feature #1131 (Feedback): Sturm sequence
- Works OK in ad hoc testing -- fixed a couple of bugs.
- 18:25 Feature #1176 (In Progress): interval arithmetic
- A first prototype is in *@BigRatInterval@*
I have even written some doc!
- 18:22 Design #1145: File names, coding conventions: Fns, Ops, Operations? part 2
- I have renamed the doc files too.
- 18:20 Design #410: New file: BigRatOps
- I have split the sources (or did Anna do it?). Updated the doc, and all other files.
- 18:18 Design #1180 (Closed): BigRat(0) unexpectedly compiles! (calls ctor with mpq_t arg)
- I have sorted out the doc.
- 16:50 Bug #1130 (In Progress): SqFreeFactor: should it work over ZZ?
- One potential problem is that strictly speaking the content must be factorized too, and it is costly to tell whether ...
- 16:30 Design #764 (Resolved): ExternalLib: simplify configuration
- Can we close this?
- 16:22 Design #1162 (Feedback): Check semantics of NoSmallFactorSeq
- I have no ideas for improving this currently. So have moved to "feedback".
- 15:58 Bug #1185 (Feedback): factor: multivariate, wrong RemainingFactor (sign wrong)
- I have tested my change -- seems fine.
Checked in.
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