CoCoA Project

02 Jul 2018

18:42 CoCoALib 0.50 hour (Feature #1198 (New): Non-standard DegRevLex (NonStdDegRevLex, WDegRevLex))

Some thoughts John Abbott

18:42 CoCoALib 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": ... John Abbott

28 Jun 2018

11:00 CoCoALib 1.50 hour (Bug #1199 (Closed): GCD bug with high degree arg)

Looking for simpler example John Abbott

11:00 CoCoALib 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... John Abbott

10:54 CoCoALib Bug #1199 (Closed): GCD bug with high degree arg

... John Abbott

27 Jun 2018

15:08 CoCoALib 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... John Abbott

26 Jun 2018

15:25 CoCoALib 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... John Abbott

15:25 CoCoALib 0.25 hour (Feature #82 (Closed): C++11 compatibility questions)

Better C++14 John Abbott

14:40 CoCoALib Feature #1197 (In Progress): IsZeroDet: new fn

Implement @IsZeroDet@ which should allow a fast modular impl. John Abbott

14:38 CoCoALib 0.25 hour (Slug #691 (Closed): Matrix determinant over ZZ)

Must port the old code John Abbott

14:38 CoCoALib 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... John Abbott

14:32 CoCoALib 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 John Abbott

14:32 CoCoALib 20.00 hours (Slug #1110 (Closed): Determinant of matrix over QQ (whose entries are actually integers))

Already done John Abbott

11:51 CoCoALib 0.25 hour (Design #1124 (Closed): Move examples directory into doc -- or just change makefile?)

Another idea John Abbott

11:51 CoCoALib 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... John Abbott

11:31 CoCoALib Support #1196 (Closed): Split MatrixOps

Consider splitting the file @MatrixOps.C@ into subfiles with the same prefix. Currently it is over 2000 lines long.
John Abbott

11:29 CoCoALib 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 ... John Abbott

11:29 CoCoALib 0.20 hour (Slug #1187 (New): Matrix rank is slow (over QQ))

Slow mod p too John Abbott

25 Jun 2018

15:28 CoCoALib 0.20 hour (Feature #4 (Rejected): Squarefree GCD-free basis)

Subsumed? John Abbott

15:28 CoCoALib 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 ... John Abbott

15:25 CoCoALib 0.25 hour (Feature #259 (Closed): Squarefree(?) GCD-free basis)

Bad names John Abbott

15:25 CoCoALib 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... John Abbott

15:06 CoCoALib 0.15 hour (Design #1159 (Closed): Add global enum "verify/DontVerify")

Subsumed John Abbott

15:06 CoCoALib Design #1159 (Closed): Add global enum "verify/DontVerify"

This issue has been subsumed by #1167. Closing! John Abbott

14:37 CoCoALib Design #1182 (Feedback): "mod" for BigInt

Anna has not complained, so moving to *@Feedback@*.
John Abbott

14:37 CoCoALib 0.10 hour (Design #1182 (Closed): "mod" for BigInt)

Apparently almost done John Abbott

14:10 CoCoALib 1.00 hour (Feature #1154 (Closed): SmallFpImpl: new ctor arg to say do-not-check-that-arg-is-prime)

Resolved John Abbott

14:10 CoCoALib 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... John Abbott