Activity
From 03 Apr 2019 to 02 May 2019
30 Apr 2019
- 17:18 CoCoALib Design #925: MachineInt or long for args which are indices (yet again)
- Postponing because there are too many other more pressing issues. Anyway the current code works adequately, so it is...
- 11:51 CoCoALib Feature #813: Implement "elim" in CoCoALib
- It would be nice to complete this before the next release! To this end, I have increased the priority...
- 10:54 CoCoALib Feature #1277: Gaussian row reduction
- NTL's doc shows just one fn *@gauss@* which accepts 2 args: matrix @M@ and an optional integer @w@ (default is number...
- 10:44 CoCoALib Feature #1277: Gaussian row reduction
- The request seems reasonable to me.
Not yet sure what the best design might be, but I suggest the following as a s... - 10:40 CoCoALib Feature #1277 (Closed): Gaussian row reduction
- Julian Danner (Passau) would like CoCoA to offer matrix row reduction via gaussian elimination.
Discuss, design, i... - 10:35 CoCoA-5 Bug #1273: NewPolyRing and SymbolRange together make a crash
- I must get my CVS access sorted out, so I can check in.
29 Apr 2019
- 21:05 CoCoALib Support #1276: Release 0.99650
- List of principal changes made: *19th november 2019*
* NO LONGER C++03 compatible! We are moving towards C++14 (#89... - 21:03 CoCoALib Support #1276 (Closed): Release 0.99650
- Description
Everything related to making a CoCoALib release:
* Redmine Roadmap: close or postpone issue
* ... - 18:38 CoCoALib Support #1039 (Resolved): Rename iroot?
- I have changed the names into *@FloorRoot@* and *@IsExactFloorRoot@*.
Added *@iroot@* to @obsolescent.H/C@.
Test an... - 13:25 CoCoALib Support #1039: Rename iroot?
- Even though GMP allows negative inputs to its @mpz_root@ function, I like the idea of limiting the number whose root ...
- 18:21 CoCoA-5 Bug #1273: NewPolyRing and SymbolRange together make a crash
- Another problem was in @evalArgAsListOfSymbols@ which did a dynamic pointer cast and used the result without checking...
- 14:21 CoCoA-5 Bug #1273 (Resolved): NewPolyRing and SymbolRange together make a crash
- One problem appears to be on line 46 of @cocolib.cpkg5@: replace *@[i]@* with just *@i@*.
- 14:18 CoCoA-5 Bug #1273: NewPolyRing and SymbolRange together make a crash
- The *@SymbolRange@* impl looks very suspect. It does not properly check its arg types.
Fn is defd in @coclib.cpkg... - 14:14 CoCoA-5 Bug #1273 (Closed): NewPolyRing and SymbolRange together make a crash
- The problem is with double indices. Here is a small failing example:...
- 18:00 CoCoA-5 Slug #1228: SLUG: filling an array
- I think I have found a situation where my simple idea in comment 6 causes trouble......
- 17:53 CoCoA-5 Slug #1275 (New): incr and decr are slow
- The CoCoA-5 functions @incr@ and @decr@ are disappointingly slow....
- 15:26 CoCoA-5 Bug #1274 (Resolved): SortBy and SortedBy sometimes give wrong result
- The bug was at the end of the first loop in *@QuickSortBy1@* where the case @Up = Down@ was not handled.
Added 1 l... - 14:56 CoCoA-5 Bug #1274 (In Progress): SortBy and SortedBy sometimes give wrong result
- Example found by calling @SortedBy@ on random permutations of 1..17.
Seems to work find for lists with only 16 or fe... - 14:53 CoCoA-5 Bug #1274 (Closed): SortBy and SortedBy sometimes give wrong result
- In CoCoA5 the *@SortBy@* and *@SortedBy@* functions sometimes give wrong answers!
Here is an example:... - 13:57 CoCoALib Support #1263: Tidy CoCoALib test directory
- I have noticed that there some tests which run quickly (_e.g._ less than 0.01s on my computer), but the compilation t...
18 Apr 2019
- 18:10 CoCoA-5 Feature #1272: Groebner Bases over ZZ
- Very subtle: it gets to this...
- 17:49 CoCoA-5 Feature #1272: Groebner Bases over ZZ
- @NR@ bug:...
- 17:36 CoCoA-5 Feature #1272: Groebner Bases over ZZ
- As a starting point Elisa Palezzato noticed a bug in @NR@: it does not check the ring of coefficients is a field.
- 17:26 CoCoA-5 Feature #1272 (Closed): Groebner Bases over ZZ
- Write a basic implementation for Groebner Bases over the integers
17 Apr 2019
- 10:17 CoCoA-5 Feature #1271 (In Progress): Allow Interruption of printing?
- Which printing commands should allow themselves to be interrupted?
* lists
* matrices
* ideals (?)
I think prob... - 08:26 CoCoA-5 Feature #1271: Allow Interruption of printing?
- I agree this would be very useful.
Strange for the error!
16 Apr 2019
- 17:49 CoCoA-5 Feature #1271: Allow Interruption of printing?
- I have a tried a first approach, but it did no work as I would have liked...
What I tried:
* in @Interpreter.C@ a... - 17:43 CoCoA-5 Feature #1271 (In Progress): Allow Interruption of printing?
- Inside emacs, if you print out a very long list then it takes ages before you can use emacs/CoCoA-5 again.
Conside...
09 Apr 2019
- 17:48 CoCoALib Feature #1267: Ideal equality
- I'm very uneasy in doing an automatic choice: the "trick" might work out as a slow overhead in a long loop with many ...
- 10:50 CoCoALib Support #1134: Organize better the documentation for CoCoALib
- I am postponing this issue. Even though I think it is important, it is likely to need a lot of time; anyway, the doc...
05 Apr 2019
- 20:56 CoCoA-5 Slug #1270: RationalSolve: use MinPolyQuot instead of elim
- Before we decide to replace @elim@ by @MinPolyQuot@ we should check that @MinPolyQuot@ is usually faster (I would cer...
- 20:19 CoCoA-5 Slug #1270 (Closed): RationalSolve: use MinPolyQuot instead of elim
- Currently @RationalSolve@ uses @elim@, but every use is equivalent to a call to @MinPolyQuot@ (in the subring generat...
- 16:31 CoCoALib Feature #385: Design new errors using inheritance
- This really the same as #743.
- 16:26 CoCoALib Feature #743: Better errors: give supplementary info about the error
- It would be nice to have a quiet moment to get this matter properly sorted out.
We really should try to deal with ... - 16:06 CoCoALib Design #581: C++14: MachineInt
- I have modified the subject and description to refer to C++14 instead of C++11.
There is a summary of the integral... - 15:48 CoCoALib Feature #1218: 32-bit or 64-bit preprocessor macro?
- We should check whether this still makes sense with C++14. I should also check on my little 32-bit machine...
- 15:46 CoCoALib Feature #1197: IsZeroDet: new fn
- The idea is simple: compute the det modulo various primes, and if any is non-zero then we know the non-modular det is...
- 12:30 CoCoALib Feature #1267: Ideal equality
- A similar trick could be used for ideal membership: if @x@ is not in @I+J@ then it is certainly not in @I@.
04 Apr 2019
- 21:31 CoCoALib Feature #658: Indets actually in a poly (or vector or matrix)
- It seems that there is already an impl in @SparsePolyOps-RingElem@.
There is no doc, no test. Also not exported t... - 15:16 CoCoALib Feature #1267 (In Progress): Ideal equality
- Long sent me one example which wanted to test if a large ideal (in a ring with 36 indets) contained 1. He actually d...
- 15:07 CoCoALib Feature #1269 (New): Ideal Ops: sort-cuts for trivial args?
- A colleague here in Passau was disappointed that @intersection(ideal(1), J)@ was taking a long time, even though the ...
- 15:00 CoCoALib Design #1255: Ideals with trivial GBasis
- Generators which are monomials are also a special case.
Then one could imagine a more complicated "mixed" situatio...
03 Apr 2019
- 17:14 CoCoA-5 Support #1268: Documentation for how to write a CoCoA package
- I can make some notes based on the questions I've been asked.
These notes could form a basis for a better guide; b... - 17:12 CoCoA-5 Support #1268 (Closed): Documentation for how to write a CoCoA package
- Some students here in Passau have been given the task of writing a CoCoA package, and have asked me for guidance. It...
- 17:11 CoCoA-5 Design #474 (In Progress): Eliminate package BinRepr
- What is the status of this issue?
The package still exists, and there is a *@BinRepr@* builtin function.
Can we d... - 17:08 CoCoA-5 Feature #1012 (Closed): Chebyshev polynomials
- This has already been done. Closing.
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