Activity
From 19 Jun 2015 to 18 Jul 2015
11 Jul 2015
- 22:31 Feature #142: Improve threadsafety
- I wonder whether the default configuration for CoCoALib should be the threadsafe one (which incurs a run-time efficie...
09 Jul 2015
- 13:14 Bug #746: Problem with GBasis in tower of alg extns
- Here is a transcript of what happened......
- 13:13 Bug #746 (New): Problem with GBasis in tower of alg extns
- I tried computing a GBasis in a ring with structure like @QQ(alpha)(beta)[x]@ where @alpha@ and @beta@ are algebraic....
- 08:39 Feature #728: Noncommutative algebra "of solvable type"
- No. In my understanding, John correctly described in #2 also Ore algebras (taking into account the note he later adde...
06 Jul 2015
- 07:14 Feature #728: Noncommutative algebra "of solvable type"
- If I understood well (I asked Viktor Levandovskyy ;-) the definition in #2 is actually of G-Algebras, and Ore-Algebra...
01 Jul 2015
- 18:40 Feature #520 (Closed): Compute inverse in quotient ring (i.e. division in algebraic extn)
- No problems arisen in the last month (perhaps not much real testing either?)
Anyway, closing.
- 18:38 Support #739 (Closed): Move code in examples into namespace CoCoA
- JAA checked, fixed a few oversights. Otherwise seems fine now. Closing.
- 18:12 Feature #721 (Closed): CheckForInterrupt: string arg to specify where it was called?
- After a brief testing period, the mechanism works (but the C5 interpreter needs to be improved so that a helpful mess...
- 18:04 Feature #689 (Closed): Fault tolerant rational reconstruction: make bad factor publicly accessible
30 Jun 2015
- 16:20 Feature #743 (In Progress): Better errors: give supplementary info about the error
- When CoCoALib produces an error which is then caught by CoCoA-5, the only information from the error which is shown t...
- 15:07 Bug #631 (Closed): Ambiguous: rank for matrix (in ex-matrix1.C)
- We use the name *@rk@* for the main function, but allow @Rank@ as a component of a compound name (to increase readabi...
- 11:58 Feature #721: CheckForInterrupt: string arg to specify where it was called?
- Doesn't seem to be enough to give a suitable error message to cocoa5.
(interrupt code is in @TmpGReductor.C@ and tes... - 10:55 Support #618: Instructions for compiling libnormaliz
- Normaliz is making a new release and we will refine the configuration in September (in Aarhus)
- 10:53 Support #739 (Feedback): Move code in examples into namespace CoCoA
- I believe it is all done: there was a problem using @program()@ instead of @CoCoA::program()@ with John compiler, it...
29 Jun 2015
- 17:23 Feature #658 (In Progress): Indets actually in a poly (or vector or matrix)
- Anna suggests the result could be a @DynamicBitset@; these appear to be like @vector<bool>@ but also support bitwise ...
- 16:44 Feature #91: Return type & name for "indets" of a PP
- JAA observes that we already have some vaguely similar functions:
* @radical(PP)@ same as @gcd(PP,product(all_indet... - 15:42 Slug #742 (In Progress): View PP exponent vector (and order vector?) as an array of long?
- On my 32-bit linux virtual machine I observe the following:
* with @int@ and @long@ all loops take about 3.0s (NB @i... - 15:36 Feature #689 (Feedback): Fault tolerant rational reconstruction: make bad factor publicly accessible
- Implemented. Documented. Not really tested :-(
Status --> feedback.
- 13:02 Slug #679 (Closed): power for PPs is too slow
- Apparently everything was already checked in... So I'm considering that ad hoc in-house testing has already happened...
28 Jun 2015
- 20:43 Slug #742: View PP exponent vector (and order vector?) as an array of long?
- I get some strange timings on my computer (MacOSX-10.5.8, old compiler)....
- 20:35 Slug #742: View PP exponent vector (and order vector?) as an array of long?
- Here is a simplistic test program I have written. It should let you test whether any speed gain is likely if you vie...
- 20:31 Slug #742: View PP exponent vector (and order vector?) as an array of long?
- JAA believes that we are already using this trick for order vectors (managed by @OrdvArith@).
Is it worth doing th... - 20:28 Slug #742 (In Progress): View PP exponent vector (and order vector?) as an array of long?
- Current implementations for exponent vectors (in PPMonoid elements) treat them as arrays of @SmallExponent_t@.
It ... - 19:34 Slug #679: power for PPs is too slow
- Apparently I have already done almost everything (but still have to check in).
I was surprised to see that we do not... - 16:38 Feature #82: C++11 compatibility questions
- It seems that a few things noted in issue #83 should actually be in this issue.
Apparently C++11 has a way of find...
26 Jun 2015
- 17:10 Feature #385: Design new errors using inheritance
- JAA has now implemented a simple superclass @CoCoA::exception@ from which all exceptions which CocoALib could throw m...
- 17:03 Feature #721 (Feedback): CheckForInterrupt: string arg to specify where it was called?
- Code has been updated, tested, documented (with simple example). Checked in.
Changing status to @feedback@.
- 16:58 Design #641 (Closed): Clean test-FreeModule1
- 16:15 Bug #705 (Closed): DetDirect calls myAddMul with 0 argument -- funny compilation problem??
- No problems encountered after 1 month in feedback. Closing.
- 16:14 Feature #714 (Closed): Interrupt mechanism
- Tested on my computer: pending interrupt and caught interrupt, they both work! Closing
- 14:56 Feature #714 (Feedback): Interrupt mechanism
- I've been using the current code for a little while (not really proper testing), and no problems have come up. So ch...
25 Jun 2015
- 18:40 Support #739: Move code in examples into namespace CoCoA
- JAA has done @ex-[A-D]@
JAA has done @ex-[E-M]@ - 15:32 Support #739 (Closed): Move code in examples into namespace CoCoA
- Following the change made to test files; move all code (except @main@) into @namespace CoCoA@.
This should keep th... - 18:12 Design #619 (Closed): Modulus (for CRTMill) ambiguous
- Added example and test (actually they are the same).
Checked in. Closing!
- 17:27 Feature #721: CheckForInterrupt: string arg to specify where it was called?
- I have checked in the current version (whose ctor requires a string). Waiting for Anna to check it.
At the moment... - 17:23 Feature #738: Extend homomorphism to polynomial ring
- Anna, John and Renzo agree that cases (1) and (2) in comment 1 are OK, and that the others are best handled by constr...
- 15:48 Feature #738: Extend homomorphism to polynomial ring
- Here is the original situation where the problem arose. I Have some polynomials with complex coeffs (in @QQ[i]@) and...
- 15:28 Feature #738 (In Progress): Extend homomorphism to polynomial ring
- I don't like automatic choices: look at these examples...
- 14:48 Feature #738: Extend homomorphism to polynomial ring
- What precisely are the semantics? When can the function be called?
Various cases to consider:
# given @phi: R --> R@... - 14:41 Feature #738 (In Progress): Extend homomorphism to polynomial ring
- It might be nice to have a simple/convenient/compact way of extending "coefficient homomorphisms" to polynomial rings...
- 17:15 Design #642 (Closed): Move code in test file into namespace CoCoA
- No problems encountered over the last month -- closing!
- 16:24 Feature #740: Addition of sparse (multivariate) polynomials
- I computed @(1+x+y+z)^99@ using CoCoA and Singular on my machine. CoCoA took about 8s, singular took about 5s :-(
- 16:23 Feature #740 (New): Addition of sparse (multivariate) polynomials
- Singular computes the length of the sum of two polynomials as part of the main result. We should do something simila...
- 15:34 Bug #736 (Resolved): QuotientRing: is it correct to prohibit quotient by ideal(1)?
- done: added IsOne(IDEAL)
- 14:30 Bug #736 (In Progress): QuotientRing: is it correct to prohibit quotient by ideal(1)?
- John Abbott wrote:
> * @if 1 isin I then ....@
> * @if IsOne(I) then ....@
the first already works. The second ... - 12:52 Bug #736: QuotientRing: is it correct to prohibit quotient by ideal(1)?
- Robbiano confirms that it is best to avoid the null ring (which has surprising properties such as @1 = 0@).
In thi... - 15:27 Bug #631: Ambiguous: rank for matrix (in ex-matrix1.C)
- JAA notes that now we're planning to move all test/example code into @namespace CoCoA@ the problem of ambiguity (in n...
- 15:16 Bug #666 (Closed): RatReconstructByLattice fails in some simple cases
- Modified C5 doc too.
21 Jun 2015
- 21:09 Bug #736: QuotientRing: is it correct to prohibit quotient by ideal(1)?
- The problem arose while doing some computations for Ulrich where it was known/expected that some ideals would be @ide...
- 21:06 Bug #736 (Closed): QuotientRing: is it correct to prohibit quotient by ideal(1)?
- The quotient ring @R/I@ where @I=ideal(1)@ gives the trivial ring.
Currently the quotienting operation gives a spe...
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