Activity
From 07 Jan 2021 to 05 Feb 2021
05 Feb 2021
- 15:41 CoCoA-5 Bug #1216: RationalSolve: gives wrong answer
- I am wondering about changing the return value of @RationalSolve@ into a record, _e.g._
*currently* we get...
04 Feb 2021
- 21:05 CoCoA-5 Bug #1216: RationalSolve: gives wrong answer
- I have modified my copy of the code. It now behaves more "predictably".
*@RationalSolve@* now searches only for _... - 14:49 CoCoALib Design #1572 (In Progress): Use noexcept
- I am not sure whether a function which has a local static variable can be @noexcept@.
I suppose, so long as the loca...
03 Feb 2021
- 18:20 CoCoALib Bug #1575 (New): DynamicBitset missing arg checks
- I have just looked at the code for @DynamicBitset@ (with the intention of putting in @noexcept@),
and noticed that s... - 18:18 CoCoALib Feature #1419: DynamicBitset::IamAll1s
- I think it might be tricky because inside the loop you need to check if you are at the last position, whereas the new...
- 17:48 CoCoA-5 Bug #1574: ApproxSolveTF
- I have set the target version as 5.3.6, but maybe it could be postponed?
It is a bit strange that the solution [0,... - 17:46 CoCoA-5 Bug #1574 (New): ApproxSolveTF
- @ApproxSolveTF@ is not documented. Maybe that is a good thing......
- 17:26 CoCoA-5 Bug #1216: RationalSolve: gives wrong answer
- I now think it might be better to avoid the "clever" function @RationalSolve@ which tries to guess whether it should ...
02 Feb 2021
- 17:04 CoCoALib Design #934 (In Progress): MachineInt: change semantics?
- There is a second impl of @MachineInt@ in the current sources. The impl was not complete (but it is now).
However...
31 Jan 2021
- 10:43 CoCoA-5 Bug #1216: RationalSolve: gives wrong answer
- Bernhard Andraschko reportes the following:...
30 Jan 2021
- 20:21 CoCoALib Bug #1570 (Feedback): FloatStr sometimes produces NUL chars
- 18:47 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- I think everything is nearly sorted out now: the example in comment 8 now finds no problems (even over a much wider r...
- 20:17 CoCoA-5 Bug #1573: ApproxSolve: very imprecise
- The example was deliberately chosen to be hard/troublesome. Making the parameters @D@ and/or @N@ larger almost surel...
- 19:48 CoCoA-5 Bug #1573 (Closed): ApproxSolve: very imprecise
- I have found an example where @ApproxSolve@ gives very imprecise solutions:...
29 Jan 2021
- 20:19 CoCoALib Design #1572: Use noexcept
- Maybe not many functions are applicable _e.g._
* the fn must not call a fn which is not @noexcept@ (with args whic... - 20:18 CoCoALib Design #1572 (Resolved): Use noexcept
- Scott Meyers recommends using *@noexcept@* where it fits naturally.
Check to see where we can use it.
- 20:16 CoCoALib Design #1511: Use C++14 constexpr
- So far I have done the following files: (update list as files are done)
* *@bool3.H@*
* *@config.H@*
* *@DivMask@*... - 20:12 CoCoALib Feature #152 (Closed): Replace bool3 by tribool
- I think the new version is OK now. I have also put in *@noexcept@* where appropriate.
One inconsistency: we can a... - 15:43 CoCoA-5 Feature #1174 (Closed): package of a function --> of an identifier!
- 15:42 CoCoALib Bug #1571: ker_H needs care
- some verbosity has already been included in the file @HomomorphismOps.C@
- 15:40 CoCoALib Bug #1571 (New): ker_H needs care
- The function @ker_H@ is not properly developed/documented.
In particular, there are problems for... - 15:27 CoCoALib Bug #1484 (Feedback): ker bug (quotientinghom for R/ideal())
- 15:26 CoCoALib Bug #1484: ker bug (quotientinghom for R/ideal())
- Anna Maria Bigatti wrote:
> For proper testing I added some verbosity, but I cannot see it.
> [...]
> what am I mi... - 09:45 CoCoALib Bug #1484: ker bug (quotientinghom for R/ideal())
- For proper testing I added some verbosity, but I cannot see it....
- 12:26 CoCoA-5 Design #1151 (Closed): ConcatList or ConcatLists
- 12:05 CoCoA-5 Design #1520 (Closed): Replace BOOST_FOREACH by new C++14 range for syntax
- 12:03 CoCoA-5 Feature #1516 (Closed): substring function
- 12:00 CoCoALib Design #854: Function MakeTermOrd should be renamed MakeTermOrdMat?
- work for me
- 11:59 CoCoA-5 Design #1334: sylvester or SylvesterMat?
- cocoa5 manual for @jacobian@ updated now (2021-01)
- 11:52 CoCoALib Feature #958: New function: multiplicity and dim
- AnnaM think and close this!
- 11:31 CoCoALib Feature #1488: BuiltIn Interreduce-Function
- John Abbott wrote:
> I have commented out @interreduce@.
> I have renamed the files to @SparsePolyOps-interreduced@... - 11:26 CoCoALib Design #1563 (Closed): BigRat: ctor from machine int
- 10:00 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- And indeed the defn of @log@ for @BigRat@ is simply...
- 09:56 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- This is not good.
I have increased the factor in the definition of @delta@ to 64: there are still failing cases:
... - 09:31 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- Here is a simpler failing case:...
28 Jan 2021
- 21:37 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- I have found what is most likely the cause (after tracing through with the debugger).
The problem was in *@FloorLo... - 20:35 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- Aha! It seems that @FloorLog10@ sometimes give wrong answers... groan.
With luck that is the root cause.
- 19:48 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- @FloatStr@ simply calls @MantissaAndExponent10@ to do the main conversion.
Indeed *@MantissaAndExponent10@ behaves w... - 19:25 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- Operating on @10*q@ produces the same mantissa (with NUL) but without exponent.
Operating on @100*q@ produces a cor... - 19:17 CoCoALib Bug #1570 (In Progress): FloatStr sometimes produces NUL chars
- The exponent is wrong by 1: it should be -10.
- 19:13 CoCoALib Bug #1570: FloatStr sometimes produces NUL chars
- The bug is more embarrassing than dangerous...
Don't yet have a simpler failing example.
Of course, it came up ... - 19:12 CoCoALib Bug #1570 (Closed): FloatStr sometimes produces NUL chars
- Here is a concrete example:...
26 Jan 2021
- 13:47 CoCoALib Design #1558: CpuTimeLimit: more frequent clock checks
- While looking for examples for my course computer algebra I wanted to use @GBasisTimeout@. Sometimes the curr impl d...
22 Jan 2021
- 20:44 CoCoALib Feature #152 (Resolved): Replace bool3 by tribool
- I have updated the code. Maybe the revised impl is cleaner.
Anyway, it all seems to work. The code is so simple, t... - 17:15 CoCoALib Feature #152 (In Progress): Replace bool3 by tribool
- While the impl in BOOST is surely good, I do prefer to keep CoCoALib independent of BOOST (of course, the interpreter...
- 16:22 CoCoALib Slug #1569: IsInRadical too slow (test-RadicalMembership)
- Not surprisingly the computation mod p is very quick.
BTW the answer to the computation as given is (almost certai... - 15:09 CoCoALib Slug #1569 (Closed): IsInRadical too slow (test-RadicalMembership)
- From a demo I showed my students...
I computed a "nasty" 0-dim radical, then wanted to show @MinPowerInIdeal@, but i... - 15:05 CoCoALib Bug #1565 (Feedback): IsInRadical: gives "weird" error
- I have modified the code so that it avoid recomputing the "radical helpers".
All tests pass. Will clean and then ch... - 10:49 CoCoA-5 Design #1151 (Feedback): ConcatList or ConcatLists
- John Abbott wrote:
> Personally I find the name @ConcatLists@ more "natural" because it concatenates many lists.
... - 10:34 CoCoALib Bug #1484: ker bug (quotientinghom for R/ideal())
- John Abbott wrote:
> There are two more suspect creations of ideals: line 325 and 347.
> I have changed these too, ... - 09:58 CoCoA-5 Design #1568 (In Progress): RMap and image: obsolescent?
- I thought @Rmap@ was completely obsolete.
It is defined in @coclib.cpkg5@ and exported.
It is also defined in @ra... - 09:52 CoCoA-5 Feature #531: Package protected variables should know which package protected them
- There is a sort of redundancy in package @$anna@ putting a protection reason on the variable @$anna.var@.
It would... - 08:44 CoCoA-5 Feature #531: Package protected variables should know which package protected them
- All done: works for @:=@, @unprotect@ and @define@.
The field @protectionReason@ is actually set, but for the comp... - 08:31 CoCoA-5 Feature #1174 (Feedback): package of a function --> of an identifier!
- I'm now convinced that the only exception to the evaluation of the argument of a function should be @IsDefined@. The...
- 08:23 CoCoA-5 Feature #346 (Feedback): Describe should indicate package name
21 Jan 2021
- 15:16 CoCoA-5 Bug #1567 (Resolved): Radical in non-zero char
- I have found the problem and fixed it. Also done some cleaning inside @radical.cpkg5@
When are we moving this to C+... - 15:15 CoCoA-5 Bug #1567 (Closed): Radical in non-zero char
- ...
- 13:46 CoCoA-5 Support #1566 (Closed): What does rad do?
- It seems that CoCoA-5 has a function *@rad@*
What does it do? It is not documented.
19 Jan 2021
- 14:03 CoCoALib Bug #1565 (In Progress): IsInRadical: gives "weird" error
- I have modified @RadicalHelpers@ in @SparsePolyOps-RadicalMembership.C@
Seems Ok now. Still testing. - 13:27 CoCoALib Bug #1565: IsInRadical: gives "weird" error
- Also get:...
- 13:25 CoCoALib Bug #1565 (Closed): IsInRadical: gives "weird" error
- Specific example:...
- 12:39 CoCoA-5 Feature #1469: Get indexed indets from a polyring
- Hi,
I would highly appreciate such a function, however I think it would be even better if one must not first initial... - 09:20 CoCoA-5 Feature #1564 (New): Geometrical theorem proving package
- What is the stats of the _geometrical theorem proving_ package?
It seems the package is there, but the on-line man...
15 Jan 2021
- 21:15 CoCoALib Feature #206: Matrix equation solving: LinKer
- The source of *@LinKerBasis@* looks a bit dodgy.
Given a matrix it does what is expected; but it also works for a _l... - 21:07 CoCoALib Feature #206: Matrix equation solving: LinKer
- This was originally in issue #122; moving it to here.
What is the difference between @LinKer@ and @LinKerBasis@?
... - 21:09 CoCoALib Feature #122 (Closed): Porting "LinKer"
- This seems to be a *duplicate* of #206; since there is more info under that index, I'm closing this one.
- 09:18 CoCoALib Feature #122: Porting "LinKer"
- What is the difference between *@LinKer@* and *@LinKerBasis@*?
Is @LinKerBasis@ essentially the same as @GetCols(Lin... - 21:05 CoCoA-5 Design #1546 (Feedback): Improve 'describe' or 'print' for a function
- This is now working fine (after Anna changed the impl of print in the interpreter). Moving to *feedback*.
- 20:56 CoCoA-5 Feature #346: Describe should indicate package name
- Since @print@ and @sprint@ now produce the body of a CoCoA-5 function, it superfluous for @describe@ to do the same.
... - 20:52 CoCoA-5 Feature #346 (Resolved): Describe should indicate package name
- *IMPORTANT*
* the @describe@ command describes a _value_ and not a _variable_;
* a fn defn *does not contain any in... - 09:13 CoCoA-5 Feature #346: Describe should indicate package name
- Since Anna seems to have solved issue #1174, is it now possible to make progress here?
Since normal printing now p... - 20:42 CoCoA-5 Feature #531: Package protected variables should know which package protected them
- In the source code indicated by Anna, there is a loop which sets @protectionReason@ (or some similar name).
These re... - 12:23 CoCoA-5 Feature #531: Package protected variables should know which package protected them
- Anna Maria Bigatti wrote:
> There is something called @protectionReason@ but seems unset (very strange: the code for... - 10:39 CoCoA-5 Feature #531: Package protected variables should know which package protected them
- modified also implementation of @unprotect@...
- 10:30 CoCoA-5 Feature #531 (Feedback): Package protected variables should know which package protected them
- Implemented: updated code of @CheckProtection@ (extra arg runtimeEnv) in Interpreter.C
(done it, before I forgot the... - 08:18 CoCoA-5 Feature #531: Package protected variables should know which package protected them
- I might be able to fix this, see #1174
- 18:01 CoCoALib Support #1265 (In Progress): Unregistered TXT files in doc
- Progress chart:
* *@SmallPrime.txt@* removed because very out of date
* _fill in as progress is made_ - 17:55 CoCoALib Design #1563 (Feedback): BigRat: ctor from machine int
- I have now changed all calls @BigRat(...,1)@ into just @BigRat(...)@ in examples, tests, and source code.
Checking i... - 17:08 CoCoALib Design #1563 (Resolved): BigRat: ctor from machine int
- I have added 2 new ctors (one from @MachineInt@ and one from @BigInt@).
They are @explicit@ (as is the ctor for @Big... - 17:05 CoCoALib Design #1563: BigRat: ctor from machine int
- I have just discussed with Anna. Bruns's argument is persuasive: our original decision was to protect the user again...
- 16:18 CoCoALib Design #1563 (In Progress): BigRat: ctor from machine int
- There were 2 reasons for prohibiting ctor from a machine int: ambiguity of BigInt(0) since 0 could also be interprete...
- 15:39 CoCoALib Design #1563 (Closed): BigRat: ctor from machine int
- Bruns asks the following "why?"...
- 17:13 CoCoALib Design #1180: BigRat(0) unexpectedly compiles! (calls ctor with mpq_t arg)
- *IMPORTANT UPDATE*(2021-01-15) this decision has now been reversed in issue #1563
- 10:02 CoCoALib Feature #1559: Default ctor for rings
- The class *@ring@* does have a default ctor (which assigns @RingZZ()@ as initial value).
In contrast, @SparsePolyRin... - 09:07 CoCoA-5 Feature #1174: package of a function --> of an identifier!
- Well done! I suggest we accept the version taking a string for the time being (unless you can easily make a fn like ...
- 08:29 CoCoA-5 Feature #1174: package of a function --> of an identifier!
- Example:...
- 08:11 CoCoA-5 Feature #1174: package of a function --> of an identifier!
- should the name be @PackageOf@?
I have investigated: belonging to a package (variable) is a property of the variab... - 06:48 CoCoA-5 Bug #1531: CRASH: arithmetic with HilbertSeries (tagged object)
- It (correctly) gives error both on right and left, no crash.
14 Jan 2021
- 14:31 CoCoALib Feature #206: Matrix equation solving: LinKer
- The fn *@LinKerZZ@* is available in my copy of CoCoA-5, but there is no doc.
The doc for CoCoALib seems explicit.
... - 14:27 CoCoALib Feature #122: Porting "LinKer"
- Has this already been done? There are two fns in CoCoA-5: @LinKer@ and @LinKerBasis@.
What about @LinKerZZ@?
12 Jan 2021
- 14:32 CoCoALib Design #1558: CpuTimeLimit: more frequent clock checks
- I have modified the impl so that it triggers only when the CPU time limit has been exceeded, but it does try to call ...
11 Jan 2021
- 11:09 CoCoALib Design #1562 (New): matrix.H and MatrixView.H
- To be able to use the type @ConstMatrixView@ I need to include @matrix.H@ rather than @MatrixView.H@.
Is this reas... - 10:19 CoCoALib Support #1561 (New): Doc for module term orderings
- The documentation for module term orderings is unhelpful (to put it politely).
I wanted to find out whether a @Fre... - 10:02 CoCoA-5 Bug #1560: elim for modules
- Not sure how hard this might be. Does it suffice to create a poly ring with elim order, and then compute the GB for ...
- 09:59 CoCoA-5 Bug #1560 (New): elim for modules
- Bernhard Andraschko reported the following NYI:...
- 08:55 CoCoALib Design #1558: CpuTimeLimit: more frequent clock checks
- John Abbott wrote:
> Now I am wondering whether it may not make more sense to base @CpuTimeLimit@ on the "steady clo...
09 Jan 2021
- 18:20 CoCoALib Feature #1559 (In Progress): Default ctor for rings
- Winfried Bruns sent the following by email:
"I wanted to define a class that contains two sparesepoly rings as mem...
08 Jan 2021
- 18:46 CoCoALib Bug #1376 (Resolved): GBasisTimeout: not working as expected
- Using just the one example "french students" example, the current (2021-01-08) version of @CpuTimeLimit@ works accept...
- 09:48 CoCoALib Bug #1376: GBasisTimeout: not working as expected
- Now I think it should be possible to make @CpuTimeLimit@ check the time more frequently without much overhead (by che...
- 18:11 CoCoALib Design #1558 (Resolved): CpuTimeLimit: more frequent clock checks
- I now have a version of @CpuTimeLimit@, which actually uses only "steady clock" rather than @CpuTime@.
It seems to... - 16:11 CoCoALib Design #1558: CpuTimeLimit: more frequent clock checks
- Now I am wondering whether it may not make more sense to base @CpuTimeLimit@ on the "steady clock" (but then the nam...
- 10:07 CoCoALib Design #1558 (In Progress): CpuTimeLimit: more frequent clock checks
- Here is the code I used as a speed check:...
- 09:38 CoCoALib Design #1558 (Closed): CpuTimeLimit: more frequent clock checks
- The impl of @CpuTimeLimit@ is a bit complicated because the @CpuTime@ function is more expensive than I had expected....
- 15:23 CoCoA-5 Feature #1516 (Resolved): substring function
- I have written a (short) manual entry.
Should there be some tests? :-/
- 15:16 CoCoA-5 Feature #1516: substring function
- I have written a first version (in @BuiltinFunctions.C@).
* name: *@substring@*; I prefer not to use @sbstr@ as th... - 13:06 CoCoA-5 Feature #1516 (In Progress): substring function
- Start pos and length seem reasonable to me.
Should we also allow the version which goes to end of string? KISS: m... - 13:03 CoCoALib Design #1391 (Closed): RingElems: syntax with [ and ] ?
- I have added some tests (to @test-RingElem5.C@).
All seems OK. Closing. - 11:58 CoCoALib Bug #1484: ker bug (quotientinghom for R/ideal())
- Anna! check ring for empty lists!
- 11:56 CoCoA-5 Bug #1539: Website: installation instructions for Microsoft
- add the instruction written by Henry O'Keeffe
- 11:53 CoCoA-5 Bug #1512 (Closed): Package with unexpected EOF
- 11:51 CoCoA-5 Design #1495 (Closed): Package exporting nothing?
- Tested. OK.
- 11:35 CoCoA-5 Feature #1509 (Closed): RingElems with empty input
- 11:31 CoCoA-5 Design #1546: Improve 'describe' or 'print' for a function
- And also fix the manual.
- 11:30 CoCoA-5 Design #1550 (Closed): version number for CoCoA5 snapshot release?
- For snapshot releases: (Anna) remember to change the links in the webpage.
- 11:28 CoCoA-5 Feature #1543 (Closed): Default path for packages
- 11:24 CoCoA-5 Design #1530 (Closed): VersionInfo -- better field names?
- 11:23 CoCoA-5 Support #1498 (Closed): Export many names or just one?
- 11:20 CoCoA-5 Slug #1556: DivAlg slower than NR
- I checked: not as easy as I thought.
@NR@ is defined in @SparsePolyOps-RingElem.C@ and make use of ReductionCog. Th... - 11:19 CoCoA-5 Bug #1527 (Closed): Inadequate error message on incorrect list access
07 Jan 2021
- 20:54 CoCoALib Bug #1376: GBasisTimeout: not working as expected
- The relevant source is probably in *@SparsePolyOps-reduce.C@* around line 133.
The timer object is constructed in... - 20:42 CoCoALib Bug #1376: GBasisTimeout: not working as expected
- Setting the timeout to 20s worked very well. Setting it to 25s triggered an interruption after 95s.
Setting it to 9... - 20:19 CoCoALib Bug #1376: GBasisTimeout: not working as expected
- Why are there no test cases for this issue? Without them how can i know if it has been satisfactorily solved?
Usi... - 20:26 CoCoALib Support #1555 (In Progress): Software licence
- Here is a suggestion:
* find out how many different copyright messages we need (headers, source, tests, examples, do... - 20:04 CoCoALib Design #855: Copyright and authorship?
- I have added Bigatti to all files which had just Abbott as copyright holder.
Anna should now add Abbott to all files... - 20:02 CoCoALib Slug #1557 (Resolved): Reading list of rationals is too slow
- There was a bug in my first version of the faster code: @in.get(ch)@ does not put EOF into @ch@ when EOF is reached -...
Also available in: Atom