Activity
From 30 Jan 2014 to 28 Feb 2014
28 Feb 2014
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17:10 CoCoALib Feature #426: ConvertTo with optional arg to give more helpful error message
- added example and documentation (cvs-ed)
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- Jon implemented this and forgot to say it?
anyway it is very nice:
code was... -
- I think I made a fool of myself: we cannot have anonymous symbols in CoCoA because we do not have symbols. (we just ...
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- I'm already writing the code (taking some rust off my C++) and I'll wait for JAA's approval ;-)
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- In CoCoALib there are functions for making anonynous symbols (i.e. name of indeterminates).
Should we port them to C... -
27 Feb 2014
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09:44 CoCoA-5 Support #450 (In Progress): CoCoA-5.0.9 release (admin, overheads, etc)
- I wonder if the next version should be 5.1 instead of 5.0.4; the reason for the jump is the removal of the keywords *...
26 Feb 2014
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- Can we complete/close any of these issues?
#20, #32, #78, #94, #104, #197, #200, #204, #216, #239, #322
I'm sure the... -
- Things to do (no special order):
* (@Anna) check the roadmap, and see which tasks we can reasonably complete, and wh... -
- Just an issue to gather together all the things to do for the imminent 5.0.9 release.
JAA is hoping the release wi... -
- JAA should respond!
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- Has this effectively been resolved? It's been ages since I've seen the problem (but I hardly ever use the GUI...)
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- Here is a reason why I prefer a built-in fn for increasing max stack height over a command line option: a user discov...
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- I tried swapping two long lists (10000000 entries), and it was pretty quick; so I deduce that the values are not copi...
25 Feb 2014
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- C5 tells me "no matches" when I ask for *@? ><@*
Is this what we want? [no!]
How to fix it? [don't know] Maybe i... -
- Implemented in C++ (inside @PPMonoid.H@ and @PPMonoid.C@); it is faster.
Documented.
Also available in C5 now -- remo... -
14:31 CoCoA-5 Feature #328: Swap
- If I remember correctly, the swap above should not make any useless copy (that is, objects should be shared until the...
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- *Giovanni* any good hints on how I could implement an efficient @swap@ function in C++ (rather than doing 3 assignme...
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- I had suspected as much. Some guys wanted a stack size of about 250000, and asked for a command to increase stack si...
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- It's complicated; short answer: a frame needs to "point/reference" other frames for accessing non-local variables (_e...
24 Feb 2014
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- I have a first impl, but it SEGVs if I increase the stack size; don't know why.
The CoCoA-5 input is this: (initial ... -
- Anna said it would be best to keep the change as simple as possible, so it should be a function (since we're not sure...
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- No complaints from Oscar in 9 months, so presumably all is well. Closing.
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- The impl is quite short; move it to C++ (might even be faster?)
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- No complaints have come forth, so closing this.
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- Added first basic impl to @coclib.cpkg5@.
It should be possible to swap most types of value in C++ without actuall... -
- Old code has been deleted (not yet CVSed though). All still works.
*ANNA* will fix the manual; perhaps separate m... -
- We have chosen *@Func...EndFunc@* as the best compromise.
Implemented all steps (1)-(4).
Status is now *feedback*
22 Feb 2014
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- Here are the steps to make once we have decided what to do:
Step 1: modify interpreter (ought to be very easy, will ... -
- Being "trivial to implement" is surely a *big advantage*!
I wonder whether @fn...EndFn@ is too short; specifically d... -
- Some points to clarify on the website:
* what to download and do for a *completely new* installation (CoCoA+emacs)
* ... -
- On my portable it gave no problem: just returned the result @ideal()@.
With full debugging I get a failed assertion:... -
- We must remember to add CoCoALib tests for all these "trivial cases" -- they should be in CoCoALib rather than CoCoA-...
21 Feb 2014
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- Done stage 2. All C5 tests pass. Checked in.
NB old code for @Not@ operator has only been commented out for now... -
- Stage 1 done. About to check in!
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- There seems to be no doubt that the current @Not@ operator is problematic: even we, the C5 designers, find it "danger...
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- John Abbott wrote:
> I've just noticed a real howler in @hilop.cpkg5@
> [...]
> which is very different from the orig... -
- A moment's refection about the above howler has put me in panic mode; how come anything works in CoCoA-5???
Should... -
- I've just noticed a real howler in @hilop.cpkg5@...
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- John Abbott wrote:
> I have just grepped through the C5 packages and there are several places where the operator @No... -
- I have just grepped through the C5 packages and there are several places where the operator @Not@ is incorrectly appl...
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- I still vote for (with the great advantage of being trivial to implement ;-)...
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- I found this neat little example in a file I was playing with:...
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- I forgot to add that if we have a very compact syntax for simple anon fns (single expr) then it is less important to ...
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- Here's yet another idea (for simple anon fns), I suppose inspired by TeX.
An anon fn is any expression containing at... -
- John Abbott wrote:
> Over lunch I made a survey (sample size = 1): -Oscar-Anonymous had no idea ;-)
> My favourite... -
- Over lunch I made a survey (sample size = 1): Oscar had no idea what a "lambda function" might be (nor indeed what is...
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- I prefer a name intstead of the arrow.
So I looked at synonyms: (mind you: I'm joking)
X --> definitely not g... -
- I've spoken to Anna and she has accepted that having @lambda@ as a keyword in CoCoA-5 is inconvenient. The question ...
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- Most emacs variables dealing with the CoCoA5 emacs interface are called @cocoa5-*@ but a few do not begin with @cocoa...
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- No problems over the last month (incl. plenty of use).
So closing.
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- The change was to @cocoa5-beg-block-re@; I simply added initial @"\\<"@ and final @"\\>"@ -- it seems that they had b...
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- I think I have fixed it! :-)
Now the question is how to test it thoroughly?
[answer: a class full of unwitting guine... -
- John Abbott wrote:
> The mem fn @myColon@ is called by @colon@ (see source @ideal.C:280@) which makes a copy of @I@ ... -
- The mem fn @myColon@ is called by @colon@ (see source @ideal.C:280@) which makes a copy of @I@ and then "plays" with ...
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- I had fixed this kind of problemi in @SparsePolyRing.C@ for colon...
20 Feb 2014
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- I've made some quick tests in a buffer associated to @file.cocoa5@.
Adding a *prefix* (comprising letters and/or d... -
- Should there be a separate issue about putting some proper "extreme case" tests for all ideal operations in the stand...
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- @radical@ seems happy so long as there is at least one non-zero generator.
*However*, @radical(ideal(one(R)))@ gives... -
- Bad news: the problem occurs somewhere inside Max's code :-(
The problem is that @EmbedPolyList@ tries to create ... -
- Same problem with @radical(J)@.
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- The following input wrongly produces an error...
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- Here is an example taken from @NotBuiltin.cpkg5@
Current form:... -
- Other suggestions for the keyword: *@func...EndFunc@*, *@AnonFn...EndAnonFn@*,
*@AnonFunc...EndAnonFunc@*
My firs... -
- The problem was reported by Elisa Businelli (and can be reproduced on her computer).
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- In side emacs using @send-file@ or @send-region@ issues a CoCoA command using @Source@ and @SourceRegion@ commands se...
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- The following input produces a @std::bad_alloc@ exception on Microsoft Windows 7 Ultimate (Service Pack 1) 2009
<pre...
19 Feb 2014
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- I think the problem may be in the definition of @cocoa5-beg-block-re@.
I presume the @-re@ suffix means "regular exp... -
- The emacs UI sometimes gets indentation wrong inside a @file.cocoa5@.
The specific case I observed was when the pr... -
- The @Not@ operator behaves differently from C4.
In C4 you could write @If Not 1 IsIn I Then ...@
In C5 this is ... -
- This has been in feedback for 9 months without any problems, so closing.
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- I've just resuscitated the eigenvector code.
Having @lambda@ as a keyword is a nuisance, _e.g._ it cannot be used ... -
- Clean up impl of @eigenvectors@ and translate it into C++.
Ideally it should perhaps use algebraic extensions? -
- Tony should be here in a couple of weeks; maybe we could ask him to help improve the design of the website (by giving...
18 Feb 2014
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- Thanks Christof for trying the hacked code. I'm both surprised and relieved that there was no significant improvemen...
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16:11 CoCoALib Bug #413: OrdvArith: use of a single buffer is NOT THREADSAFE
- I tried the change. It is really hard to tell if there is a difference. It seems to be slightly faster on some exampl...
14 Feb 2014
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- > I did write the code for emacs so that the sourced lines are printed (commented out), but, of course, this is not s...
13 Feb 2014
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- Christof could you make some further tests after modifying slightly the OpenMP version of the @OrdvArith@ code I sent...
12 Feb 2014
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16:30 CoCoALib Feature #342: Remove denominators: QQ[x] -> ZZ[x] (and PushBack(coeff, PP))
- My non-authorative solution is...
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- John Abbott wrote:
> I can see what the students of the upcoming Computer Algebra course say about "send region" not ... -
- I can see what the students of the upcoming Computer Algebra course say about "send region" not copying the region se...
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- The emacs key sequence @C-c C-e@ should automatically insert the correct @End...@ keyword to close a syntactical cons...
11 Feb 2014
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- Make the code prefer "binary rationals" as much as possible; exploit this fact when evaluating the polynomial. In an...
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- Port the @RealRoots@ code to C++ so that it is accessible to CoCoALib users!
I hope that a well-written port might...
10 Feb 2014
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- I wonder if a friendly industrial designer would be able to help. :-)
09 Feb 2014
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- I am sorry for having raised a non-issue.
Regarding NumTerms: is it a data field of the polynomial or is it compu... -
- Winfried Bruns wrote:
> I think it is a question that needs careful testing before any changes should be done. As ob... -
- I think it is a question that needs careful testing before any changes should be done. As observed by John and mentio...
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- In @SparsePolyRing.C -- myMul@ there is this code...
08 Feb 2014
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- [20140208] Tony reported that he found the website quite difficult to navigate, and felt it did not explain clearly p...
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- [from an email sent to Bruns] I do recall that there are complications for inserting the terms in the correct order; ...
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- Bruns asks whether @f*g@ and @g*f@ take the same time or whether one way round is better than the other. He mentions...
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- Computation speed in C5 often degrades over time; I think this may be due to loss of data locality in the RAM. In an...
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- This function seems to be optimal.
What is the authorative function for the converse transformation ZZ[X] --> QQ[X] ?
07 Feb 2014
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- It should be possible to make @EvalUPoly@ faster for binary rationals (_i.e._ whose denom is a power of 2)
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- The interpreter should check whether LHS is protected *before* trying to evaluate RHS (because evaluation RHS might b...
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- I'd like to resolve & close this issue in the near future!
06 Feb 2014
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- I created a 3Mbyte file with short lines (100 copies of the code in @radical.cpkg@). There was some slow down, but q...
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- The problems of serious slow down occur only when the cursor is towards the end of the file -- response is normal whe...
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- Emacs has become very slow as I edit a large (3Mbyte) @file.cocoa5@.
The file contains several quite long lines (u... -
- My idea to use @SourceRegion@ has a (minor?) technical problem: it implies that the buffer be saved to the associated...
05 Feb 2014
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- Sending a long line to CoCoA-5 inside Emacs does not work: CoCoA gets stuck and simply prints out lots of ^G. I beli...
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- Could you also define some other key sequences? For instance,
C-c RET
C-c C-RET
The advantage of defining both ...
04 Feb 2014
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- On our compute server with 20 threads the performance was about 5% better with the OpenMP adaptation for some medium ...
03 Feb 2014
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- I notice in @SparsePolyRing.C:551@ that there is a check via @IsPrintAtom@. The documentation says _true iff arg doe...
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- In note 6 I unwittingly overlooked some (important?) points: for instance I did not consider compound coefficients in...
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- CVS
time nmzIntegrate -E CondEffPlurSymm-100
nmzIntegrate -E CondEffPlurSymm-100 218,09s user 0,69s system 385% cpu... -
- OK, I'll try to rewrite it -- maybe even this afternoon while invigilating!
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- I did some tests and the timings were exactly the same. So I checked again. I only have a version which still include...
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- Yes, I still have it and will give it a try.
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- Anna rightly asked how should TwinFloats be handled.
Right now, I'm undecided. I'm quite sure that any polynomial... -
- If we follow the suggestion in note 6 of issue #222 then we need to define @IsPrintedWithMinus@ only for numerical ri...
01 Feb 2014
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- I would prefer a symmetric appearance, either no space around the + sign or a blank on bothsides.
But it is a mat...
31 Jan 2014
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- This issue has been sitting idle for a year. We should decide, and then implement!
*Addendum:* JAA thinks that a le... -
- We should clarify what the semantics of @IsPrintedWithMinus@ are.
I suggest that if @IsPrintedWithMinus(x)@ gives ... -
- John and Anna talked about Christof's proposal, and both believe it is a good idea! :-)
John will look at existing... -
- @Christof, I have unclosed the issue because Anna proposed to redo your long computation using impl *(B)*, just to co...
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- Wow I wrote something that actually works?? :-)
Bonus extra 10% for this issue :-)
Now I'll have to write a test,... -
- John implemented it. Works for me.
30 Jan 2014
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- Several test were successful. I consider it as done.
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- It looks much cleaner now.
I'm not sure how the .cvsignore works but maybe you want to add the Makefile_dependencies... -
- Anna pointed out that is already a fn *@ClearDenom@* which does almost what is wanted: it multiplies the polynomial b...
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- Official part of CoCoALib now.
Even with example in
example/ex-PolyInput2.C
(still missing: documentation)
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- Example program is done and working fully:
reads any kind expression with + - * / ^ ()
They key was John Abbott's... -
- We would like to do ...
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- To summarize, there are now the following constructors:...
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- For me it now works fine. With and without libnormaliz.
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- without --with-libnormaliz it still tries to check and get
nm: '': No such file -
- Just an idea... it might be nice if the matrix created contained only non-negative entries (_e.g._ it is easy to have...
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