Activity
From 02 Nov 2020 to 01 Dec 2020
01 Dec 2020
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14:03 CoCoA-5 Feature #1541: foreach with ref to list entry?
- If we choose to extend CoCoA-5, there are 2 obvious approaches:
* modify @foreach@ so that it uses references --- ob... -
- Julian Danner asks whether it would be possible to have a version of @foreach@ which operates on a reference to the l...
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- I am tempted to remove the example of using @indent@ with 2 args: it occupies a lot of vertical space, but conveys li...
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- Maybe this should be a new issue? I was surprised at what @indent@ did when given a module:...
26 Nov 2020
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16:33 CoCoA-5 Support #322: Installation instructions (on website)
- I must check what happens for old MacOS
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- My copy works ok, but I must devise tests.
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- John Abbott wrote:
> A possible way to address the problem is to discourage users from typing *@/-@* by making it is... -
- Anna will impl in CoCoAlib, and then make accessible to CoCoA-5.
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- One difference between @QQ[x,y,z],xel@ and @QQ[z,y,x],lex@ is that the order in which the idents are printed is diffe...
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- Very good reasoning.
Indeed some researchers have opposite standards, calling lex (and degrevlex) what we call xel (... -
- I like the idea. We need another mane for the funzion with indices.
23 Nov 2020
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- I have checked in my changes. Let's hope everything works fine!
20 Nov 2020
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- We still need to see where the new the @for@ syntax can be used in cocoalib -- that is issue #1346.
Maybe I should... -
- I think I have done most of the code in @src/CoCoA-5@.
It compiles and the CoCoA-5 tests all pass.
I made the chang... -
- I would like to maintain reasonable compatibility between the way CoCoA-5 parses expressions and the way @RingElem@ o...
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- Apparently the ability to suppress prompts could be useful for the ApCoCoA interface.
For that application, it wou... -
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- fixed
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- What was nice was that Bernhard wrote "shouldn't cocoa-5.2 be cocoa-5.2?"
So even bug reporters can make typos ;-)
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- Done.
I added "Boost" only in BuiltinFunctions.C.
I have also the code for adding it in ExternalLibs.C (commented o...
17 Nov 2020
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- The input functions are quite messy: not really a coherent design philosophy.
It seems that *@ReadExpr@* gives err... -
- Last week a student came with some problems with making CoCoA work on her MacBook; most of these are dealt with elsew...
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- A possible way to address the problem is to discourage users from typing *@/-@* by making it issue a warning.
As a... -
- This is probably not solvable :-(
I changed the emacs syntax declaration for "minus" into just a plain "." (punctu... -
- Here is some doc about emacs;...
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- Around line 335 in @cocoa5.el@ there is this...
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- As far as I can tell the following "digraphs" are recognized as starting a comment:
slash-star, slash-slash, slash-m... -
- I have tried a few tests. slash-minus seems to be recognised as a comment start; I have tried slash-char where char w...
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- If we do look at handling exponents, it might be nice to improve the error mesg when a negative exponent is given wit...
16 Nov 2020
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- I think CoCoA should give a warning or even an error. Currently, it gives neither!
On my computer I got *@x^8@*
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- What do you think CoCoA does with the following input?...
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- The installation instructions for Microsoft refer to the directory *@C:\cocoa-5.2\emacs@* instead of *@C:\cocoa-5.3\e...
13 Nov 2020
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- The C++ version does not work: @WhatsNext@ causes too much trouble :-(
Groan... -
- Remove the CoCoA-5 and make it call the cocoalib version.
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- *Anna will do the following*
(1) move the info about BOOST into the subrecord @ExternalLibs@ (_i.e._ added to the li... -
- and add Boost into the ExternalLibs record
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- Anna could you do the following on your old MacBook:
(1) download the official distrib
(2) follow the instructions ... -
- I have had trouble installing CoCoA-5 from our website on my old mac.
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- My personal opinion is that I do not like *@1/-2@* and *@2*-3@*; they both look like typos to me. Perhaps the user m...
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- Similar problem for *@RingElem(QQ, "2*-3");@*
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- What should the following do...
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- ...
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- The matter was raised by Bernhard Andraschko. His argument is below:...
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- At the moment CoCoA-5 does not recognise the keyword @xel@ for specifying a term order when defining a new ring.
I...
12 Nov 2020
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- Here is a little background/motivation.
I demoed to the students how one can impl in CoCoA-5 the algm to compute a m...
11 Nov 2020
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15:11 CoCoA-5 Feature #1535: New functions: argmin, argmax
- I clearly prefer @argmin@, since its easier to type and lower-case is also more common in mathematics, but (as for ma...
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- What should the names be?
In most contexts they are written @argmin@ (or maybe @arg min@ with a space).
Should be u... -
- Should this actually be in CoCoALib?
Might it be handy to have a version which returns the index (or indices) of t... -
- Here is a first prototype in CoCoA-5...
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- Proposal:
create new functions @argmin@ and @argmax@ which operate on lists.
The idea is that they return an/all ...
10 Nov 2020
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- Review the instructions for installing CoCoA-5.3 on MacOS.
Unfortunately it seems that an administrator account an... -
- It might be possible to extend the impl give above to handle quotients of poly rings, and perhaps also "towers" of po...
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- I suggest for the "Num bits" fields to the names *@NumBits_MachineInt@*, *@NumBits_MachineLong@* and *@NumBits_Small...
09 Nov 2020
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- It is not clear to me how to implement @+=@ etc. better than the naive way, and maintain exception safety.
It migh... -
- Revised example (now that we're mostly 64 bit)...
06 Nov 2020
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- Florian mentions that Singular has something called *@imap@*...
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- Here is a prototype in CoCoA-5... we would also need a version for cocoalib!!...
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- Here is the example Florian wanted:...
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- CoCoALib should offer some convenient pseudo-ctors for @RingHom@.
One example would be from @QQ[x,y,z]@ into @QQ(x... -
- The obvious convenient solution would be to allow @RingElem@ to accept the @RECORD@ produced by @IndetSymbols@.
Migh... -
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- The funcrions @RingElem@ and @IndetSymbols@ are sort-of-inverses; but we could perhaps do better?...
05 Nov 2020
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- At least + is commutative: @HilbertSeries(...)+1@ also causes a crash!
I have modified @Interpreter.C@, and checked ... -
- I have just tried using my last idea @rightOp->getType()->isProperSybstypeOf(..)@.
It compiled, and now produces a v... -
- The troublesome call is on line 1536 of @Interpreter.C@.
The problem is that @rightType@ has @dispatchIndex@ equal t... -
- The following input causes an assertion failure, followed by abort:...
04 Nov 2020
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- One mild concern is that the reading fns in C++ try to accept the maximum length initial string which gives "valid" i...
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- The code for reading a @BigRat@ can read it either as a fraction @N/D@ or as a decimal @Int.frac@.
For the "decima... -
- Ooops! I have had a look a what happens when a @BigInt@ is read... and I found a bug :-(
For @BigInt@ no space is... -
- Regarding point *(1)*... what should input of a @BigRat@ do with the following input streams?
* *@1/2@* -->JAA: ... -
- One possibility would be to require that an integer literal start with a decimal digit: _e.g._ there is no problem in...
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- I presume the timings in comment 4 were with @unsigned short@ as @SmallExponent_t@ (otherwise CoCoA has suddenly beco...
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- I would like @VersionInfo@ to tell me also how many bits are in @SmallExponent_t@ (since this does seem to affect exe...
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- The order of the fields printed by @VersionInfo@ is alphabetical. This means that some pieces of info are ordered st...
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- Is this issue still relevant?
Close? Reject? -
- Currently the script reports a very succinct error message if the executables cannot run (probably due to shared libr...
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- I have checked in the code.
03 Nov 2020
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- Can we make the link for the imminent (interim) release?
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- This is what happens now:...
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- I have made a change (by adding a call to mem fn @asRightValue@).
Now the code seems to be doing more or less what I... -
- Here is a little doc (where should it really go?)
The new script expects one of two possibilities for the @bin/@ d... -
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- I have checked in (despite the presence of some experimental changes).
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- I have implemented *@RingElemVec@*; the code is mostly shared with @RingElems@.
02 Nov 2020
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- I do not understand lines 146 and 147 in @AST.H@.
They seem to say that everything can be indexed by both INT and ST... -
- Na toll:...
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- There is a fn *@canBeIndexedByBigInt@*, but there does not seem to be a @canBeIndexedByString@*.
Maybe I should ma... -
- I have a partial fix: the error mesg now says "Expecting type STRING" if the value being indexed is a @RECORD@ otherw...
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