Activity
From 20 May 2019 to 18 Jun 2019
18 Jun 2019
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15:22 Feature #487: ScalarProduct accepts MatrixRow?
- Anna Maria Bigatti wrote:
> I like defining (mathematically) matrix multiplication by scalar products, so I'm in fav... -
- From what you say, I think you are passing a @MATRIXROW@ as an argument (because you say you cannot call @NumCols@).
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17 Jun 2019
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11:46 Feature #1296 (In Progress): Matrixrow-functions
- The specific request to make @len@ or @NumCols@ work for a @MATRIXROW@ should not be too hard to achieve. Which func...
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- The "easy solution" is to use @GetRow(M,1)@ or @R:=GetRows(M); R[1]@ instead of @M[1]@. But this makes copies of the...
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05:45 Feature #1272: Groebner Bases over ZZ
- We modified our package following Robbiano's examples that you can find below.
use ZZ[x,y,z];
f1 := x^2-2*y;
f2...
16 Jun 2019
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21:54 Feature #1296 (In Progress): Matrixrow-functions
- I ran into a problem concerning matrix-rows. Namely, I wanted to implement a function returning the Hamming-weight of...
06 Jun 2019
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- If I compile Cocoa5 and one of the packages loaded automatically (so any package-file inside of @src/CoCoA-5/packages...
04 Jun 2019
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20:29 Feature #1293: Vim Plugin for CoCoA
- Anna Maria Bigatti wrote:
> Sorry, I cannot stop myself thinking of this xkcd: https://xkcd.com/378/ ;-)
Haha! F... -
- Sorry, I cannot stop myself thinking of this xkcd: https://xkcd.com/378/ ;-)
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- can you send me the line you added?
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- In order to minimize the output of the GB we added the reduction via the GCD of the LCs to the computation of the min...
30 May 2019
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- Julian and I created a CoCoa plugin for Vim that provides some basic syntax highlighting, indentation and snippets: h...
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- There are quite a few functions which accept as arg @INT@ or @RAT@.
The current solution is to call @evalArgAsT1or... -
- I have to prepare the package, now it is just a collection of functions. After that for me is fine, we can do it!
...
29 May 2019
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- Florian Walsh wrote:
> So here is my implementation. It is based on this thesis https://kluedo.ub.uni-kl.de/files/44... -
- So here is my implementation. It is based on this thesis https://kluedo.ub.uni-kl.de/files/4457/phd.pdf by A. Popescu...
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- May I ask why you want to have assertions which can be globally enabled/disabled?
[I know that this is what we do in... -
- Thank you, it works flawlessly (with the C++ impl).
However, I think it would be better it there would be some kind ...
28 May 2019
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- Here is a potential impl:...
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- Would someone like to post a couple of hypothetical examples of how you might like to use this feature (so that we ca...
27 May 2019
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- Sometimes @LinearSimplify@ could produce a simpler result:...
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- I have modified the fn @evalArgAsListOfSymbols@ so that it accepts records with just a @head@ field and no @indices@ ...
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- John Abbott wrote:
> The manual page for @NewPolyRing@ could be improved (and made shorter).
> I find the discussio... -
- I agree: ok for treating "no indices" as "empty indices".
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- The manual page for @NewPolyRing@ could be improved (and made shorter).
I find the discussion about @::=@ to be an u... -
- It seems superfluous to have to specify an empty list of indices if one wants no indices; should we allow the @indice...
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- True. In fact, most of tests in @src/CoCoA-5/tests@ contain this function (which does a few more things)...
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- For debugging purposes an 'assert'-function comparable to COCOA_ASSERT (from CoCoALib) would be useful.
(One can a...
24 May 2019
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- The source code for the function @len@ is in file @BuiltinFunctions-CoCoALib.C@ around line 100.
The code recognis... -
- The manual entry for @len@ looks a bit strange, and is hard to read. It says the fn signature is...
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- I was surprised to discover that @len@ can be applied to a @RINGELEM@....
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- We also wrote a prototype implementation of GBasis over ZZ. In particular we focused on minimal strong GBasis. Maybe ...
23 May 2019
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- The relevant source code is in @Parser.C@ around line 360 in the function @parseUseStatement@.
I think it may be ... -
- Consider this excerpt:...
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- What exactly should the function do? What should it be called?
* *(A)* simplest is to accept @RINGELEM@ and @INT@... -
- Proposal: create a new function which takes a ring and a list, and returns a list of RINGELEM belonging to the speci...
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- I'm very unhappy about the CPU "burning" (it might well be a Google revenge tactic).
Also after visiting the page ... -
- The world map showing where visitors to the CoCoA website come from causes trouble in "private mode" in Firefox:
* t... -
- Should we close this? Ater all 5.2.4 has been released.
What about the problem with "forever loading"?
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- Florian Walsh (Passau) has an prototype implementation of GBasis over ZZ, currently as a package in CoCoA-5. He is w...
22 May 2019
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- I suspect that the main problem is that @append@ is terribly slow -- I'm pretty sure it makes needless copies.
Her... -
- @CartesianProductList@ is defined in @list.cpkg5@
Ange reported that @CartesianProductList@ is slow; maybe I had a... -
- The examples above are not tiny, but also not so large. The resulting lists contained 32768 elements, and each eleme...
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- Cartesian product operator is much faster than @CartesianProductList@.
Example:...
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