Le 19/02/2019 à 21:43, Jori Mäntysalo (TAU) a écrit :
Is there a fast way to compute for example
Compositions(15, min_length=10, max_length=10).cardinality()
in some package already integrated to SageMath? For Partitions(...) that
seems to be the case, but Compositions(...) uses just brute enum
There is the cardinality method of IntegerVectors. Note that the default
for min_part is 0.
It is implemented in src/sage/combinat/integer_vector.py without brute
force enumeration under some constraints. Looking at it now, I think
there is a bug at line 1331: It will never enter the if clause
I am guessing that it should be sufficiently fast to compute the
cardinality using the generating series. That is, for compositions with
parts in a set S this would be
1/(1-sum_{s in S} x^s)
with special cases S = {a,...,b} and S = {a,...}
Martin
Am Dienstag, 19. Februar 2019 22:03:43 UTC+1
I do think that P = Partitions(15, min_length=10, max_length=10);
P.cardinality() also uses brute force. (at least P.cardinality?? says so).
Would be great, though!
Martin
Am Dienstag, 19. Februar 2019 21:43:36 UTC+1 schrieb Jori Mäntysalo (TAU):
>
> Is there a fast way to compute for example
Is there a fast way to compute for example
Compositions(15, min_length=10, max_length=10).cardinality()
in some package already integrated to SageMath? For Partitions(...) that
seems to be the case, but Compositions(...) uses just brute enumeration.
--
Jori Mäntysalo
Tampereen yliopisto - Ihm
Tue 2019-02-19 18:13 UTC, Dima:
>
> Trac keyword spkg-configure gives a list of relevant tickets.
Direct link:
https://trac.sagemath.org/query?order=id&desc=1&keywords=~spkg-configure
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Trac keyword spkg-configure gives a list of relevant tickets.
On Tue, 19 Feb 2019 18:41 Thierry Hi,
>
> On Mon, Feb 18, 2019 at 04:07:07PM +0100, E. Madison Bray wrote:
> [...]
> > Fixing that's something I've been working toward for practically as
> > long as I've been working on the project, an
Hi,
On Mon, Feb 18, 2019 at 04:07:07PM +0100, E. Madison Bray wrote:
[...]
> Fixing that's something I've been working toward for practically as
> long as I've been working on the project, and we've been making real
> progress lately, which you are encouraged to join in and help with...
Perhaps c
On Tue, Feb 19, 2019 at 1:51 PM Andrew wrote:
>
>
>
>> Do you mean that after installing Mojave you never again managed
>> to compile Sage? Do you still have a working version of Sage?
>> Which version is that?
>
>
> I no longer have a working version of sage.
>>
>>
>> Have you tried installing t
On Tue, Feb 19, 2019 at 9:18 AM Dima Pasechnik wrote:
>
> On Mon, Feb 18, 2019 at 11:37 PM John H Palmieri
> wrote:
> >
> > On one of my machines running OS X Mojave, when I run 'make', the pip
> > installation fails, saying
> >
> > ModuleNotFoundError: No module named 'zlib'
> >
> > That's whe
On Tue, Feb 19, 2019 at 11:21 AM Emmanuel Charpentier
wrote:
>
> Dear Erik Madison,
>
> What setup would you like to test this patch ? My "everyday" machines do have
> routinely matched gcc, g++,and gfortran packages : in such a setup, the test
> would be useless, since gfortnat wouldn't be inst
Do you mean that after installing Mojave you never again managed
> to compile Sage? Do you still have a working version of Sage?
> Which version is that?
>
I no longer have a working version of sage.
>
> Have you tried installing the SageMath 8.6 binary for macOS from
>
> http://www.sagem
Dear Erik Madison,
What setup would you like to test this patch ? My "everyday" machines do
have routinely matched gcc, g++,and gfortran packages : in such a setup,
the test would be useless, since gfortnat wouldn't be installed.
Would a Debian virtual machine bearing the minimum dependencies d
On Mon, Feb 18, 2019 at 11:37 PM John H Palmieri wrote:
>
> On one of my machines running OS X Mojave, when I run 'make', the pip
> installation fails, saying
>
> ModuleNotFoundError: No module named 'zlib'
>
> That's when the solution is
>
> ./sage -f zlib python2 python3
> make
>
so this points
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