Dear sage-combinat lovers and Cernay organizers,
From the poll (I appologize that I vote twice) it seems that the week
from 6/2 to 10/2 has the best possible audience (8 people).
http://nuages.domainepublic.net/cd7d/vote/
For my organization (and the one of Stepan), I would like a week to be
On 2011-12-12 00:15, Simon King wrote:
Eventually, it was a one-line change in 29 packages. See #12131, which
is now needing review. I made it a blocker for sage-5.0, but if people
think that openSUSE 12.1 could already be supported by sage-4.8, I
wouldn't object...
If it gets reviewed soon
Hi all
I work a lot with finite fields and polynomials over these, and the
standard string representation of finite field elements as polynomials
is not very convenient for me; I would much prefer to represent each
non-zero element as a power of the field's generator. I am having
trouble making
Hi Johan,
do you have the typeset box checked in your notebook?
If so, then things are displayed using the latex method
instead of the repr one.
Cheers,
Javier
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Hi Nicolas,
On Dec 9, 11:11 am, Nicolas M. Thiery nicolas.thi...@u-psud.fr
wrote:
Just an algorithmic suggestion: what about building the conjugacy
class recursively by conjugating by generators? This is a one liner
with TransitiveIdeal; and roughly speaking, writing C the resulting
conjugacy
I just did some experiments with SQL. I wanted to see if people had
thoughts on the tradeoffs before proceeding.
First of all, size on disk. Storing the Cunningham database using a
list and dictionary requires 1.04MB. The database takes 10.7MB
(perhaps I chose a poor representation. I've
On 12/12/11 7:38 AM, David Roe wrote:
but my guess is that it would take about
90ms (since a single query takes about 80ms to execute).
Did you use an index with the table?
Jason
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but my guess is that it would take about
90ms (since a single query takes about 80ms to execute).
Did you use an index with the table?
Yes. I labelled all of the columns as index=True. I don't know if
that's sufficient, or if the size-on-disk would be a lot less without
redundant indices:
On Dec 12, 11:35 am, javier vengor...@gmail.com wrote:
Hi Johan,
do you have the typeset box checked in your notebook?
If so, then things are displayed using the latex method
instead of the repr one.
Cheers,
Javier
OF COURSE! Thanks for telling me. I would have thought that I had
enough
On Mon, Dec 12, 2011 at 06:12, David Roe r...@math.harvard.edu wrote:
Yes. I labelled all of the columns as index=True.
You should not be indexing all columns, only the ones you are making many
queries upon.
I don't know if that's sufficient, or if the size-on-disk would be a lot
less
On 12/12/11 8:27 AM, Johan S. R. Nielsen wrote:
On Dec 12, 11:35 am, javiervengor...@gmail.com wrote:
Hi Johan,
do you have the typeset box checked in your notebook?
If so, then things are displayed using the latex method
instead of the repr one.
Cheers,
Javier
OF COURSE! Thanks for
On Dec 11, 8:26 pm, William Stein wst...@gmail.com wrote:
Can you please post your code athttp://pastebin.com/or something,
since putting it in email results in it getting all mangled by some
email clients?
Thanks!
William
Sure thing.
A sage worksheet can be downloaded here:
First of all, size on disk. Storing the Cunningham database using a
list and dictionary requires 1.04MB. The database takes 10.7MB
(perhaps I chose a poor representation. I've included my skeleton
below).
This shouldn't be too much of a concern, assuming the source text files
compress
On Mon, Dec 12, 2011 at 07:33, R. Andrew Ohana andrew.oh...@gmail.com wrote:
On Mon, Dec 12, 2011 at 06:12, David Roe r...@math.harvard.edu wrote:
Yes. I labelled all of the columns as index=True.
You should not be indexing all columns, only the ones you are making many
queries upon.
By
So now I have hacked together a patch that works as I will it, both in
the shell and notebook. I think it is a bug that the latex
representation currently ignores the repr-value of the finite field.
What do you other say?
Agreed: latex should respect the repr-value.
And as long as we're on
On 12/12/11 8:48 AM, Jason Grout wrote:
When I was working on similar issues for printing real numbers (i.e.,
whether to truncate digits, etc.), Carl Witty brought up a very good point.
Just to follow up, Carl Witty's point is here:
http://trac.sagemath.org/sage_trac/ticket/7682#comment:32
I
While writing a Cython wrapper for primesieve (http://code.google.com/
p/primesieve/) I have been unable to wrap the generatePrimes function
because of the function pointer argument.
I get Cannot convert 'void' to Python object on the last line
below. Please help me. I have been reading the
return self.thisptr.generatePrimes...
tries to return a C void, but
cdef generatePrimes
is implicitly declared as returning a python object (try cdef
void generatePrimes or return None)
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Thanks Volker. Now I have the following code. I need to take the
Python function callback which takes one argument and create a void
(*callback) (uint32_t) function pointer to pass to
self.thisptr.generatePrimes. How do I do this? Right now I get the
error Cannot convert Python object to 'void
On Mon, Dec 12, 2011 at 07:08, David Roe r...@math.harvard.edu wrote:
On Mon, Dec 12, 2011 at 07:33, R. Andrew Ohana andrew.oh...@gmail.com
wrote:
On Mon, Dec 12, 2011 at 06:12, David Roe r...@math.harvard.edu wrote:
Yes. I labelled all of the columns as index=True.
You should not
On Mon, Dec 12, 2011 at 06:58, David Roe r...@math.harvard.edu wrote:
The extended (Brent) tables I mentioned in my original e-mail are a
bit tricker. Now the load time is significant: 3s currently (using a
pickled dictionary), though I could probably drop that to 2s with
either some
Is there an easy way to print a symbolic expression so that it's valid
python code? E.g.
2*x^2 -- QQ(2) * x**QQ(2)
I frequently deal with expressions that are about two pages long and
would like to be able to copy/paste them without cleaning up the code
and making the expression
I plan to shut down the experimental flask.sagenb.org server tomorrow.
There has been a warning message on the server for about a month now to
this effect. We plan to keep a backup of the worksheets around.
If you have worksheets on flask.sagenb.org that you still want to use,
please move
On Monday, December 12, 2011 5:13:00 PM UTC-8, Michael Orlitzky wrote:
Is there an easy way to print a symbolic expression so that it's valid
python code? E.g.
2*x^2 -- QQ(2) * x**QQ(2)
How about
sage: preparse('2*x^2')
'Integer(2)*x**Integer(2)'
--
John
--
To post to
I'm doing some integrals:
sage: a, b, t = var('a b t')
sage: f(a,b,t) = sin(t)^2/(a + b*cos(t))^2
sage: integrate(f(3/2,1,t), (t,0,2*pi))
-2/5*(sqrt(5) - 3)*pi*sqrt(5)
Okay, that's fine. But
sage: integrate(f(1.5,1,t), (t,0,2*pi))
blows up with:
RuntimeError: ECL says: Error executing code in
On 12/12/2011 10:05 PM, John H Palmieri wrote:
On Monday, December 12, 2011 5:13:00 PM UTC-8, Michael Orlitzky wrote:
Is there an easy way to print a symbolic expression so that it's valid
python code? E.g.
2*x^2 -- QQ(2) * x**QQ(2)
How about
sage: preparse('2*x^2')
Hi David (cc: sage-devel),
sage: float('nan') 1
BOOM!
I've posted a patch at trac 12149 [1] to fix this year-old bug.
Somebody please referee it:
[1] http://trac.sagemath.org/sage_trac/ticket/12149
--
William Stein
Professor of Mathematics
University of Washington
http://wstein.org
Does anyone happen to know why this happens? I have a feeling it is going
to annoy my sometime soon.
Look how long it takes to import mpmath:
$ time sage -python -c import mpmath; print mpmath.__version__0.17
real 0m0.809s
user 0m0.708s
sys 0m0.076s
compared to the time it takes to import the
On Mon, Dec 12, 2011 at 11:27 PM, Jonathan Bober jwbo...@gmail.com wrote:
Does anyone happen to know why this happens? I have a feeling it is going to
annoy my sometime soon.
Look how long it takes to import mpmath:
$ time sage -python -c import mpmath; print mpmath.__version__0.17
mpmath
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