On Thu, Jun 17, 2010 at 7:03 PM, William Stein wrote:
> Yes, remove it.
This is now ticket #9257:
http://trac.sagemath.org/sage_trac/ticket/9257
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Minh Van Nguyen
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The distinction that may be worth making is that there are (at least)
two
notions of factorial. One that is subject to symbolic simplification
and one
that is a numerical subroutine. There may be yet more.
The simplification version allows for
factorial(n+1)/factorial(n) ---> n+1 and does not r
Apologies for spamming multiple Sage groups, but I thought folks would like to
hear about his:
http://mathbuntu.org
Basically a script for (K)Ubuntu that automates pulling down and installing a
variety of math software (Sage, Geogebra, Maxima, R, Octave) and about ten free
university-level ma
Hi Thanassis,
On Thu, Jun 17, 2010 at 11:16 PM, Thanassis Tsiodras
wrote:
> A casual report on how I used SAGE and various other
> programs/technologies over the years to solve the famous "crossing
> ladders" puzzle.
> You may find it interesting...
>
> http://users.softlab.ece.ntua.gr/~ttsiod/la
It's summertime, and I thought I would have time to build a Sage
server for my 65 (or so) calculus students. I have a Ubuntu box
running 10.04 and using dynamic dns, I should be able to be able to
point my students to the site. Using virtual box, I assume not much
damage can be done to the host m
On 06/17/10 11:34 PM, MartinX wrote:
On Jun 13, 2:25 pm, "Dr. David Kirkby"
wrote:
1) Make is unset on all platforms. Would it not be wiser to find out where
problems exist, and do things like this for only one platform, or one
distribution?
I have tried a parallel build of Atlas without su
On Jun 13, 2:25 pm, "Dr. David Kirkby"
wrote:
>
> 1) Make is unset on all platforms. Would it not be wiser to find out where
> problems exist, and do things like this for only one platform, or one
> distribution?
>
I have tried a parallel build of Atlas without success (using
GCC4.2.2). But the
Hi there,
> > In Sage, the behavior of sqrt(2) versus sqrt(4) is considered very
> > reasonable
> > to most users. And it does exactly what you claim is "rather bad form".
> >
> > sage: sqrt(2)
> > sqrt(2)
> > sage: sqrt(4)
> > 2
> > sage: type(sqrt(2))
> >
> > sage: type(sqrt(4))
> >
>
On Jun 17, 12:51 pm, William Stein wrote:
> In Sage, the behavior of sqrt(2) versus sqrt(4) is considered very reasonable
> to most users. And it does exactly what you claim is "rather bad form".
>
> sage: sqrt(2)
> sqrt(2)
> sage: sqrt(4)
> 2
> sage: type(sqrt(2))
>
> sage: type(sqrt(4))
>
Th
Why is it that we have the World graph hard-coded? Wouldn't it be
better to get an up-to-date world graph? (There are 100 more countries
on the CIA factbook---referred to in the docstring---than there are in
the returned graph).
What about including instructions in the docstring, or even code, to
Unsurprisingly, setting the random seed makes the random_expr() always
return the same value:
sage: set_random_seed(0xdeadbeef)
sage: random_expr(5)
tanh(-pi^real_part(v1)*sin(log(pi)*imag_part(v1)))
sage: set_random_seed(0xdeadbeef)
sage: random_expr(5)
tanh(-pi^real_part(v1)*sin(log(pi)*imag_par
Hello everybody,
A while ago I noticed that my *new independent module* on toric
varieties causes an error in a really obscure long output for one of
the tests in symbolic/random_tests.py. Volker Braun pointed in
http://trac.sagemath.org/sage_trac/ticket/8988#comment:9
"I think the change in the
On Thu, Jun 17, 2010 at 12:14 PM, Nils Bruin wrote:
> On Jun 17, 10:32 am, Robert Dodier wrote:
>> On Jun 16, 11:24 am, Tom Coates wrote:
>>
>> > A) factorial(x) should raise an error;
>>
>> > B) factorial(x) should return gamma(x+1).
>>
>> More generally, the question is what to do with somet
On Jun 17, 10:32 am, Robert Dodier wrote:
> On Jun 16, 11:24 am, Tom Coates wrote:
>
> > A) factorial(x) should raise an error;
>
> > B) factorial(x) should return gamma(x+1).
>
> More generally, the question is what to do with something
> which doesn't make sense according to whatever rules ha
On Jun 16, 11:24 am, Tom Coates wrote:
> A) factorial(x) should raise an error;
>
> B) factorial(x) should return gamma(x+1).
More generally, the question is what to do with something
which doesn't make sense according to whatever rules have
been established so far. I claim the "mathematical"
Hello,
On Thu, Jun 17, 2010 at 1:37 AM, David Kirkby wrote:
> Does anyone have an estimate of when 4.4.4.alpha1 will be available?
Sorry about the delay -- I've been under the weather and had family
visiting. You can find alpha1 in
http://sage.math.washington.edu/home/release/sage-4.4.4.alpha1
On Jun 17, 3:07 am, David Kirkby wrote:
...
> BTW, the #6 hit for factorial in Google, and the number 1 hit for
> factorial calculator is this
>
> http://www.cs.uml.edu/~ytran/factorial.html
>
> One might have hoped a professor of computer science could have done a
> bit better.
1. It appears
Our geometry lab has a good deal of existing code for hyperbolic
geometry, and one of my goals this summer is to port it to Sage. I
spoke with Bill Goldman, who heads the lab, and he's on board with
GPLing the code and releasing it into the Sage code base if that's
something people want.
Right n
It is my recollection that the definition of sqrt of a negative
number, say -9, in the unix math library
is the sqrt of abs value. Hence it returns 3. So that's another
choice.
Contrary to Tom's note, I am not requiring that the range and domain
of a function be the same,
though it may have appea
Hi,
I had the idea to combine a very small basic Linux with Sage to use it
as a virtual machine image (for PC). In a squashed Filesystem this
could be as small as 420 MB. Unfortunatly I get an Error - see below -
when building sage on this system. Has this been tried before and is
it worth the eff
Ticket updated !
http://trac.sagemath.org/sage_trac/ticket/9249
Thank you all for your help ! :-)
Nathann
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On 16 June 2010 15:48, rjf wrote:
>
>
> On Jun 15, 9:28 pm, Tom Coates wrote:
>
> By your reasoning, and for other domains we would have the following
> behavior:
> sqrt(-1) --> error. after all, some Sage users may not have
> encountered imaginary numbers.
> RJF
That's a very weak argument.
On Thursday, June 17, 2010, David Kirkby wrote:
> On 17 June 2010 08:42, Minh Nguyen wrote:
>> Hi folks,
>>
>> The file misc/darcs.py was meant to serve as an interface to the Darcs
>> source code version control system, back in the old days before Sage
>> switched to using Mercurial. With the up
Does anyone have an estimate of when 4.4.4.alpha1 will be available?
Are many of the fixes for 64-bit OpenSolaris likely to be in this -
there are about a dozen with positive review - see
http://trac.sagemath.org/sage_trac/ticket/9026
I've been approached by a couple of people who will probably
Hi Nathann,
On Thu, Jun 17, 2010 at 3:45 AM, Nathann Cohen wrote:
> Just a question about this "OptionalPackageNotInstalledError"
> exception mentionned about the bug you found in is_hamiltonian... It
> sounds like it should be used in a lot of places if it is to become
> the standard way of s
On 17 June 2010 08:42, Minh Nguyen wrote:
> Hi folks,
>
> The file misc/darcs.py was meant to serve as an interface to the Darcs
> source code version control system, back in the old days before Sage
> switched to using Mercurial. With the upcoming Sage 5.0 milestone, I
> think that module can be
Hi folks,
The file misc/darcs.py was meant to serve as an interface to the Darcs
source code version control system, back in the old days before Sage
switched to using Mercurial. With the upcoming Sage 5.0 milestone, I
think that module can be removed from the Sage library. I believe its
removal w
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