I'm forwarding to the sage-combinat group, where the people who know
this code well have a better chance of seeing it.
On 05/12/2011 06:19 PM, Matthias wrote:
Hi,
i don't really know whether this is a bug, but at least it seems a bit
odd to me (are alphacheck supposed to have different
And two fewer than that...
sage: Zmod(5)
Ring of integers modulo 5
(Sorry, couldn't resist.)
On 01/04/2011 11:33 AM, Volker Braun wrote:
You can even shave off two more key strokes and type:
sage: ZZ.quo(5)
Ring of integers modulo 5
:-)
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On 09/29/2010 01:47 PM, Johannes wrote:
Hi list,
is it possible to create in a given environment in sage a new one, which
know all in the parent defined variables and values, and i i leave it
again, ijust get back to my old values?
Is this what you're looking for?
Hello,
For polynomial equations, the following should work in general.
sage: R.x,y = CC['x','y']
sage: f = x-y
sage: g = x^2 - y^2
sage: I = R.ideal([f]).radical()
sage: g in I
True
In general, to see if the equation g == 0 is implied by the equations
f1==0, f2==0, ..., fn==0 you can do
I =
I'm not sure I completely understand your question, but maybe this
response will contain all the ingredients you need.
First, since you are working with polynomials, I suggest creating a
polynomial ring in the variables x and y, and then your polynomial f.
sage: R.x,y = QQ['x,y']
sage: f = 3*x^2
Is this what you want?
sage: v = vector(2^i for i in xrange(1,10))
sage: print v
(2, 4, 8, 16, 32, 64, 128, 256, 512)
-Jason
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Hi,
On 08/23/2010 03:42 PM, robin hankin wrote:
I tried this:
roots = solve(x^3+10*x^2+11*x+8==0,x)
SNIP
The best I can do is
N(roots[1].rhs())
but this is just one at a time. How do I make N() operate on all of roots?
You may like
for r in roots:
print N(r.rhs())
or
Hello,
I think this is normal. Perhaps you meant the following (note the *
which expands the single argument into its components):
sage: for x in itertools.chain(*itertools.imap(Permutations,range(4))):
print x
[]
[1]
[1, 2]
[2, 1]
[1, 2, 3]
[1, 3, 2]
[2, 1, 3]
[2, 3, 1]
[3, 1, 2]
[3, 2, 1]
Leo Maloney wrote:
I'm trying to compute the inverse of a 5000 x 5000 sparse matrix. I'm
getting an EOF error after it runs for about 5 hours, and then it
states that sage is trying to access unallocated memory. Is there a
way I can increase the memory for this computation? Every time I
Hi,
I think what Minh was trying to say is that these lines:
Stochastix wrote:
sage: a=lambda x: alpha*x-mu1+mu2
sage: f=lambda x: (a(x)*b-c+sqrt((a(x)*b-c)^2+4.0*a(x)*b*r*mu1))/(2*a
(x)*mu1)
sage: g=lambda x: (r+l-mu1*f(x))/mu2
sage: prev=lambda x: f(x)/(f(x)+g(x))
sage: k=lambda x:
Alasdair wrote:
This is more of a python question than a Sage question, but
anyway...I'm trying to iterate over a list, producing a sequence of
new lists, each of which is obtained from the original list by
deleting one object. I've tried:
for x in lst:
lstc=copy(lst)
print
...or is it just me?
TIA,
Jason
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William Stein wrote:
On Mon, May 25, 2009 at 4:58 PM, Jason Bandlow jband...@gmail.com wrote:
...or is it just me?
it's indeed down. I'll restart all the sagenb servers right now.
They'll be back in 5 minutes.
Thanks!
-Jason
David Joyner wrote:
On Tue, May 12, 2009 at 6:43 PM, amps arat...@gmail.com wrote:
I see that there is a function to compute the character table of the
symmetric group, but is there one where you input two partitions and
it outputs the value of the character indexed by the first partition
William Stein wrote:
On Thu, Mar 26, 2009 at 8:50 AM, Jason Bandlow jband...@gmail.com wrote:
Hi all,
When I start up a clean version of sage 3.4 on my local machine and
enter the following into a notebook cell:
M=load('http://www.math.upenn.edu/~jbandlow/sage_data
Hi all,
When I start up a clean version of sage 3.4 on my local machine and
enter the following into a notebook cell:
M=load('http://www.math.upenn.edu/~jbandlow/sage_data/dic_of_kst_to_G_cob_mats.sobj')
# This object is a dictionary
key = (1, Partition([1]),Partition([2]))
print key in
works:
sage: a = float(1.0)
sage: QQ(RR(a))
1
I'm happy to open a ticket if that's the right thing to do here.
Thanks,
Jason Bandlow
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at the
moment. That way I only have to load one file at the start of my session.
Any advice is much appreciated!
Thanks,
Jason Bandlow
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Robert Bradshaw wrote:
On Mar 21, 2009, at 9:06 AM, Jason Bandlow wrote:
Hi all,
Is the following missing coercion known? I couldn't find anything on
trac, but there's a lot there related to coercion, so I may have
missed it.
sage: a = float(1.0)
sage: QQ
specific about what 'save' does that does not work for you?
Best,
Jason Bandlow
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Hi Matthew,
Matthew J wrote:
Sage is great software that I rave about in pretty much all of my
classes except for probability theory. I’d like to get some info on a
few topics to clear some things up so that I can use these for classes
and to post to an examples worksheet. Thanks in advance
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi Stan,
I think I saw one question you asked that hasn't been answered yet:
Stan Schymanski wrote:
snip
If I construct a list out of two other lists, I usually don't
expect the original lists to change if I manipulate the resulting
list. How
Hi all,
A student of mine noticed the following and it looks like a bug to me
(at least with the documentation).
From the notebook with 3.1.2 (sage prompts added for readability):
sage: plot?
File:
/home/jason/sage/local/lib/python2.5/site-packages/sage/plot/plot.py
Type:type
Thanks Michael,
Check your home
directory for any file with an accent or Umlaut and you likely found
the culprit you need to rename.
This fixed the problem. Good luck with ecls.
Cheers,
Jason
mabshoff wrote:
On Sep 15, 6:34 pm, Jason Bandlow [EMAIL PROTECTED] wrote:
Hello,
I've
Hello all,
Regarding doctesting, I'd like to work with the following setup:
1. Create a file work.sage (or work.py) somewhere in my home directory.
2. Start a notebook session, and attach work.sage.
3. Use the notebook for generating and staring at data, while using a
text editor to modify my
William Stein wrote:
On Tue, Apr 15, 2008 at 9:11 AM, Jason Bandlow [EMAIL PROTECTED] wrote:
Hello all,
Regarding doctesting, I'd like to work with the following setup:
1. Create a file work.sage (or work.py) somewhere in my home directory.
2. Start a notebook session, and attach
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