On Mar 21, 2007, at 1:37 AM, Robert Bradshaw wrote:
> One could also force all keys of a
> hashtable to live in a given ring.
I don't think you'd want to do that. First, it wouldn't even solve
the problem (e.g. because of the precision issues you raised before
-- you can have two elements o
On Mar 21, 2007, at 1:38 AM, William Stein wrote:
> That said, we simply can't require
> (*) "a == b ==> hash(a) == hash(b)"
> in SAGE, because mathematics is simply too complicated for this sort
> of rule. So what is done in SAGE is to _attempt_ to satisfy (*)
> when it
> is reasonably eas
On 3/20/07, David Harvey <[EMAIL PROTECTED]> wrote:
> On Mar 21, 2007, at 1:19 AM, Nick Alexander wrote:
> > On Mar 20, 4:12 pm, William Stein <[EMAIL PROTECTED]> wrote:
> >> On Tuesday 20 March 2007 4:00 pm, Nick Alexander wrote:
> >>> For some reason, google won't let me grab your patch. Anyway
On Mar 20, 2007, at 10:27 PM, David Harvey wrote:
> On Mar 21, 2007, at 1:19 AM, Nick Alexander wrote:
>
>> On Mar 20, 4:12 pm, William Stein <[EMAIL PROTECTED]> wrote:
>>> On Tuesday 20 March 2007 4:00 pm, Nick Alexander wrote:
>>>
For some reason, google won't let me grab your patch. Anyw
On Mar 21, 2007, at 1:19 AM, Nick Alexander wrote:
> On Mar 20, 4:12 pm, William Stein <[EMAIL PROTECTED]> wrote:
>> On Tuesday 20 March 2007 4:00 pm, Nick Alexander wrote:
>>
>>> For some reason, google won't let me grab your patch. Anyway,
>>> converting to string is not a good idea. Better
On Mar 20, 4:12 pm, William Stein <[EMAIL PROTECTED]> wrote:
> On Tuesday 20 March 2007 4:00 pm, Nick Alexander wrote:
>
> > For some reason, google won't let me grab your patch. Anyway,
> > converting to string is not a good idea. Better to hash a tuple of
> > real, imag I think. (Maybe you
On 3/20/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
> there is trouble with the determinant method on a matrix over a funky ring
> (yes, the same funky ring causing all my other problems). in its simplest
> form:
>
> In [43]: W.=QQ['w']
> In [44]: WZ.=W['z']
> In [45]: matrix(WZ,2,2,[1,z,z,z^2]).det
there is trouble with the determinant method on a matrix over a funky ring
(yes, the same funky ring causing all my other problems). in its simplest
form:
In [43]: W.=QQ['w']
In [44]: WZ.=W['z']
In [45]: matrix(WZ,2,2,[1,z,z,z^2]).det()
Out[45]:
the analog over a "shallower" polynomial ring
On Tuesday 20 March 2007 5:30 pm, Kyle Schalm wrote:
> > Work over QQ instead:
> >
> > sage: W. = QQ['w1','w2']
> > sage: factor(w1*w2)
> > w2 * w1
> >
> > One can reduce factoring over ZZ to over QQ, with some work.
> > Volunteers...?
> >
> > William
>
> oh good, an easy workaround. the same tric
On 3/20/07, Jonathan Hanke <[EMAIL PROTECTED]> wrote:
> I know you must be answering a million of these, so only if you have a
> free minute, do you know when sage.math.washington.edu will be back
> online? Thanks,
Optimistically, it will be back on Friday. It is down because of work
in the ser
>
> Work over QQ instead:
>
> sage: W. = QQ['w1','w2']
> sage: factor(w1*w2)
> w2 * w1
>
> One can reduce factoring over ZZ to over QQ, with some work.
> Volunteers...?
>
> William
oh good, an easy workaround. the same trick doesn't seem to work if the
base ring is a polynomial ring, that is,
On 3/20/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
>
>
> how hard would it be to make this work?
>
> W. = ZZ['w1','w2']
> factor(w1*w2)
>
>
> i'm using sage 2.3. if somebody could send me a code snippet,
> it would be hugely appreciated.
Work over QQ instead:
sage: W. = QQ['w1','w2']
sage: fact
how hard would it be to make this work?
W. = ZZ['w1','w2']
factor(w1*w2)
i'm using sage 2.3. if somebody could send me a code snippet,
it would be hugely appreciated.
kyle
--~--~-~--~~~---~--~~
To post to this group, send email to sage-devel@googlegroups.com
On 3/20/07, Nick Alexander <[EMAIL PROTECTED]> wrote:
>
> My guess is that the pari conversion code is not being careful with
> the variable names, but I haven't really tried it. Makes it pretty
> hard to work with number fields, no?
>
> Nick
>
> sage: (QQ['x'].0^2 + 1).is_irreducible()
> True
>
My guess is that the pari conversion code is not being careful with
the variable names, but I haven't really tried it. Makes it pretty
hard to work with number fields, no?
Nick
sage: (QQ['x'].0^2 + 1).is_irreducible()
True
sage: (QQ['a'].0^2 + 1).is_irreducible()
-
On Tuesday 20 March 2007 4:00 pm, Nick Alexander wrote:
> For some reason, google won't let me grab your patch. Anyway,
> converting to string is not a good idea. Better to hash a tuple of
> real, imag I think. (Maybe you did this already?)
You have to be really careful, since if a == b,
then
For some reason, google won't let me grab your patch. Anyway,
converting to string is not a good idea. Better to hash a tuple of
real, imag I think. (Maybe you did this already?)
I don't seem able to send in a key function sorted; I'll try
sort(cmp=) in a moment. I wonder if I hit a Pyrex bug
Hi,
Good news -- I took this downtime as a chance to install RHEL (Redhat
Enterprise Linux) on sage.math.washington.edu. By default it booted up with
a kernel that works and correctly recognizes all SIXTEEN cores on sage.math.
So now sage.math is twice as "super", since before with Ubuntu only
On Tuesday 20 March 2007 9:30 am, Hamptonio wrote:
> Just to clarify: the downloading problem isn't biopython-specific - I
> can't get anything from www.sagemath.org through sage, only from a
> browser. For example, 'sage -optional' fails as well.
Sorry, you have to do this (note the http://) --
On Mar 20, 2007, at 09:30 , Hamptonio wrote:
>
> Just to clarify: the downloading problem isn't biopython-specific - I
> can't get anything from www.sagemath.org through sage, only from a
> browser. For example, 'sage -optional' fails as well.
www.sagemath.org seems to be down for the count.
Just to clarify: the downloading problem isn't biopython-specific - I
can't get anything from www.sagemath.org through sage, only from a
browser. For example, 'sage -optional' fails as well.
-MH
On Mar 20, 10:31 am, "Hamptonio" <[EMAIL PROTECTED]> wrote:
> Woo-hoo! Thank you!!!
>
> I had the sa
Woo-hoo! Thank you!!!
I had the same error as before on my Mac Pro - the
'...
in open_local_file
raise IOError(e.errno, e.strerror, e.filename)
IOError: [Errno 2] No such file or directory: 'www.sagemath.org/
packages/optional/biopython-1.43.spkg'
sage: Failed to download package biopython-1.
Great! I am once again amazed by your speed.
I set SAGE_SERVER as you said, but my attempt at installing fails to
get the package. The output is appended below. I doing this on a PPC
(G4) Apple powerbook, with sage 2.0 upgraded to 2.3.
I had tried to read the documentation you suggested - I w
23 matches
Mail list logo
