On Tuesday 01 March 2011, Simon King wrote:
> Hi Robert,
>
> On 1 Mrz., 01:00, Robert Goss wrote:
> > I have 2 ideals over the complex field and I would like to take their
> > intersection. If I try and use the intersection method on one of the
> > ideals i get an error message from singular stat
Robert,
You have been answered how to solve the problem. But I would like to
remark Volker's advice.
Do not use ideals over CC. CC is an inexact ring, so most operations
will fail. Work instead over the rationals.
R. = PolynomialRing(QQ,2)
or if you need complex numbers, you may try with a numb
Thank you very much for your advice. I was trying to work out if the
problem lay with me sage or documentation.
> Do not use ideals over CC. CC is an inexact ring, so most operations
> will fail. Work instead over the rationals.
>
> R. = PolynomialRing(QQ,2)
>
> or if you need complex numbers, you
No, it is not an exact computation over the complex, they are gauss
rationals a+b*I where a and b are rationals. As far as I know there is
no exact complex field implementation that is good for working with
ideals.
What kind of generators of ideals are you dealing with?
Note that even if the inpu
> No, it is not an exact computation over the complex, they are gauss
> rationals a+b*I where a and b are rationals. As far as I know there is
> no exact complex field implementation that is good for working with
> ideals.
Ah yes that would make a lot of sense.
I will go back to my problem and se
On Mon, 28 Feb 2011 at 11:32AM -0800, sm123123 wrote:
> It seems that I was unable to convey the issue at hand. For
> Mathematica, I can issue a Plot[] command, followed by an Export[] and
> then use \includegraphics to use the generated plot (the its not good
> enough section in the SageTeX manual
> What kind of generators of ideals are you dealing with?
For reference all the input generators are in QQ.
Robert
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On Mar 1, 12:59 pm, Robert Goss wrote:
> > What kind of generators of ideals are you dealing with?
>
> For reference all the input generators are in QQ.
>
> Robert
Then, definitely you should work in PolynomialRing(QQ,2)
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To u
Sigh.
When I issue a plot() command using the Matlab interface, I get a
syntax error.
On Mar 1, 5:43 am, Dan Drake wrote:
> On Mon, 28 Feb 2011 at 11:32AM -0800, sm123123 wrote:
> > It seems that I was unable to convey the issue at hand. For
> > Mathematica, I can issue a Plot[] command, follow
On 1 March 2011 17:57, sm123123 wrote:
> Sigh.
>
> When I issue a plot() command using the Matlab interface, I get a
> syntax error.
I think the MATLAB interface might be an optional component. Check the docs
Dave
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I'm affraid I cannot help you on the Matlab front (I don't have it
installed), but have you considered using pyplot (from matplotlib)?
It's basically a clone of the Matlab plotting framework. I've used it
recently to make a semilog plot with excellent results.
On 1 mar, 12:57, sm123123 wrote:
> S
No.
I use matlab extensively for data analysis and have a large library of
code already written in matlab.
I do not want to invest the time required in porting all that.
On Mar 1, 12:16 pm, Maxim wrote:
> I'm affraid I cannot help you on the Matlab front (I don't have it
> installed), but have
On Feb 24, 10:57 am, Volker Braun wrote:
> On Thursday, February 24, 2011 6:29:11 PM UTC, Dmitri wrote:
>
> > I think my problem is actually doing the comparison. So I have this
> > chosen set of points which I don't know is convex. I compute its
> > convex hull. Now how do I compare these two obj
On Tuesday, March 1, 2011 9:55:01 PM UTC, Ursula Whitcher wrote:
>
> This won't always work.
>
I agree with your example, of course. But I interpreted Dmitri's question
somewhat differently, that he wants to start with some set of lattice points
and find out if they all lattice points of the co
I just discovered sage.finance.stock, it looks very interesting. I tried to
enter a quotron for the Dow-Jones average (for purposes of comparison with
different specific stocks), but it seems the class won't accept any symbols
I can locate for this entity.
In experiments after drilling down int
Logical connectives operates on integers, so things like n & m, n | m
(n,m integers) always produce an answer. e.g. -2 & 10 = 10 , -2 & -3
=4, 2 & 4 =0
I wonder what they mean? I failed to find the answer by a few quick
searches.
Thanks in advance
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On 3/1/11 11:53 PM, pong wrote:
Logical connectives operates on integers, so things like n& m, n | m
(n,m integers) always produce an answer. e.g. -2& 10 = 10 , -2& -3
=4, 2& 4 =0
I wonder what they mean? I failed to find the answer by a few quick
searches.
See
http://docs.python.org/libr
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