On 05/22/2013 12:24 AM, Michael Orlitzky wrote:
Singular (included in sage) has a library that can quickly count the
number of real roots in an interval:
http://mate.dm.uba.ar/~alidick/etobis/rrc.pdf
I don't see an easy way to interface with it, but you could probably
come up with something
Thank You very Much. I have been trying that for day and now after your
advice it worked in mins.
f(x,y) = e^cos(x)-1
a = plot_slope_field(f(x,y), (x,-0,5),(y,-5,5))
v = eulers_method(f,0,0,1/10,5,algorithm="none")
plot(line(v)+a)
That is exactly what i was after.
Thank Again
Dan
On Tuesday,
On 05/20/2013 05:19 PM, Theo Belaire wrote:
> I have a large computation where I need to compute the number of
> positive eigenvalues of a matrix. I am currently computing all the
> eigenvalues then counting how many are positive, but I see when
> profiling that "{method 'roots' of
> 'sage.rings.po
On Tue, May 21, 2013 at 2:15 PM, Daniel Harris
wrote:
> Hello
>
> I am really bogged down now and need some guidance.
>
> I am trying to follow an Open University Maths course but I dont have access
> to MathCad. I can see on paper a graph created in mathcad using the
> eulers_method to graph a di
Hello
I am really bogged down now and need some guidance.
I am trying to follow an Open University Maths course but I dont have
access to MathCad. I can see on paper a graph created in mathcad using the
eulers_method to graph a direcrion/gradient field and solution curve for
the function f(x,y
I have a fixed number of 0 eigenvalues, and no real guarantee that the rest
will be more than δ away for any δ.
I wouldn't mind only recomputing close ones exactly, if I can bound the
error so I know I won't miss any. I know that having more than one
positive eigenvalues will be very rare, if i
On 5/21/13 1:00 PM, Niles Johnson wrote:
On Tuesday, May 21, 2013 1:56:41 PM UTC-4, Jason Grout wrote:
I'm moving the official sage cell server to CentOS, and I've been
working on setting up automated installation for the virtual machines.
This sounds like it would be very useful fo
On 5/21/13 12:56 PM, Jason Grout wrote:
On 5/21/13 12:54 PM, Niles Johnson wrote:
On Tuesday, May 21, 2013 1:25:10 PM UTC-4, Jason Grout wrote:
1. Make sure you have git; if you're on Ubuntu, you�ll also need the
uuid-dev package installed (for �MQ).
Ouch! I'm on RedHat, not Ubun
On Tuesday, May 21, 2013 1:56:41 PM UTC-4, Jason Grout wrote:
>
>
> I'm moving the official sage cell server to CentOS, and I've been
> working on setting up automated installation for the virtual machines.
>
This sounds like it would be very useful for me too -- thanks for looking
into it :)
On 5/21/13 12:54 PM, Niles Johnson wrote:
On Tuesday, May 21, 2013 1:25:10 PM UTC-4, Jason Grout wrote:
1. Make sure you have git; if you're on Ubuntu, you�ll also need the
uuid-dev package installed (for �MQ).
Ouch! I'm on RedHat, not Ubuntu, but I guess I should have noticed tha
On Tuesday, May 21, 2013 1:25:10 PM UTC-4, Jason Grout wrote:
>
>
> 1. Make sure you have git; if you're on Ubuntu, you�ll also need the
> uuid-dev package installed (for �MQ).
>
>
>
Ouch! I'm on RedHat, not Ubuntu, but I guess I should have noticed that
anyway . . .
--
You received th
Installing using the binary download version of sage does not work, gives a
"cannot find such and such file" message. Am trying it with the source
version now.
On Sunday, May 19, 2013 6:03:12 PM UTC-4, Aaron E-J wrote:
>
> I am interested in contributing to the sage cell server and am going
On 5/21/13 12:00 PM, Niles Johnson wrote:
I've tried the sagecell-2013-05-20.spkg with a freshly compiled Sage
5.9, but still get an error. The patches apply, but zeromq does not
install. Looking at the end of the output, I guess I need to install
uuid-dev . . .
Yep. Step 1 in the readme: ht
I've tried the sagecell-2013-05-20.spkg with a freshly compiled Sage 5.9,
but still get an error. The patches apply, but zeromq does not install.
Looking at the end of the output, I guess I need to install uuid-dev . . .
...
Installing zeromq
checking for a BSD-compatible install... /usr/bin/
On 5/21/13 7:39 AM, Theo Belaire wrote:
I haven't explicitly set the ring it's working over, but all the entries
of the matrix are integral.
Are your eigenvalues guaranteed to be a little away from 0, so you could
use numeric approximations? If so, computing the eigenvalues over the
RDF fiel
I haven't explicitly set the ring it's working over, but all the entries of
the matrix are integral.
On Monday, 20 May 2013 20:37:55 UTC-4, William wrote:
>
> On Mon, May 20, 2013 at 2:19 PM, Theo Belaire
> > wrote:
> > I have a large computation where I need to compute the number of
> positiv
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