On Jul 13, 8:35 pm, David Sanders wrote:
> On Jul 13, 4:47 pm, Jason Grout wrote:
>
>
>
> > On 7/13/10 4:46 AM, David Sanders wrote:
>
> > > Hi,
>
> > > I need to superimpose several region_plot's. These have regions
> > > colored in di
On Jul 13, 4:47 pm, Jason Grout wrote:
> On 7/13/10 4:46 AM, David Sanders wrote:
>
>
>
> > Hi,
>
> > I need to superimpose several region_plot's. These have regions
> > colored in different colors which may or may not overlap. However, if
> > I
Hi,
I need to superimpose several region_plot's. These have regions
colored in different colors which may or may not overlap. However, if
I do something like
var('p q')
plot1 = region_plot([p+q<1, p+q>-1], (p,-2,2), (q,-2,2), incol='red')
plot2 = region_plot([p-q<1, p-q>-1], (p,-2,2), (q,-2,2), i
On Jul 12, 7:29 pm, Carl Witty wrote:
> On Jul 12, 2:28 am, David Sanders wrote:
>
> > Hi,
>
> > I have been playing around with the implicit_plot3d command, and it's
> > very nice.
>
> > Is there something similar to plot regions defined by inequ
On Jul 12, 12:19 pm, Burcin Erocal wrote:
> Hi David,
>
> On Mon, 12 Jul 2010 02:24:41 -0700 (PDT)
>
>
>
> David Sanders wrote:
> > On Jul 11, 8:13 pm, "ma...@mendelu.cz" wrote:
> > > On 11 čnc, 12:22, William Stein wrote:
>
> &
Hi,
I have been playing around with the implicit_plot3d command, and it's
very nice.
Is there something similar to plot regions defined by inequalities in
3D, along the lines of the Mathematica
RegionPlot3D command? I see that there is an old discussion from 2
years ago about this.
It seems to
On Jul 11, 8:13 pm, "ma...@mendelu.cz" wrote:
> On 11 čnc, 12:22, William Stein wrote:
>
> > On Sat, Jul 10, 2010 at 10:04 PM, David Sanders wrote:
>
> > Maybe
>
> > http://sagemath.org/doc/reference/calculus.html
>
> Perhaps
> also
On Jul 11, 12:22 pm, William Stein wrote:
> On Sat, Jul 10, 2010 at 10:04 PM, David Sanders wrote:
>
> > On Jul 10, 10:01 pm, David Sanders wrote:
> >> Hi,
>
> >> Following up from a couple of my previous posts, I am now wondering
> >> how to do symb
On Jul 10, 10:01 pm, David Sanders wrote:
> Hi,
>
> Following up from a couple of my previous posts, I am now wondering
> how to do symbolic pattern matching for an expression of the following
> form:
Apologies for replying to my own post, but I was wondering if there's
Hi,
Following up from a couple of my previous posts, I am now wondering
how to do symbolic pattern matching for an expression of the following
form:
f, g = function('f g')
i = var('i')
expr = f(i+1) g(i)
I need to extract the "indices" i+1 and i from this expression.
If I simplify to
expr = f
On Jul 9, 3:54 am, Jason Grout wrote:
> On 7/8/10 12:26 PM, David Sanders wrote:
>
>
>
> > Hi,
>
> > How can I manipulate objects with indices?
> > I need to do things like
>
> > a_i + b_i * c_{j+1}
>
> > using a TeX style notation (so that in
On Jul 9, 6:14 am, Jason Grout wrote:
> On 7/8/10 11:38 AM, David Sanders wrote:
>
>
>
> > Hi,
>
> > I am trying to extract part of a symbolic expression.
> > The expression -- an eigenvalue of a matrix -- has the form
>
> > A + B*sqrt(C)
>
&g
On Jul 9, 5:16 am, kcrisman wrote:
> On Jul 8, 2:38 pm, David Sanders wrote:
>
>
>
> > Hi,
>
> > I am trying to extract part of a symbolic expression.
> > The expression -- an eigenvalue of a matrix -- has the form
>
> > A + B*sqrt(C)
>
> > w
On Jul 9, 6:21 am, Jason Grout wrote:
> On 7/7/10 2:34 PM, David Sanders wrote:
>
>
>
> > Hi,
>
> > [Using 'Sage Version 4.4.4, Release Date: 2010-06-23' on Kubuntu
> > 10.04]
>
> > I have just started using Sage, mainly using the noteboo
Hi,
How can I manipulate objects with indices?
I need to do things like
a_i + b_i * c_{j+1}
using a TeX style notation (so that in the last term, the index is j
+1)
where i and j are symbolic.
In Mathematica this would be something like
a[i] + b[i] * c[j+1]
but something like that presumably
Hi,
I am trying to extract part of a symbolic expression.
The expression -- an eigenvalue of a matrix -- has the form
A + B*sqrt(C)
where A, B and C are themselves complicated symbolic expressions.
I wish to extract the subexpression C from this to test where the
eigenvalues change type (where
On Jul 8, 5:45 am, TianWei wrote:
> > I built a worksheet with several cells in the notebook, and then
> > wanted to try to run it on a remote computer using the command line
> > interface. But I could not find a convincing way to export the
> > worksheet to a simple text file that I could impo
On Jul 8, 1:14 am, Mike Hansen wrote:
> On Wed, Jul 7, 2010 at 1:49 PM, David Sanders wrote:
> > I now want to substitute eps=1, so I do
>
> > a.subs(eps = 1)
>
> > but the response is still 3*epsilon !
>
> This is due to the way Python functions work.
On Jul 7, 11:52 pm, David Sanders wrote:
> On Jul 7, 11:43 pm, "ma...@mendelu.cz" wrote:
>
>
>
> > On 7 čnc, 22:55, David Sanders wrote:
>
> > > Hi,
>
> > > [I am using 'Sage Version 4.4.4, Release Date: 2010-06-23', downloaded
On Jul 7, 11:43 pm, "ma...@mendelu.cz" wrote:
> On 7 čnc, 22:55, David Sanders wrote:
>
>
>
> > Hi,
>
> > [I am using 'Sage Version 4.4.4, Release Date: 2010-06-23', downloaded
> > a couple of days ago as the Ubuntu 10.04 binary package, use
> > [Using 'Sage Version 4.4.4, Release Date: 2010-06-23' on Kubuntu
> > 10.04.]
>
> > The following seems like it must come up a lot, but I have not been
> > able to find an answer (apologies if I missed it somewhere).
>
> > I built a worksheet with several cells in the notebook, and then
> > wa
Hi,
[Using 'Sage Version 4.4.4, Release Date: 2010-06-23' on Kubuntu
10.04]
I have just started using Sage, mainly using the notebook interface,
which on the whole is excellent and impressive!
I started out by trying the new interface "Cantor", which is very
nice, but I found it to be too unstab
Hi,
[Using 'Sage Version 4.4.4, Release Date: 2010-06-23' on Kubuntu
10.04.]
The following seems like it must come up a lot, but I have not been
able to find an answer (apologies if I missed it somewhere).
I built a worksheet with several cells in the notebook, and then
wanted to try to run it o
Hi,
[I am using 'Sage Version 4.4.4, Release Date: 2010-06-23', downloaded
a couple of days ago as the Ubuntu 10.04 binary package, used in
Kubuntu 10.04.]
I am just starting out with Sage, and I am very impressed over all.
But after using it pretty intensively for 2 days, I find that I have a
co
Hi,
I have finally managed to try out Sage seriously after a long time
wanting to (and with intermediate-level Python experience). In general
it's really rather amazing, thanks to all involved!
I have come across what -- to me -- seems at least incongruous, when
substituting variables.
I am using
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