I appreciate the efforts that are under way to make sagenb.org more usable en
masse. I'll patiently wait for the improvements to take effect. In my
ignorance, let me pose a related question. It seems to me the published
notebooks are far different entities than those that are "active". Am I
I've spent the last couple of hours frustrated at trying to log in and use
notebooks at sagenb.org. I was attempting to do this while teaching a class,
and had little to no success between 10:30 and 12:20 EST (U.S.). I had this
same experience about a month ago when teaching a different class
Could this also be the source of my problem? Code like
var('x y z t')
p1 = parametric_plot3d((x,0,z), (x,-1.2,1.2), (z,-1.2,1.2),
color='green', opacity=.65)
p2 = parametric_plot3d((x,2-x,z), (x,-1.2,1.2), (z,-1.2,1.2),
color='green', opacity=.65)
p3 = parametric_plot3d((sin(t), y, cos(t)),
Can someone point me to examples/documentation on doing double
integrals numerically? That is, say you have to calculate a double
integral with integrand f(x,y) for which no closed-form antiderivative
(neither in x nor y) exists. Assume my xy-region of integration is
rectangular. Is th
I'm getting this message probably close to half the times I try to log
into sagenb.org. It is not browser-specific. On my Mac, running OS
10.5.8, it seems it happens in Safari, Firefox, Camino and Chrome. I
remove all cookies, set things to accept all cookies, etc. (haven't
tried shift
Wow! 28+ hours and no one has addressed this question. Do I need to
supply more information? Have I just simply asked a really dumb
question?
Thomas L. Scofield
Associate Professor
Department of Mathematics and Statistics
Calvin Co
I should have said a couple more things. First, when integrand
evaluates to something other than the zero function (or, at least, to
a non-constant function), the original code
var('x,y,t')
F=vector([x^2,x*y])
r=vector([cos(t), sin(t)])
tstart=0
tend=2*pi
integrand = F(x=
I borrowed/adapted the following code for carrying out a line integral
from a published notebook
var('x,y,t')
F=vector([x^2,x*y])
r=vector([cos(t), sin(t)])
tstart=0
tend=2*pi
integrand = F(x=r[0], y=r[1])*diff(r,t)
As one may observe, integrand is identically 0. The idea
To what does "#7872" refer? And is that a reply to O. Lazo, or to my
post?
On Jan 26, 2010, at 2:56 AM, William Cauchois wrote:
Check out #7872, Jason!
On Jan 23, 11:59 am, Jason Grout wrote:
Oscar Lazo wrote:
On 22 ene, 12:56, Thomas Scofield wrote:
I have made an i
lity? I guess
the basic question is whether this kind of real-time viewing is
possible in the (near?) future, and what are the steps for getting
there.
Thomas
On Jan 22, 2010, at 9:18 PM, Jason Grout wrote:
Thomas Scofield wrote:
I have made an interactive notebook for help students underst
I have made an interactive notebook for help students understand the
meaning of spherical coordinates. It is published at
http://www.sagenb.org/home/pub/1400/
The main issue here is the labeling of objects using symbols. I saw a
posting from William Stein at
http://groups.google.com
I am creating notebooks to publish for my students to use in a spring
course. Perhaps not surprisingly, I am interspersing commands, output
of those commands, and explanatory text. The only way I know to
create the latter is to shift-click to open a text cell. I discovered
a few days a
I do not recall having trouble with parametric_plot3d() before today.
I'm still not having trouble except when I try using it to plot a
surface.
I am running Sage through a browser (Firefox) at the website www.sagenb.org
, so I presume it is the latest in programming. A simple command lik
Thank you for addressing this.
On Jan 20, 2010, at 1:00 AM, Jason Grout wrote:
Thomas Scofield wrote:
I am planning to use Sage in a vector calculus course this spring.
I have a plot of two simple vector fields which are everywhere
orthogonal, and wish to have arrows for one field
I am planning to use Sage in a vector calculus course this spring. I
have a plot of two simple vector fields which are everywhere
orthogonal, and wish to have arrows for one field colored differently
than for the other. I cannot, however, find any documentation for a
"color switch", nei
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