It seems like it would be relatively easy to implement a Sage class
for real intervals that represents finite unions of open, closed, half
open, and unbounded intervals and implements union() and
intersection() methods.
I did it. I attach my piece of code. This is only python, but it is
going
I have tried installing this package without success on a source build
of sage 4.6  (I can forward the full build log to the maintainer if
required  and it seems maybe some opengl libraries or some linkage
might be missing  the only package to fail is vtk itsellf  relevant
extract of log
On Dec 9, 9:57 pm, Dan Drake dr...@kaist.edu wrote:
*facepalm* That was stupid  matrix_plot() already accepts numpy arrays
of shape (x,y,3) and plots them as a color image exactly the way I want.
No need to mess around with pylab.imshow().
Sorry for the noise.
Actually, your message
seb wrote:
I have tried installing this package without success on a source build
of sage 4.6  (I can forward the full build log to the maintainer if
required  and it seems maybe some opengl libraries or some linkage
might be missing  the only package to fail is vtk itsellf  relevant
On Fri, 10 Dec 2010 at 10:09AM 0800, jvkersch wrote:
Actually, your message gave me some good ideas of how to visualize the
SVD decomposition in my linear algebra class, so not noise at all :)
I'll publish my worksheet when I'm finished and post back here.
Dan

 Dan Drake

Hi,
Below is a passage in the Reference manual on the coercion model:
If R is the base of S (as in the first example), simply implement
_rmul_ and/or _lmul_ on the Elements of S. In this case r * s gets
handled as s._rmul_(r) and s * r as s._lmul_(r). The argument to
_rmul_ and _lmul_ are