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/group/sage-support/browse_thread/thread/fed33b91e4700969/6c1073f9bcc4928d?hl=en&lnk=gst&q=latex+text+in+plot#6c1073f9bcc4928d
which (though directed at the text() command instead of text3d()),
indicated I should be able to use
text3d('$\\rho$', (1,1,1))
(the double backslash was important) to place a desired Greek symbol
in a desired location. That seems not to be working, however.
Instead, the backslash characters seem (sometimes) to wipe out the
first letter, and the rest of "ho" is printed, along with the dollar
signs. Is this a bug?
Thomas L. Scofield
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Associate Professor
Department of Mathematics and Statistics
Calvin College
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