This started out in grading notebooks, but does not really belong
there.
-----
I am happy to report the functionality to modify
the latex header for notebook output is already present in sage:
sage: import sage.misc.latex as l
sage: l.LATEX_HEADER+='\\def \\pgfsysdriver {pgfsys-dvips.def}\n
\\usepackage{tikz\n
\\usetikzlibrary
{shapes,fit,positioning}\n'
sage: print 'LATEX_HEADER\n', l.LATEX_HEADER
does work as expected.
Next, a cell with the following text:
%latex
\begin{tikzpicture}[>=stealth]
\draw[red,rotate=10,scale=.5,ultra thick] (0.375,0) ellipse
(1.125 and 2.0945);
\end{tikzpicture}
oh?
will produce an ellipse with the string "oh?" to the left.
Without "oh?", however, I get not output at all???
-puzzled
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