On Tuesday, June 21, 2011 9:17:14 AM UTC-7, pong wrote:
>
> Thanks. Yours command work :)
>
> I used
>
> from sage.misc.latex import latex_extra_preamble
> latex_extra_preamble()
> '\\newcommand{\\floor}[1]{ \\lfloor #1 \\rfloor}'
>
Do you mean you executed this in a Sage cell? That would explain it. The
function 'latex_extra_preamble' doesn't set the preamble, it tells you what
it is, so if you execute
from sage.misc.latex import latex_extra_preamble
latex_extra_preamble()
then you'll get a long string containing the preamble. (The standard
documentation says that the function "Return the string containing the
user-configured preamble".) If you use your three lines, then it evaluates
each of them, but only prints the return value of the last one, which is the
string '\\newcommand...'. It doesn't modify the preamble.
--
John
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