Thank you for your tips.
I use SAGE 4.7
%latex_debug shows that latex complains about \floor is an undefined
control sequence (as if the latex_extra_preamble() has no effect)
! Undefined control sequence.
<recently read> \floor
l.31 $\floor
{y}$
....
What did I miss here?
On Jun 20, 7:06 pm, John H Palmieri <jhpalmier...@gmail.com> wrote:
> On Monday, June 20, 2011 6:30:07 PM UTC-7, pong wrote:
>
> > In notebook, I want to define \floor{x} as \lfloor x \rfloor so I
> > tried
>
> > from sage.misc.latex import latex_extra_preamble
>
> > latex_extra_preamble()
> > '\\newcommand{\\floor}[1]{ \\lfloor #1 \\rfloor}'
>
> > %latex
> > $\floor{x}, \lfloor x \rfloor$
>
> > shows that \floor{x} does not typeset correctly and the system does
> > recognize both \lfloor and \rfloor
>
> It works for me, in Sage versions 4.6.2, 4.7, and 4.7.1.alpha2. What
> version are you using? Try using
>
> %latex_debug
> $\floor{x}, \lfloor x \rfloor$
>
> and see if that tells you anything helpful.
>
> --
> John
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