Golam Mortuza Hossain wrote:
> Hi all,
>
> I am trying to enhance the support for latex-formatting
> of "SymbolicFunctionEvaluation" in Sage. In particular,
> when their names match with Greek letters then Sage
> should use formatting similar to the formatting of
> "SymbolicVariable".
>
> In Physics, we often use "psi(x)" to denote a wave-function
> like
> ---
> psi(x) = function('psi',x)
> ---
>
> It will make Sage output more intuitive if they are
> formatted as Greek letters.
>
> I have already got it working after adding only few lines
> of codes. However, I am facing couple of issues:
>
> (1) While formatting integral expression, such as
>
> integrate(phi(x)*psi(x),x)
>
> Sage seems to bypass the _latex_ representation for
> the class "SymbolicFunctionEvaluation" (of phi(x), psi(x)).
>
> Can anyone give me some hints: where are the latex
> representations for "integrate", "diff", .... are defined?
> I mean in which file?
>
Can you post your patch that makes the functions typeset as greek
letters? I was trying to track this down, but the following current
behavior inhibits that.
sage: latex(function('alpha', x))
{\it alpha}\left(x\right)
sage: latex(function('phi', x))
{\it phi}\left(x\right)
sage: latex(function('psi', x))
{\it psi}\left(x\right)
As a guess, we might be calling out to maxima to latex the integral or
derivative, so that might explain where the problem lies. The code
would probably be in calculus/, maybe in calculus/calculus.py.
I believe http://trac.sagemath.org/sage_trac/ticket/4202 is relevant here.
> (2) In the list "common_varnames" (in sage/misc/latex.py) two
> letters "Phi" and "phi" are missing. So LaTex formatting
> for them doesn't work like other Greek letters (even when they
> are defined as "SymbolicVariable").
>
Yep, I ran into (2) a while back when doing spherical coordinates. Do
you already have a patch to add them?
Thanks,
Jason
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