Hi Ramus, yes, the reason is that, differently from $...$ and \(...\), an equation environment produces a *numbered* equation to which you can add a label and reference the equation by (label) name in other parts of the text. This is not possibly with unnumbered math environments ($$, ...). Regards, Fede On Fri, Jun 6, 2014 at 5:00 PM, Rasmus wrote: > Federico Beffa writes: > > > Hi, > > > > I would like to have a mathematical equation typeset in latex and > > automatically generated by sympy, embedded in an equation environment: > > > > #+NAME: mass-energy > > #+BEGIN_SRC python :results raw :exports results :wrap EQUATION > > import sympy as sp > > E, m, c = sp.symbols('E, m, c', real=True, positive=True) > > E = m*c**2 > > return sp.latex(E) > > #+END_SRC > > > > > > #+NAME: eq:1 > > #+RESULTS: mass-energy > > #+BEGIN_EQUATION > > c^{2} m > > #+END_EQUATION > > > > The problem I'm facing is that despite the fact that the equation is > > already in a mathematical mode latex environment, it still gets sub- and > > superscripts surrounded by a $ sign. Here is the generated latex snippet: > > > > \begin{equation} > > \label{eq:1} > > c$^{\text{2}}$ m > > \end{equation} > > > > Is there a way to teach org-mode not to insert $ signs in equation > > environments? > > Is there a reason you are not using a mode argument like this: > > #+NAME: mass-energy > #+BEGIN_SRC python :results raw :exports results :post > import sympy as sp > E, m, c = sp.symbols('E, m, c', real=True, positive=True) > E = m*c**2 > return sp.latex(E, mode="inline") > #+END_SRC > > #+RESULTS: mass-energy > $c^{2} m$ > > > Alternatively, if you need to combine stuff you could use the post > argument > > #+name: wrapper > #+BEGIN_SRC emacs-lisp :var x="" > (format "\\(%s\\)" x) > #+END_SRC > > #+NAME: mass-energy > #+BEGIN_SRC python :results raw :exports results :post > wrapper(x=*this*) > import sympy as sp > E, m, c = sp.symbols('E, m, c', real=True, positive=True) > E = m*c**2 > return sp.latex(E) > #+END_SRC > > #+RESULTS: mass-energy > \(c^{2} m\) > > —Rasmus > > -- > El Rey ha muerto. ¡Larga vida al Rey! > > >