IPython/nbconvert/templates/latex/latex_article.tplx

%===============================================================================
% Cell style
%===============================================================================

% Default to the simple output style
((* if not cell_style is defined *))
    ((* set cell_style = 'notebook_style.tplx' *))
((* endif *))

% Inherit from the specified cell style.
((* extends cell_style *))


%===============================================================================
% Latex Article
%===============================================================================

((* block docclass *))
\documentclass{article}
((* endblock docclass *))