(add-hook 'LaTeX-mode-hook 'outline-minor-mode) ; with AUCTeX LaTeX mode
(add-hook 'latex-mode-hook 'outline-minor-mode) ; with Emacs latex mode
(add-hook 'LaTeX-mode-hook 'outline-minor-mode) ; with AUCTeX LaTeX mode
(add-hook 'latex-mode-hook 'outline-minor-mode) ; with Emacs latex mode