(use-package auctex
     :ensure t
     :defer t
     :hook
     (TeX-mode . TeX-PDF-mode)
     (TeX-mode . company-mode)
     :init
     (setq reftex-plug-into-AUCTeX t)
     (setq TeX-parse-self t)
     (setq-default TeX-master nil)

     (setq TeX-open-quote  "<<")
     (setq TeX-close-quote ">>")
     (setq TeX-electric-sub-and-superscript t)
     (setq font-latex-fontify-script nil)
     (setq TeX-show-compilation nil)

     (setq preview-scale-function 1.5)
     (setq preview-gs-options
      '("-q" "-dNOSAFER" "-dNOPAUSE" "-DNOPLATFONTS"
        "-dPrinted" "-dTextAlphaBits=4" "-dGraphicsAlphaBits=4"))

     (setq reftex-label-alist '(AMSTeX)))

   (use-package company-auctex
     :ensure t
     :init
     (company-auctex-init))

   (use-package company-math
     :ensure t
     :init
     (add-to-list 'company-backends 'company-math))

   (use-package company-reftex
     :ensure t
     :init
     (add-to-list 'company-backends 'company-reftex-citations)
     (add-to-list 'company-backends 'company-reftex-labels))