Installing and using Emacs, AUCTeX, RefTeX, preview-latex

Typing Latex in Emacs is easier with the help of AUCTeX, RefTeX and preview-latex

1. Installation of AUCTex, RefTex and preview-latex
   
2. Using
3. Most commonly used command:
1. C-c ( ; it is used to label an object.
2. C-c ) ; it is used to reference an object.
   
3. C-c [ RET keyword; it is used to find the reference \cite
   
4. C-c = to explore table of content
   
5. C-c C-p C-d; it is used to turn on preview-latex
6. C-c C-p C-c C-d; it is used to turn off preview-latex