Dear Physics Forum advisers and friends, I am a college junior with major in the mathematics and an aspiring mathematician in the theoretical computer science. Recently, I got very interested in the LaTeX as it seems that it is widely used in the mathematics (research papers, homework, etc.), so I am very eager to learn it. Could you inform me the source or link where I can download the LaTeX program, and the learning source where I can learn how to use it? Also how efficient is LaTeX compared to traditional pen/pencil in the note-taking. I have been seeing a growing number of students that use the LaTex and laptop to take notes from the lectures and books, rather than using the notebook and pencil. Could you share you experience?