TITLE: Math for blind people...
QUESTION [20 upvotes]: What happens if some blind person want to study math? Is there some "braille alphabet" for mathematical symbols? Are there math books, at least for undergraduate students, written for blind people?

REPLY [2 votes]: There exists a certain variation-or rather "enrichment"-of the Braille Alphabet, named Nemeth Braille, after its' creator, Abraham Nemeth, which is also using the standard six-dot Braille cells to create mathematical symbols.
I am not sure on whether it is exhaustive-that is, if all mathmematical expressions can be written by making use of its symbols-but I am pretty certain that is sufficient for a full undergraduate course. 
This pdf file contains a full version-I believe it is the latest version-of the Nemeth Code.
As an example, of typical mathematical statements written in Nemeth Braille check this (taken from the afformentioned file):

 
In general, learning by audio lectures can also help, while the presence of many on-line material, such as in various youtube sources, even though they are not specifically made for the blind or visually impaired people, can be a great educational asset. 
The Soviet mathematician Lev Pontryagin, mentioned in the comments, is a fine example of someone who studied and contributed greatly to mathematics while being blind since he was 14. Also, one can mention, with the danger of sounding..sacrilegeous, the example of Euler, whose productivity was not in the least affected after losing his eyesight-actually one could argue that it was increased.