The Nemeth Braille Code for Mathematics and Science Notation is a Braille code for encoding mathematical and scientific notation linearly using standard six-dot Braille cells for tactile reading by the visually impaired. The code was developed by Abraham Nemeth. The Nemeth Code was first written up in 1952. It was revised in 1956, 1965, and 1972. It is an example of a compact human-readable markup language. Nemeth Braille is one code used to write mathematics in braille. There are many systems in use around the world.
Principles of the Nemeth Code The Nemeth Code Book (1972) opens with the following words:
This Braille Code for Mathematics and Science Notation has been prepared to provide a system of symbols which will allow technical literature to be presented and read in braille. The Code is intended to convey as accurate an impression as is possible to the braille reader of the corresponding printed text, and this is one of its principal features. When the braille reader has a clear conception of the corresponding printed text, the area of communication between himself and his teacher, his colleagues, his associates, and the world at large is greatly broadened. A test of the accuracy with which the Code conveys information from the print to the braille text is to effect a transcription in the reverse direction. The amount of agreement between the original printed text and one transcribed from the braille is a measure of the Code's accuracy. One consequence is that the braille transcriber does not need to know the underlying mathematics. The braille transcriber needs to identify the inkprint symbols and know how to render them in Nemeth Code braille. For example, if the same math symbol might have two different meanings, this would not matter; both instances would be brailled the same. This is in contrast to the International Braille Music Code, where the braille depends on the meaning of the inkprint music. Thus a knowledge of music is required to produce braille music.
Table of Nemeth braille codes
General signs
Number signs
Operators
Parentheses and brackets
Fractions
Other modifiers
Braille indicators
Comparison signs
Geometry
Arrows
Trig functions
Set theory
Misc. signs
Polygons
Triangles
Other signs
Greek letters and Latin letters Greek and Latin letters are based on the assignments of International Greek Braille.
See also Gardner-Salinas braille WIMATS, application software to transcript mathematical and scientific text input into braille script.
References
External links An Introduction to the Nemeth Braille Code for Mathematics PDF of the 1972 Nemeth Braille Code for Mathematics Archived 2015-10-28 at the Wayback Machine latex2nemeth, application software that transcribes LaTeX to Nemeth Braille. Braille files for the Nemeth Braille Code for Mathematics; and other resources about braille transcribing The History of Nemeth Code Braille Mathematical Notations: Different Braille Mathematical Codes from Around the World