Marburg Notation

A Braille-based mathematical notation system developed at the Deutsche Blindenstudienanstalt (German Institute for the Blind) in Marburg, Germany, and widely used in German-speaking countries for reading and writing mathematics. Marburg notation is a 6-dot Braille code optimized for context sensitivity, allowing many expressions to be represented compactly. It uses a distinctive "projective" technique to represent two-dimensional mathematical structures like fractions, superscripts, and subscripts in a linear Braille format. Marburg notation is the European counterpart to Nemeth Braille Code used in English-speaking countries.