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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 ...
For example, ⠌ dots 3-4 represents / in Braille ASCII, and this is the Braille slash, but ⠿ dots 1-2-3-4-5-6 represents =, and this is not the equals sign in Braille. Braille ASCII more closely corresponds to the Nemeth Braille Code for mathematics than it does to the English Literary Braille Code, as the Nemeth Braille code is what it was ...
According to BANA, which adopted UEB in 2012, the official braille codes for the USA will be UEB and Nemeth Braille (as well as Music Braille for vocals and instrumentals plus IPA Braille for phonetic linguistics), [23] despite the use of contradictory representation of numerals and arithmetical symbols in the UEB and Nemeth encodings. Thus ...
The braille package for LaTeX (and several printed publications such as the printed manual for the new international braille music code) show unpunched dots as very small dots (much smaller than the filled-in dots) rather than circles, and this tends to print better. Some braille fonts do not indicate unpunched dots at all.
As of 2012, UEB was officially adopted by BANA as the standard for literary braille, but Nemeth Code was also fully retained as an optional official coding system. Work on NUBS may continue, or it might be merged into a future rules-update to the official Nemeth Code (the most recent official rules-update to Nemeth Code was in 2013).
The Braille pattern dots-3456 ( ⠼) is a 6-dot braille cell with the top right, middle right, and both bottom dots raised, or an 8-dot braille cell with the top right, upper-middle right, and both lower-middle dots raised. It is represented by the Unicode code point U+283c, and in Braille ASCII with a number sign: #.
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The Braille pattern dots-45 ( ⠘) is a 6-dot braille cell with the top and middle right dots raised, or an 8-dot braille cell with the top and upper middle right dots raised. It is represented by the Unicode code point U+2818, and in Braille ASCII with a caret: ^.