Posted by: Alexandre Borovik | May 14, 2011

## Donald Knuth and his notation for multiplicative inverses

Please help me to find a reference to Donald Knuth‘s suggestion to denote inverses as $x^-$ rather than $x^{-1}$. I remember Knuth commenting somewhere that $^1$ is redundant because  $x^{-1}$ could be easily understood as $(x^-)^1$.