Reciprocal

is a monadic scalar function which gives the multiplicative inverse of a real or complex number. Reciprocal shares the glyph  with the dyadic arithmetic function Divide.

Properties
Reciprocal of any real or complex number is equal to 1 divided by that number. Therefore the monadic  can be seen as dyadic   with default left argument of 1. This applies even to the reciprocal of 0;  and   show identical behavior for both   (raising DOMAIN ERROR) and   (returning 0).

For any non-zero real or complex numbers, the signum of reciprocal is equal to the conjugate of signum, and the magnitude of reciprocal is equal to the reciprocal of magnitude.

Documentation

 * Dyalog
 * J Dictionary, NuVoc