For an integer represented in a fixed-radix number system, a number formed by replacing each digit d in the integer by its complement, i.e. by
where
R denotes the radix of the system. For example, in the decimal system the
nine’s complement of 0372 is 9627; in the binary system the
one’s complement of 1100 is 0011.
See also complement number system,
radix complement.