The phrase "diminished radix complement" is used in computer science and mathematics to describe a numerical representation technique. In this method, the radix (or base) of the number system is decreased by 1, and the complement of the given number with respect to the new radix is taken. This complement is added to the original number to get the result in the new representation. Synonyms for this phrase include "complement of the diminished radix," "radix complement minus one," and "diminished radix complementary number system." These terms all refer to the same mathematical concept and are used interchangeably in academic and technical literature.