Unary may refer to: *

Unary numeral system The unary numeral system is the simplest numeral system to represent natural numbers: to represent a number ''N'', a symbol representing 1 is repeated ''N'' times. In the unary system, the number 0 (zero) is represented by the empty string, tha ...

, the simplest numeral system to represent natural numbers *

Unary function In mathematics, a unary function is a function that takes one argument. A unary operator belongs to a subset of unary functions, in that its codomain coincides with its domain. In contrast, a unary function's domain need not coincide with its r ...

, a function that takes one argument; in computer science, a unary operator is a subset of unary function *

Unary operation In mathematics, a unary operation is an operation with only one operand, i.e. a single input. This is in contrast to ''binary operations'', which use two operands. An example is any function , where is a set; the function is a unary operation ...

, a kind of mathematical operator that has only one operand *

Unary relation In mathematics, a finitary relation over a sequence of sets is a subset of the Cartesian product ; that is, it is a set of ''n''-tuples , each being a sequence of elements ''x'i'' in the corresponding ''X'i''. Typically, the relation descri ...

, a mathematical relation that has one argument *

Unary coding Unary coding, or the unary numeral system, is an entropy encoding that represents a natural number, ''n'', with ''n'' ones followed by a zero (if the term ''natural number'' is understood as ''non-negative integer'') or with ''n'' − ...

, an entropy encoding that represents a number ''n'' with n − 1 ones followed by a zero

See also