plural of real number

(complex analysis) A number of the form a + bi, where a and b are real numbers and i denotes the imaginary unit

(mathematics) The smallest set containing all limits of convergent sequences of rational numbers.

(mathematics) The set of numbers that can be expressed as a ratio of integers, often denoted with the bold letter Q, or the blackboard bold letter ℚ.

Used other than figuratively or idiomatically: see random, number. / A number allotted randomly using suitable generator (electronic machine or as simple "generator" as die).

(number theory) An abundant number.

(number theory) A deficient number.

(number theory) A number that is greater than the sum of all of its divisors except itself.

(number theory) A number that is the sum of all of its divisors except itself.

(mathematics) The limit of a convergent sequence of rational numbers, whether the limit is a rational number such as 2, -5, or 2/7 or whether the limit is an irrational number such as the square root of two or the circumference of the circle whose radius is one.