plural of Catalan number

In combinatorial mathematics, any of a sequence of natural numbers that occur in various counting problems, often involving recursively defined objects; the nᵗʰ Catalan number is equal to (2n choose n) over (n+1).

plural of abbreviated number

A number which has had significant figures omitted beyond a certain point to make calculations easier; rounded number.

(arithmetic) Any of the symbols 〇 (or 零), 一, 二, 三, 四, 五, 六, 七, 八, 九, 十, 百, 千, 萬 / 万, 億 / 亿, etc. used to represent numbers in Chinese-speaking countries/areas, Japan, at some stage in Korea and Vietnam.

(mathematics) The number of distinct meanders of a given order.

plural of meandric number

(telecommunications) A number denoting the electrical load of a telephone ringer circuit on a particular line.

An extremely large number that is an upper bound on the solution to a certain problem in Ramsey theory.

plural of distributive number