(mathematics) rectangular number

(mathematics) A number which is the product of two consecutive integers

(archaic) second-person singular simple present form of number

plural of clique number

(graph theory) The number of vertices in a maximum clique of a given graph.

(set theory) Any of a sequence of numbers used to represent the cardinality of infinite sets, denoted by the Hebrew letter aleph.

(number theory) A natural number that is abundant but not semiperfect; one for which the sum of the proper divisors (including 1 but not itself) is greater than the number, but no subset of those divisors sums to the number itself.

plural of weird number

plural of numero sign

A sign that serves as an abbreviation of the word number. It comprises a capital letter N with a lowercase letter o, the latter typically superscript and sometimes underlined. Examples of numero signs include No., No, №, and Nº.