set of numbers
81Ideal (set theory) — In the mathematical field of set theory, an ideal is a collection of sets that are considered to be small or negligible . Every subset of an element of the ideal must also be in the ideal (this codifies the idea that an ideal is a notion of… …
82The Numbers Gang — In Pollsmoor Prison, Cape Town Years active 1911–present Territory All prisons in South Africa Ethnicity Primarily Cape Coloureds and Black Africans Criminal activities Extortion, Rape, Inmate Prostitution, Murder …
83Stirling numbers of the second kind — In mathematics, Stirling numbers of the second kind, together with Stirling numbers of the first kind, are one of the two types of Stirling numbers. They commonly occur in the study of combinatorics, where they count the number of permutations.… …
84Morse–Kelley set theory — In the foundation of mathematics, Morse–Kelley set theory (MK) or Kelley–Morse set theory (KM) is a first order axiomatic set theory that is closely related to von Neumann–Bernays–Gödel set theory (NBG). While von Neumann–Bernays–Gödel set theory …
85Completeness of the real numbers — Intuitively, completeness implies that there are not any “gaps” (in Dedekind s terminology) or “missing points” in the real number line. This contrasts with the rational numbers, whose corresponding number line has a “gap” at each irrational… …
86Complement (set theory) — In set theory, a complement of a set A refers to things not in (that is, things outside of), A. The relative complement of A with respect to a set B, is the set of elements in B but not in A. When all sets under consideration are considered to be …
87Harmonious set — In mathematics, a harmonious set is a subset of a locally compact abelian group on which every weak character may be uniformly approximated by strong characters. Equivalently, a suitably defined dual set is relatively dense in the Pontryagin dual …
88Book of Numbers — Hebrew Bible Tanakh …
89Mandelbrot set — Initial image of a Mandelbrot set zoom sequence with a continuously coloured environment …
90Lucas–Lehmer test for Mersenne numbers — This article is about the Lucas–Lehmer test (LLT), that only applies to Mersenne numbers. There is also a Lucas Lehmer Riesel test for numbers of the form N=k 2^n 1, with 2^n > k, based on the LLT: see Lucas Lehmer Riesel test. There is also a… …
