In combinatorics, a ( v , k , λ ) {\displaystyle (v,k,\lambda )} difference set is a subset D {\displaystyle D} of size k {\displaystyle k} of a group...

termed the set difference of B and A, written B ∖ A , {\displaystyle B\setminus A,} is the set of elements in B that are not in A. If A is a set, then the...

symmetric difference of two sets, also known as the disjunctive union and set sum, is the set of elements which are in either of the sets, but not in...

Look up difference or différence in Wiktionary, the free dictionary. Difference commonly refers to: Difference (philosophy), the set of properties by which...

In mathematics, a square-difference-free set is a set of natural numbers, no two of which differ by a square number. Hillel Furstenberg and András Sárközy...

4} is the set {2, 3}. Set difference of U and A, denoted U ∖ A, is the set of all members of U that are not members of A. The set difference {1, 2, 3}...

Difference in differences (DID or DD) is a statistical technique used in econometrics and quantitative research in the social sciences that attempts to...

the difference is a type of puzzle where players must find a set number of differences between two otherwise similar images. Spot the difference games...

In color science, color difference or color distance is the separation between two colors. This metric allows quantified examination of a notion that formerly...

A finite difference is a mathematical expression of the form f(x + b) − f(x + a). Finite differences (or the associated difference quotients) are often...

Voltage, also known as (electrical) potential difference, electric pressure, or electric tension, is the difference in electric potential between two points...

The name difference engine is derived from the method of finite differences, a way to interpolate or tabulate functions by using a small set of polynomial...

{\displaystyle A} . The set of difference sets of natural numbers is an analytic set, and is complete for analytic sets. Analytic sets are also called Σ 1...

card number but have various differences; cards are numbered out of 216, but there are more distinct cards than this in the set. ^XXXVII : Also known as "Introductory...

Difference is a key concept of philosophy, denoting the process or set of properties by which one entity is distinguished from another within a relational...

order n. A set of n − 1 MOLS of order n can be used to construct a projective plane of order n (and conversely). A (v, k, λ) difference set is a subset...

information theory, data differencing or differential compression is producing a technical description of the difference between two sets of data – a source...

field of real analysis, the Steinhaus theorem states that the difference set of a set of positive measure contains an open neighbourhood of zero. It...

test of the underlying theory. When the null hypothesis defaults to "no difference" or "no effect", a more precise experiment is a less severe test of the...

set theory, a branch of mathematics, the difference hierarchy over a pointclass is a hierarchy of larger pointclasses generated by taking differences...

{S}}} ⁠ has two elements. The set difference of two sets ⁠ A {\displaystyle A} ⁠ and ⁠ B {\displaystyle B} ⁠, is a set, denoted ⁠ A ∖ B {\displaystyle...

finite-difference methods (FDM) are a class of numerical techniques for solving differential equations by approximating derivatives with finite differences....

space, a set X is a Meyer set if it is relatively dense and its difference set X − X is uniformly discrete. Equivalently, X is a Meyer set if both X...

a set of arguments where two or more functions have equal values. An equaliser is the solution set of an equation. In certain contexts, a difference kernel...

In finance, a contract for difference (CFD) is a financial agreement between two parties, commonly referred to as the "buyer" and the "seller." The contract...

Intuitively, a difference variety over a difference field K {\displaystyle K} is the set of solutions of a system of algebraic difference equations over...

Open set Clopen set Fσ set Gδ set Compact set Relatively compact set Regular open set, regular closed set Connected set Perfect set Meagre set Nowhere...

{Z} ,n=2k\}} The set of all even integers, expressed in set-builder notation. In mathematics and more specifically in set theory, set-builder notation...

The Difference Engine (1990) is an alternative history novel by William Gibson and Bruce Sterling.[better source needed] It has been described as an early...

"A World of Difference" is the twenty-third episode of the American television anthology series The Twilight Zone. You're looking at a tableau of reality...