For the set of elements in one set but not another, see Relative complement. For the set of differences of pairs of elements, see Minkowski difference.
In combinatorics, a difference set is a subset of size of a group of order such that every non-identity element of can be expressed as a product of elements of in exactly ways. A difference set is said to be cyclic, abelian, non-abelian, etc., if the group has the corresponding property. A difference set with is sometimes called planar or simple.[1] If is an abelian group written in additive notation, the defining condition is that every non-zero element of can be written as a difference of elements of in exactly ways. The term "difference set" arises in this way.
In combinatorics, a ( v , k , λ ) {\displaystyle (v,k,\lambda )} differenceset is a subset D {\displaystyle D} of size k {\displaystyle k} of a group...
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...
Difference in differences (DID or DD) is a statistical technique used in econometrics and quantitative research in the social sciences that attempts to...
Look up difference or différence in Wiktionary, the free dictionary. Difference commonly refers to: Difference (philosophy), the set of properties by which...
Voltage, also known as (electrical) potential difference, electric pressure, or electric tension is the difference in electric potential between two points...
4} is the set {2, 3}. Setdifference of U and A, denoted U \ A, is the set of all members of U that are not members of A. The setdifference {1, 2, 3}...
The name difference engine is derived from the method of divided differences, a way to interpolate or tabulate functions by using a small set of polynomial...
finite difference is a mathematical expression of the form f (x + b) − f (x + a). If a finite difference is divided by b − a, one gets a difference quotient...
In color science, color difference or color distance is the separation between two colors. This metric allows quantified examination of a notion that formerly...
In finance, a contract for difference (CFD) is a legally binding agreement that creates, defines, and governs mutual rights and obligations between two...
The absolute difference of two real numbers x {\displaystyle x} and y {\displaystyle y} is given by | x − y | {\displaystyle |x-y|} , the absolute value...
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...
polynomial equations, System of differential equations, or a System of difference equations Simultaneous equations model, a statistical model in the form...
{\displaystyle A} . The set of differencesets of natural numbers is an analytic set, and is complete for analytic sets. Analytic sets are also called Σ 1...
finite-difference methods (FDM) are a class of numerical techniques for solving differential equations by approximating derivatives with finite differences....
chiefly set in 1855. The fictional historical background diverges from our timeline around 1824, at which point Charles Babbage completes his Difference Engine...
Symmetric Difference of Fuzzy Sets, in: Fuzzy Sets Theory and Applications 2014, Liptovský Ján, Slovak Republic Goguen, Joseph A., 196, "L-fuzzy sets". Journal...
Intersection of two sets A ∩ B {\displaystyle ~A\cap B} Union of two sets A ∪ B {\displaystyle ~A\cup B} Symmetric difference of two sets A △ B {\displaystyle...
Difference and Repetition (French: Différence et répétition) is a 1968 book by French philosopher Gilles Deleuze. Originally published in France, it was...
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) differenceset is a subset...
definitions vary and care is needed respecting the difference with recursively enumerable. A set S {\displaystyle S} is countable if: Its cardinality...
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