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  2. Inclusion–exclusion principle - Wikipedia

    en.wikipedia.org/wiki/Inclusionexclusion...

    Inclusion–exclusion illustrated by a Venn diagram for three sets. Generalizing the results of these examples gives the principle of inclusion–exclusion. To find the cardinality of the union of n sets: Include the cardinalities of the sets. Exclude the cardinalities of the pairwise intersections.

  3. Inclusion and exclusion criteria - Wikipedia

    en.wikipedia.org/wiki/Inclusion_and_exclusion...

    Inclusion criteria may include factors such as type and stage of disease, the subject’s previous treatment history, age, sex, race, ethnicity. Exclusion criteria concern properties of the study sample, defining reasons for which patients from the target population are to be excluded from the current study sample. Typical exclusion criteria ...

  4. Euler characteristic - Wikipedia

    en.wikipedia.org/wiki/Euler_characteristic

    if X is a stratified space all of whose strata are even-dimensional, the inclusion–exclusion principle holds if M and N are unions of strata. This applies in particular if M and N are subvarieties of a complex algebraic variety. [8] In general, the inclusion–exclusion principle is false.

  5. Set (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Set_(mathematics)

    The inclusion-exclusion principle for two finite sets states that the size of their union is the sum of the sizes of the sets minus the size of their intersection. The inclusion–exclusion principle is a technique for counting the elements in a union of two finite sets in terms of the sizes of the two sets and their intersection.

  6. Combinatorial principles - Wikipedia

    en.wikipedia.org/wiki/Combinatorial_principles

    The inclusion–exclusion principle relates the size of the union of multiple sets, the size of each set, and the size of each possible intersection of the sets. The smallest example is when there are two sets: the number of elements in the union of A and B is equal to the sum of the number of elements in A and B , minus the number of elements ...

  7. Union (set theory) - Wikipedia

    en.wikipedia.org/wiki/Union_(set_theory)

    Inclusion–exclusion principle – Counting technique in combinatorics; Intersection (set theory) – Set of elements common to all of some sets; Iterated binary operation – Repeated application of an operation to a sequence; List of set identities and relations – Equalities for combinations of sets; Naive set theory – Informal set theories

  8. Assimilation and contrast effects - Wikipedia

    en.wikipedia.org/wiki/Assimilation_and_contrast...

    The inclusion/exclusion model [ edit ] A more specific model to predict assimilation and contrast effects with differences in categorizing information is the inclusion/exclusion model developed 1992 by Norbert Schwarz and Herbert Bless.< [ 7 ] It explains the mechanism through which effects occur. [ 8 ]

  9. Derangement - Wikipedia

    en.wikipedia.org/wiki/Derangement

    Derivation by inclusion–exclusion principle. One may derive a non-recursive formula for the number of derangements of an n-set, as well.