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  2. Intersection (set theory) - Wikipedia

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

    Intersections of the unaccented modern Greek, Latin, and Cyrillic scripts, considering only the shapes of the letters and ignoring their pronunciation Example of an intersection with sets The intersection of two sets A {\displaystyle A} and B , {\displaystyle B,} denoted by A ∩ B {\displaystyle A\cap B} , [ 3 ] is the set of all objects that ...

  3. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  4. LabelMe - Wikipedia

    en.wikipedia.org/wiki/LabelMe

    If the image is not completely labeled, the user can use the mouse to draw a polygon containing an object in the image. For example, in the adjacent image, if a person was standing in front of the building, the user could click on a point on the border of the person, and continue clicking along the outside edge until returning to the starting ...

  5. Jaccard index - Wikipedia

    en.wikipedia.org/wiki/Jaccard_index

    For example, vectors of demographic variables stored in dummy variables, such as gender, would be better compared with the SMC than with the Jaccard index since the impact of gender on similarity should be equal, independently of whether male is defined as a 0 and female as a 1 or the other way around. However, when we have symmetric dummy ...

  6. Saturated set - Wikipedia

    en.wikipedia.org/wiki/Saturated_set

    For every , the intersection () is equal to the empty set or to (). Related to computability theory , this notion can be extended to programs. Here, considering a subset A ⊆ N {\displaystyle A\subseteq \mathbb {N} } , this can be considered saturated (or extensional ) if ∀ m , n ∈ N , m ∈ A , ∨ ϕ m = ϕ n ⇒ n ∈ A {\displaystyle ...

  7. List of set identities and relations - Wikipedia

    en.wikipedia.org/wiki/List_of_set_identities_and...

    The intersection is the meet/infimum of and with respect to because: if L ∩ R ⊆ L {\displaystyle L\cap R\subseteq L} and L ∩ R ⊆ R , {\displaystyle L\cap R\subseteq R,} and if Z {\displaystyle Z} is a set such that Z ⊆ L {\displaystyle Z\subseteq L} and Z ⊆ R {\displaystyle Z\subseteq R} then Z ⊆ L ∩ R . {\displaystyle Z ...

  8. Bloom filter - Wikipedia

    en.wikipedia.org/wiki/Bloom_filter

    Bloom filters are a way of compactly representing a set of items. It is common to try to compute the size of the intersection or union between two sets. Bloom filters can be used to approximate the size of the intersection and union of two sets. For two Bloom filters of length m, their counts, respectively can be estimated as

  9. Union (set theory) - Wikipedia

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

    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; Symmetric difference – Elements in exactly one of two sets