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  1. In mathematics, a set is a collection of different things; these things are called elements or members of the set and are typically mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets. A set may have a finite number of elements or be an infinite set. There is a unique set with no elements, called the empty set; a set with a single element is a singleton. Sets ar… See more

    Definition and notation

    Mathematical texts commonly denote sets by capital letters in italic, such as A, B, C. A set may also be called a … See more

    Membership

    If B is a set and x is an element of B, this is written in shorthand as x ∈ B, which can also be read as "x belongs to B", or "x is in B". The statement "y is not an element of B" is written as y ∉ B, which can also be read as "y is not … See more

    The empty set

    The empty set (or null set) is the unique set that has no members. It is denoted ∅, , { }, ϕ, or ϕ. See more

    Singleton sets

    A singleton set is a set with exactly one element; such a set may also be called a unit set. Any such set can be written as {x}, where x is the element. The set {x} and the element x mean different things; Halmos draws the a… See more

    Subsets

    If every element of set A is also in B, then A is described as being a subset of B, or contained in B, written A ⊆ B, or B ⊇ A. The latter notation may be read B contains A, B includes A, or B is a superset of A. The … See more

    Euler and Venn diagrams

    An Euler diagram is a graphical representation of a collection of sets; each set is depicted as a planar region enclosed by a loop, with its elements inside. If A is a subset of B, then the region representing A is complete… See more

    Special sets of numbers in mathematics

    There are sets of such mathematical importance, to which mathematicians refer so frequently, that they have acquired special names and notational conventions to identify them.
    Many of the… See more

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  1. Characteristics of a set include12345:
    • A set is a well-defined collection of objects.
    • Sets are named and represented using capital letters.
    • The elements that a set comprises can be any kind of thing: people, letters of the alphabet, numbers, shapes, variables, etc.
    • The order in which the elements appear in a set does not affect its definition.
    • Sets can have a finite or infinite number of elements.
    • Set elements are unique and duplicate elements are not allowed.
    • A set itself may be modified, but the elements contained in the set must be of an immutable type.
    Learn more:
    In mathematics, a set is defined as a well-defined collection of objects. Sets are named and represented using capital letters. In the set theory, the elements that a set comprises can be any kind of thing: people, letters of the alphabet, numbers, shapes, variables, etc.
    www.cuemath.com/algebra/sets/
    Sets are represented as a collection of well-defined objects or elements and it does not change from person to person. A set is represented by a capital letter. The number of elements in the finite set is known as the cardinal number of a set.

    Characteristics

    • Sets are defined by their elements: A set is defined by the objects that belong to it, known as elements. ...
    www.caracteristicass.de/en/sets/
    Sets are unordered. Set elements are unique. Duplicate elements are not allowed. A set itself may be modified, but the elements contained in the set must be of an immutable type.
    realpython.com/python-sets/

    What is a Set?

    • A set is represented by a capital letter, for instance, A = {...} .
    • Elements are represented using a curly bracket in a set such as A = {1, 2, 3, 4, 5} .
    collegedunia.com/exams/what-is-a-set-mathematic…
     
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    In Maths, sets are a collection of well-defined objects or elements. A set is represented by a capital letter symbol and the number of elements in the finite set is represented as the …

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