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Set (mathematics) - Wikipedia
In mathematics, a set is a collection of elements. The elements that make up a set can be any kind of mathematical objects: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets. The set with no element is the empty set; a set with a single element is a
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Xem thêmThe concept of a set emerged in mathematics at the end of the 19th century. The German word for set, Menge, was coined by Bernard Bolzano in his work Paradoxes of the Infinite.
Georg Cantor,...
Xem thêmMathematical texts commonly denote sets by capital letters in italic, such as A, B, C. A set may also be called a collection or family, especially when its elements are themselves sets.
Roster notation
Roster or enumeration...
Xem thêmIf 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 or "y is not in B".
For example, with respect...
Xem thêmA 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
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Xem thêmIf 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
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Xem thêmAn Euler diagramis a graphical representation of a collection of sets; each set is depicted as a planar region enclosed by a loop, with its
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Xem thêmThe empty set (or null set) is the unique set that has no members. It is denoted ∅ or or { } or ϕ (or ϕ).
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Xem thêmVăn bản Wikipedia theo giấy phép CC-BY-SAMục này có hữu ích không?Cảm ơn! Cung cấp thêm phản hồi Set theory - Wikipedia
Set theory is the branch of mathematical logic that studies sets, which can be informally described as collections of objects. Although objects of any kind can be collected into a set, set theory, as a branch of mathematics, is mostly concerned with those that are relevant to mathematics as a whole.
The modern study of set theory was initiated by the German mathematicians R…Wikipedia · Nội dung trong CC-BY-SA giấy phépSet - Simple English Wikipedia, the free encyclopedia
Set (mathematics)
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