Get it on Google Play
New! Download Unionpedia on your Android™ device!
Faster access than browser!

Set (mathematics)

Index Set (mathematics)

In mathematics, a set is a collection of distinct objects, considered as an object in its own right. [1]

91 relations: Abstract algebra, Algebraic number, Algebraic structure, Alternative set theory, Augustus De Morgan, Axiom, Bernard Bolzano, Binary relation, Blackboard bold, Boolean ring, Bracket, Cambridge University Press, Cantor's paradox, Category of sets, Class (set theory), Closure (mathematics), Codomain, Colon (punctuation), Complex number, Countable set, De Morgan's laws, Dense set, Dimension, Domain of a function, Dover Publications, E (mathematical constant), Element (mathematics), Empty set, Euclidean space, Extension (semantics), Extensional and intensional definitions, Family of sets, Field (mathematics), First-order logic, Flag of France, Fraction (mathematics), Fuzzy set, Georg Cantor, Group (mathematics), Harvard University Press, If and only if, Infinite set, Integer, Internal set, Irrational number, Joseph Dauben, Letter case, Line (geometry), Line segment, Mathematical object, ..., Mathematics, Mathematics education, Mereology, Multiset, Naive set theory, Natural number, Number theory, Ordered pair, Partition of a set, Paul Halmos, Pi, Plane (geometry), Prime number, Primitive notion, Principia Mathematica, Quaternion, Rational number, Real number, Ring (mathematics), Rough set, Russell's paradox, Sequence, Set notation, Set theory, Set-builder notation, Singleton (mathematics), Square number, Subset, Surjective function, Symmetric difference, Taxonomy (general), The Paradoxes of the Infinite, Transcendental number, Tuple, Uncountable set, Universal set, Universe (mathematics), Venn diagram, Vertical bar, Well-defined, 0. Expand index (41 more) »

Abstract algebra

In algebra, which is a broad division of mathematics, abstract algebra (occasionally called modern algebra) is the study of algebraic structures.

New!!: Set (mathematics) and Abstract algebra · See more »

Algebraic number

An algebraic number is any complex number (including real numbers) that is a root of a non-zero polynomial (that is, a value which causes the polynomial to equal 0) in one variable with rational coefficients (or equivalently – by clearing denominators – with integer coefficients).

New!!: Set (mathematics) and Algebraic number · See more »

Algebraic structure

In mathematics, and more specifically in abstract algebra, an algebraic structure on a set A (called carrier set or underlying set) is a collection of finitary operations on A; the set A with this structure is also called an algebra.

New!!: Set (mathematics) and Algebraic structure · See more »

Alternative set theory

Generically, an alternative set theory is an alternative mathematical approach to the concept of set.

New!!: Set (mathematics) and Alternative set theory · See more »

Augustus De Morgan

Augustus De Morgan (27 June 1806 – 18 March 1871) was a British mathematician and logician.

New!!: Set (mathematics) and Augustus De Morgan · See more »


An axiom or postulate is a statement that is taken to be true, to serve as a premise or starting point for further reasoning and arguments.

New!!: Set (mathematics) and Axiom · See more »

Bernard Bolzano

Bernard Bolzano (born Bernardus Placidus Johann Nepomuk Bolzano; 5 October 1781 – 18 December 1848) was a Bohemian mathematician, logician, philosopher, theologian and Catholic priest of Italian extraction, also known for his antimilitarist views.

New!!: Set (mathematics) and Bernard Bolzano · See more »

Binary relation

In mathematics, a binary relation on a set A is a set of ordered pairs of elements of A. In other words, it is a subset of the Cartesian product A2.

New!!: Set (mathematics) and Binary relation · See more »

Blackboard bold

Blackboard bold is a typeface style that is often used for certain symbols in mathematical texts, in which certain lines of the symbol (usually vertical or near-vertical lines) are doubled.

New!!: Set (mathematics) and Blackboard bold · See more »

Boolean ring

In mathematics, a Boolean ring R is a ring for which x2.

New!!: Set (mathematics) and Boolean ring · See more »


A bracket is a tall punctuation mark typically used in matched pairs within text, to set apart or interject other text.

New!!: Set (mathematics) and Bracket · See more »

Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

New!!: Set (mathematics) and Cambridge University Press · See more »

Cantor's paradox

In set theory, Cantor's paradox is a statement derivable from the theorem that there is no greatest cardinal number, so that the collection of "infinite sizes" is itself infinite.

New!!: Set (mathematics) and Cantor's paradox · See more »

Category of sets

In the mathematical field of category theory, the category of sets, denoted as Set, is the category whose objects are sets.

New!!: Set (mathematics) and Category of sets · See more »

Class (set theory)

In set theory and its applications throughout mathematics, a class is a collection of sets (or sometimes other mathematical objects) that can be unambiguously defined by a property that all its members share.

New!!: Set (mathematics) and Class (set theory) · See more »

Closure (mathematics)

A set has closure under an operation if performance of that operation on members of the set always produces a member of the same set; in this case we also say that the set is closed under the operation.

New!!: Set (mathematics) and Closure (mathematics) · See more »


In mathematics, the codomain or target set of a function is the set into which all of the output of the function is constrained to fall.

New!!: Set (mathematics) and Codomain · See more »

Colon (punctuation)

The colon is a punctuation mark consisting of two equally sized dots centered on the same vertical line.

New!!: Set (mathematics) and Colon (punctuation) · See more »

Complex number

A complex number is a number that can be expressed in the form, where and are real numbers, and is a solution of the equation.

New!!: Set (mathematics) and Complex number · See more »

Countable set

In mathematics, a countable set is a set with the same cardinality (number of elements) as some subset of the set of natural numbers.

New!!: Set (mathematics) and Countable set · See more »

De Morgan's laws

In propositional logic and boolean algebra, De Morgan's laws are a pair of transformation rules that are both valid rules of inference.

New!!: Set (mathematics) and De Morgan's laws · See more »

Dense set

In topology and related areas of mathematics, a subset A of a topological space X is called dense (in X) if every point x in X either belongs to A or is a limit point of A, that is the closure of A is constituting the whole set X. Informally, for every point in X, the point is either in A or arbitrarily "close" to a member of A — for instance, every real number either is a rational number or has a rational number arbitrarily close to it (see Diophantine approximation).

New!!: Set (mathematics) and Dense set · See more »


In physics and mathematics, the dimension of a mathematical space (or object) is informally defined as the minimum number of coordinates needed to specify any point within it.

New!!: Set (mathematics) and Dimension · See more »

Domain of a function

In mathematics, and more specifically in naive set theory, the domain of definition (or simply the domain) of a function is the set of "input" or argument values for which the function is defined.

New!!: Set (mathematics) and Domain of a function · See more »

Dover Publications

Dover Publications, also known as Dover Books, is an American book publisher founded in 1941 by Hayward Cirker and his wife, Blanche.

New!!: Set (mathematics) and Dover Publications · See more »

E (mathematical constant)

The number is a mathematical constant, approximately equal to 2.71828, which appears in many different settings throughout mathematics.

New!!: Set (mathematics) and E (mathematical constant) · See more »

Element (mathematics)

In mathematics, an element, or member, of a set is any one of the distinct objects that make up that set.

New!!: Set (mathematics) and Element (mathematics) · See more »

Empty set

In mathematics, and more specifically set theory, the empty set or null set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero.

New!!: Set (mathematics) and Empty set · See more »

Euclidean space

In geometry, Euclidean space encompasses the two-dimensional Euclidean plane, the three-dimensional space of Euclidean geometry, and certain other spaces.

New!!: Set (mathematics) and Euclidean space · See more »

Extension (semantics)

In any of several studies that treat the use of signs—for example, in linguistics, logic, mathematics, semantics, and semiotics—the extension of a concept, idea, or sign consists of the things to which it applies, in contrast with its comprehension or intension, which consists very roughly of the ideas, properties, or corresponding signs that are implied or suggested by the concept in question.

New!!: Set (mathematics) and Extension (semantics) · See more »

Extensional and intensional definitions

Extensional and intensional definitions are two key ways in which the object(s) or concept(s) a term refers to can be defined.

New!!: Set (mathematics) and Extensional and intensional definitions · See more »

Family of sets

In set theory and related branches of mathematics, a collection F of subsets of a given set S is called a family of subsets of S, or a family of sets over S. More generally, a collection of any sets whatsoever is called a family of sets.

New!!: Set (mathematics) and Family of sets · See more »

Field (mathematics)

In mathematics, a field is a set on which addition, subtraction, multiplication, and division are defined, and behave as when they are applied to rational and real numbers.

New!!: Set (mathematics) and Field (mathematics) · See more »

First-order logic

First-order logic—also known as first-order predicate calculus and predicate logic—is a collection of formal systems used in mathematics, philosophy, linguistics, and computer science.

New!!: Set (mathematics) and First-order logic · See more »

Flag of France

The flag of France (Drapeau français) is a tricolour flag featuring three vertical bands coloured blue (hoist side), white, and red.

New!!: Set (mathematics) and Flag of France · See more »

Fraction (mathematics)

A fraction (from Latin fractus, "broken") represents a part of a whole or, more generally, any number of equal parts.

New!!: Set (mathematics) and Fraction (mathematics) · See more »

Fuzzy set

In mathematics, fuzzy sets (aka uncertain sets) are somewhat like sets whose elements have degrees of membership.

New!!: Set (mathematics) and Fuzzy set · See more »

Georg Cantor

Georg Ferdinand Ludwig Philipp Cantor (– January 6, 1918) was a German mathematician.

New!!: Set (mathematics) and Georg Cantor · See more »

Group (mathematics)

In mathematics, a group is an algebraic structure consisting of a set of elements equipped with an operation that combines any two elements to form a third element and that satisfies four conditions called the group axioms, namely closure, associativity, identity and invertibility.

New!!: Set (mathematics) and Group (mathematics) · See more »

Harvard University Press

Harvard University Press (HUP) is a publishing house established on January 13, 1913, as a division of Harvard University, and focused on academic publishing.

New!!: Set (mathematics) and Harvard University Press · See more »

If and only if

In logic and related fields such as mathematics and philosophy, if and only if (shortened iff) is a biconditional logical connective between statements.

New!!: Set (mathematics) and If and only if · See more »

Infinite set

In set theory, an infinite set is a set that is not a finite set.

New!!: Set (mathematics) and Infinite set · See more »


An integer (from the Latin ''integer'' meaning "whole")Integer 's first literal meaning in Latin is "untouched", from in ("not") plus tangere ("to touch").

New!!: Set (mathematics) and Integer · See more »

Internal set

In mathematical logic, in particular in model theory and non-standard analysis, an internal set is a set that is a member of a model.

New!!: Set (mathematics) and Internal set · See more »

Irrational number

In mathematics, the irrational numbers are all the real numbers which are not rational numbers, the latter being the numbers constructed from ratios (or fractions) of integers.

New!!: Set (mathematics) and Irrational number · See more »

Joseph Dauben

Joseph Warren Dauben (born 29 December 1944, Santa Monica) is a Herbert H. Lehman Distinguished Professor of History at the Graduate Center of the City University of New York.

New!!: Set (mathematics) and Joseph Dauben · See more »

Letter case

Letter case (or just case) is the distinction between the letters that are in larger upper case (also uppercase, capital letters, capitals, caps, large letters, or more formally majuscule) and smaller lower case (also lowercase, small letters, or more formally minuscule) in the written representation of certain languages.

New!!: Set (mathematics) and Letter case · See more »

Line (geometry)

The notion of line or straight line was introduced by ancient mathematicians to represent straight objects (i.e., having no curvature) with negligible width and depth.

New!!: Set (mathematics) and Line (geometry) · See more »

Line segment

In geometry, a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints.

New!!: Set (mathematics) and Line segment · See more »

Mathematical object

A mathematical object is an abstract object arising in mathematics.

New!!: Set (mathematics) and Mathematical object · See more »


Mathematics (from Greek μάθημα máthēma, "knowledge, study, learning") is the study of such topics as quantity, structure, space, and change.

New!!: Set (mathematics) and Mathematics · See more »

Mathematics education

In contemporary education, mathematics education is the practice of teaching and learning mathematics, along with the associated scholarly research.

New!!: Set (mathematics) and Mathematics education · See more »


In philosophy and mathematical logic, mereology (from the Greek μέρος meros (root: μερε- mere-, "part") and the suffix -logy "study, discussion, science") is the study of parts and the wholes they form.

New!!: Set (mathematics) and Mereology · See more »


In mathematics, a multiset (aka bag or mset) is a modification of the concept of a set that, unlike a set, allows for multiple instances for each of its elements.

New!!: Set (mathematics) and Multiset · See more »

Naive set theory

Naïve set theory is any of several theories of sets used in the discussion of the foundations of mathematics.

New!!: Set (mathematics) and Naive set theory · See more »

Natural number

In mathematics, the natural numbers are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country").

New!!: Set (mathematics) and Natural number · See more »

Number theory

Number theory, or in older usage arithmetic, is a branch of pure mathematics devoted primarily to the study of the integers.

New!!: Set (mathematics) and Number theory · See more »

Ordered pair

In mathematics, an ordered pair (a, b) is a pair of objects.

New!!: Set (mathematics) and Ordered pair · See more »

Partition of a set

In mathematics, a partition of a set is a grouping of the set's elements into non-empty subsets, in such a way that every element is included in one and only one of the subsets.

New!!: Set (mathematics) and Partition of a set · See more »

Paul Halmos

Paul Richard Halmos (Halmos Pál; March 3, 1916 – October 2, 2006) was a Hungarian-Jewish-born American mathematician who made fundamental advances in the areas of mathematical logic, probability theory, statistics, operator theory, ergodic theory, and functional analysis (in particular, Hilbert spaces).

New!!: Set (mathematics) and Paul Halmos · See more »


The number is a mathematical constant.

New!!: Set (mathematics) and Pi · See more »

Plane (geometry)

In mathematics, a plane is a flat, two-dimensional surface that extends infinitely far.

New!!: Set (mathematics) and Plane (geometry) · See more »

Prime number

A prime number (or a prime) is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.

New!!: Set (mathematics) and Prime number · See more »

Primitive notion

In mathematics, logic, and formal systems, a primitive notion is an undefined concept.

New!!: Set (mathematics) and Primitive notion · See more »

Principia Mathematica

The Principia Mathematica (often abbreviated PM) is a three-volume work on the foundations of mathematics written by Alfred North Whitehead and Bertrand Russell and published in 1910, 1912, and 1913.

New!!: Set (mathematics) and Principia Mathematica · See more »


In mathematics, the quaternions are a number system that extends the complex numbers.

New!!: Set (mathematics) and Quaternion · See more »

Rational number

In mathematics, a rational number is any number that can be expressed as the quotient or fraction of two integers, a numerator and a non-zero denominator.

New!!: Set (mathematics) and Rational number · See more »

Real number

In mathematics, a real number is a value of a continuous quantity that can represent a distance along a line.

New!!: Set (mathematics) and Real number · See more »

Ring (mathematics)

In mathematics, a ring is one of the fundamental algebraic structures used in abstract algebra.

New!!: Set (mathematics) and Ring (mathematics) · See more »

Rough set

In computer science, a rough set, first described by Polish computer scientist Zdzisław I. Pawlak, is a formal approximation of a crisp set (i.e., conventional set) in terms of a pair of sets which give the lower and the upper approximation of the original set.

New!!: Set (mathematics) and Rough set · See more »

Russell's paradox

In the foundations of mathematics, Russell's paradox (also known as Russell's antinomy), discovered by Bertrand Russell in 1901, showed that some attempted formalizations of the naïve set theory created by Georg Cantor led to a contradiction.

New!!: Set (mathematics) and Russell's paradox · See more »


In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed.

New!!: Set (mathematics) and Sequence · See more »

Set notation

Sets are fundamental objects in mathematics.

New!!: Set (mathematics) and Set notation · See more »

Set theory

Set theory is a branch of mathematical logic that studies sets, which informally are collections of objects.

New!!: Set (mathematics) and Set theory · See more »

Set-builder notation

In set theory and its applications to logic, mathematics, and computer science, set-builder notation is a mathematical notation for describing a set by enumerating its elements or stating the properties that its members must satisfy.

New!!: Set (mathematics) and Set-builder notation · See more »

Singleton (mathematics)

In mathematics, a singleton, also known as a unit set, is a set with exactly one element.

New!!: Set (mathematics) and Singleton (mathematics) · See more »

Square number

In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself.

New!!: Set (mathematics) and Square number · See more »


In mathematics, a set A is a subset of a set B, or equivalently B is a superset of A, if A is "contained" inside B, that is, all elements of A are also elements of B. A and B may coincide.

New!!: Set (mathematics) and Subset · See more »

Surjective function

In mathematics, a function f from a set X to a set Y is surjective (or onto), or a surjection, if for every element y in the codomain Y of f there is at least one element x in the domain X of f such that f(x).

New!!: Set (mathematics) and Surjective function · See more »

Symmetric difference

In mathematics, the symmetric difference, also known as the disjunctive union, of two sets is the set of elements which are in either of the sets and not in their intersection.

New!!: Set (mathematics) and Symmetric difference · See more »

Taxonomy (general)

Taxonomy is the practice and science of classification.

New!!: Set (mathematics) and Taxonomy (general) · See more »

The Paradoxes of the Infinite

The Paradoxes of the Infinite (German title: Paradoxien des Unendlichen) is a mathematical work by Bernard Bolzano on the theory of sets.

New!!: Set (mathematics) and The Paradoxes of the Infinite · See more »

Transcendental number

In mathematics, a transcendental number is a real or complex number that is not algebraic—that is, it is not a root of a nonzero polynomial equation with integer (or, equivalently, rational) coefficients.

New!!: Set (mathematics) and Transcendental number · See more »


In mathematics, a tuple is a finite ordered list (sequence) of elements.

New!!: Set (mathematics) and Tuple · See more »

Uncountable set

In mathematics, an uncountable set (or uncountably infinite set) is an infinite set that contains too many elements to be countable.

New!!: Set (mathematics) and Uncountable set · See more »

Universal set

In set theory, a universal set is a set which contains all objects, including itself.

New!!: Set (mathematics) and Universal set · See more »

Universe (mathematics)

In mathematics, and particularly in set theory, category theory, type theory, and the foundations of mathematics, a universe is a collection that contains all the entities one wishes to consider in a given situation.

New!!: Set (mathematics) and Universe (mathematics) · See more »

Venn diagram

A Venn diagram (also called primary diagram, set diagram or logic diagram) is a diagram that shows all possible logical relations between a finite collection of different sets.

New!!: Set (mathematics) and Venn diagram · See more »

Vertical bar

The vertical bar (|) is a computer character and glyph with various uses in mathematics, computing, and typography.

New!!: Set (mathematics) and Vertical bar · See more »


In mathematics, an expression is called well-defined or unambiguous if its definition assigns it a unique interpretation or value.

New!!: Set (mathematics) and Well-defined · See more »


0 (zero) is both a number and the numerical digit used to represent that number in numerals.

New!!: Set (mathematics) and 0 · See more »

Redirects here:

Basic set operations, Conventional set, Crisp set, Finite subset, Mathematical set, Number set, Number sets, SeT, Set (math), Set (mathematical), Set logic.


[1] https://en.wikipedia.org/wiki/Set_(mathematics)

Hey! We are on Facebook now! »