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

Idempotence

Index Idempotence

Idempotence is the property of certain operations in mathematics and computer science that they can be applied multiple times without changing the result beyond the initial application. [1]

73 relations: Absolute value, Absorbing element, Abstract algebra, Basis (linear algebra), Benjamin Peirce, Binary operation, Biordered set, Boolean algebra, Cambridge University Press, Closure (topology), Closure operator, Complex number, Computer science, Constant function, Cyclic code, Database, Elevator, Event stream processing, Fixed point (mathematics), Floor and ceiling functions, Formal grammar, Free On-line Dictionary of Computing, Function (mathematics), Function composition, Functional programming, Hypertext Transfer Protocol, Idempotent matrix, Idempotent relation, Identity element, Identity function, Indecomposable module, Integer sequence, Intersection (set theory), Involution (mathematics), Iterated function, Join and meet, Kleene star, Lattice (order), Linear algebra, Linear map, List of matrices, Load/store architecture, Logical conjunction, Logical disjunction, Mathematics, Maxima and minima, Merriam-Webster, Method (computer programming), Michiel Hazewinkel, Modular arithmetic, ..., Module (mathematics), Multiplication, Necessity and sufficiency, Nilpotent, Operation (mathematics), Oxford English Dictionary, Page fault, Plane (geometry), Power set, Prettyprint, Projection (linear algebra), Pure function, Real number, Referential transparency, Ring (mathematics), Semiring, Side effect (computer science), Subroutine, Topological space, Truth value, Unary operation, Union (set theory), Vector space. Expand index (23 more) »

Absolute value

In mathematics, the absolute value or modulus of a real number is the non-negative value of without regard to its sign.

New!!: Idempotence and Absolute value · See more »

Absorbing element

In mathematics, an absorbing element is a special type of element of a set with respect to a binary operation on that set.

New!!: Idempotence and Absorbing element · See 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!!: Idempotence and Abstract algebra · See more »

Basis (linear algebra)

In mathematics, a set of elements (vectors) in a vector space V is called a basis, or a set of, if the vectors are linearly independent and every vector in the vector space is a linear combination of this set.

New!!: Idempotence and Basis (linear algebra) · See more »

Benjamin Peirce

Benjamin Peirce FRSFor HFRSE April 4, 1809 – October 6, 1880) was an American mathematician who taught at Harvard University for approximately 50 years. He made contributions to celestial mechanics, statistics, number theory, algebra, and the philosophy of mathematics.

New!!: Idempotence and Benjamin Peirce · See more »

Binary operation

In mathematics, a binary operation on a set is a calculation that combines two elements of the set (called operands) to produce another element of the set.

New!!: Idempotence and Binary operation · See more »

Biordered set

A biordered set ("boset") is a mathematical object that occurs in the description of the structure of the set of idempotents in a semigroup.

New!!: Idempotence and Biordered set · See more »

Boolean algebra

In mathematics and mathematical logic, Boolean algebra is the branch of algebra in which the values of the variables are the truth values true and false, usually denoted 1 and 0 respectively.

New!!: Idempotence and Boolean algebra · See more »

Cambridge University Press

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

New!!: Idempotence and Cambridge University Press · See more »

Closure (topology)

In mathematics, the closure of a subset S of points in a topological space consists of all points in S together with all limit points of S. The closure of S may equivalently be defined as the union of S and its boundary, and also as the intersection of all closed sets containing S. Intuitively, the closure can be thought of as all the points that are either in S or "near" S. A point which is in the closure of S is a point of closure of S. The notion of closure is in many ways dual to the notion of interior.

New!!: Idempotence and Closure (topology) · See more »

Closure operator

In mathematics, a closure operator on a set S is a function \operatorname: \mathcal(S)\rightarrow \mathcal(S) from the power set of S to itself which satisfies the following conditions for all sets X,Y\subseteq S |- | X \subseteq \operatorname(X) | (cl is extensive) |- | X\subseteq Y \Rightarrow \operatorname(X) \subseteq \operatorname(Y) | (cl is increasing) |- | \operatorname(\operatorname(X)).

New!!: Idempotence and Closure operator · 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!!: Idempotence and Complex number · See more »

Computer science

Computer science deals with the theoretical foundations of information and computation, together with practical techniques for the implementation and application of these foundations.

New!!: Idempotence and Computer science · See more »

Constant function

In mathematics, a constant function is a function whose (output) value is the same for every input value.

New!!: Idempotence and Constant function · See more »

Cyclic code

In coding theory, a cyclic code is a block code, where the circular shifts of each codeword gives another word that belongs to the code.

New!!: Idempotence and Cyclic code · See more »

Database

A database is an organized collection of data, stored and accessed electronically.

New!!: Idempotence and Database · See more »

Elevator

An elevator (US and Canada) or lift (UK, Australia, Ireland, New Zealand, and South Africa, Nigeria) is a type of vertical transportation that moves people or goods between floors (levels, decks) of a building, vessel, or other structure.

New!!: Idempotence and Elevator · See more »

Event stream processing

Event stream processing, or ESP, is a set of technologies designed to assist the construction of event-driven information systems.

New!!: Idempotence and Event stream processing · See more »

Fixed point (mathematics)

In mathematics, a fixed point (sometimes shortened to fixpoint, also known as an invariant point) of a function is an element of the function's domain that is mapped to itself by the function.

New!!: Idempotence and Fixed point (mathematics) · See more »

Floor and ceiling functions

In mathematics and computer science, the floor function is the function that takes as input a real number x and gives as output the greatest integer less than or equal to x, denoted \operatorname(x).

New!!: Idempotence and Floor and ceiling functions · See more »

Formal grammar

In formal language theory, a grammar (when the context is not given, often called a formal grammar for clarity) is a set of production rules for strings in a formal language.

New!!: Idempotence and Formal grammar · See more »

Free On-line Dictionary of Computing

The Free On-line Dictionary of Computing (FOLDOC) is an online, searchable, encyclopedic dictionary of computing subjects.

New!!: Idempotence and Free On-line Dictionary of Computing · See more »

Function (mathematics)

In mathematics, a function was originally the idealization of how a varying quantity depends on another quantity.

New!!: Idempotence and Function (mathematics) · See more »

Function composition

In mathematics, function composition is the pointwise application of one function to the result of another to produce a third function.

New!!: Idempotence and Function composition · See more »

Functional programming

In computer science, functional programming is a programming paradigm—a style of building the structure and elements of computer programs—that treats computation as the evaluation of mathematical functions and avoids changing-state and mutable data.

New!!: Idempotence and Functional programming · See more »

Hypertext Transfer Protocol

The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, and hypermedia information systems.

New!!: Idempotence and Hypertext Transfer Protocol · See more »

Idempotent matrix

In linear algebra, an idempotent matrix is a matrix which, when multiplied by itself, yields itself.

New!!: Idempotence and Idempotent matrix · See more »

Idempotent relation

In mathematics, an idempotent binary relation R ⊆ X × X is one for which R ∘ R.

New!!: Idempotence and Idempotent relation · See more »

Identity element

In mathematics, an identity element or neutral element is a special type of element of a set with respect to a binary operation on that set, which leaves other elements unchanged when combined with them.

New!!: Idempotence and Identity element · See more »

Identity function

Graph of the identity function on the real numbers In mathematics, an identity function, also called an identity relation or identity map or identity transformation, is a function that always returns the same value that was used as its argument.

New!!: Idempotence and Identity function · See more »

Indecomposable module

In abstract algebra, a module is indecomposable if it is non-zero and cannot be written as a direct sum of two non-zero submodules.

New!!: Idempotence and Indecomposable module · See more »

Integer sequence

In mathematics, an integer sequence is a sequence (i.e., an ordered list) of integers.

New!!: Idempotence and Integer sequence · See more »

Intersection (set theory)

In mathematics, the intersection A ∩ B of two sets A and B is the set that contains all elements of A that also belong to B (or equivalently, all elements of B that also belong to A), but no other elements.

New!!: Idempotence and Intersection (set theory) · See more »

Involution (mathematics)

In mathematics, an involution, or an involutory function, is a function that is its own inverse, for all in the domain of.

New!!: Idempotence and Involution (mathematics) · See more »

Iterated function

In mathematics, an iterated function is a function (that is, a function from some set to itself) which is obtained by composing another function with itself a certain number of times.

New!!: Idempotence and Iterated function · See more »

Join and meet

In a partially ordered set P, the join and meet of a subset S are respectively the supremum (least upper bound) of S, denoted ⋁S, and infimum (greatest lower bound) of S, denoted ⋀S.

New!!: Idempotence and Join and meet · See more »

Kleene star

In mathematical logic and computer science, the Kleene star (or Kleene operator or Kleene closure) is a unary operation, either on sets of strings or on sets of symbols or characters.

New!!: Idempotence and Kleene star · See more »

Lattice (order)

A lattice is an abstract structure studied in the mathematical subdisciplines of order theory and abstract algebra.

New!!: Idempotence and Lattice (order) · See more »

Linear algebra

Linear algebra is the branch of mathematics concerning linear equations such as linear functions such as and their representations through matrices and vector spaces.

New!!: Idempotence and Linear algebra · See more »

Linear map

In mathematics, a linear map (also called a linear mapping, linear transformation or, in some contexts, linear function) is a mapping between two modules (including vector spaces) that preserves (in the sense defined below) the operations of addition and scalar multiplication.

New!!: Idempotence and Linear map · See more »

List of matrices

This page lists some important classes of matrices used in mathematics, science and engineering.

New!!: Idempotence and List of matrices · See more »

Load/store architecture

In computer engineering, a load/store architecture is an instruction set architecture that divides instructions into two categories: memory access (load and store between memory and registers), and ALU operations (which only occur between registers).

New!!: Idempotence and Load/store architecture · See more »

Logical conjunction

In logic, mathematics and linguistics, And (∧) is the truth-functional operator of logical conjunction; the and of a set of operands is true if and only if all of its operands are true.

New!!: Idempotence and Logical conjunction · See more »

Logical disjunction

In logic and mathematics, or is the truth-functional operator of (inclusive) disjunction, also known as alternation; the or of a set of operands is true if and only if one or more of its operands is true.

New!!: Idempotence and Logical disjunction · See more »

Mathematics

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

New!!: Idempotence and Mathematics · See more »

Maxima and minima

In mathematical analysis, the maxima and minima (the respective plurals of maximum and minimum) of a function, known collectively as extrema (the plural of extremum), are the largest and smallest value of the function, either within a given range (the local or relative extrema) or on the entire domain of a function (the global or absolute extrema).

New!!: Idempotence and Maxima and minima · See more »

Merriam-Webster

Merriam–Webster, Incorporated is an American company that publishes reference books which is especially known for its dictionaries.

New!!: Idempotence and Merriam-Webster · See more »

Method (computer programming)

A method in object-oriented programming (OOP) is a procedure associated with a message and an object.

New!!: Idempotence and Method (computer programming) · See more »

Michiel Hazewinkel

Michiel Hazewinkel (born 22 June 1943) is a Dutch mathematician, and Emeritus Professor of Mathematics at the Centre for Mathematics and Computer and the University of Amsterdam, particularly known for his 1978 book Formal groups and applications and as editor of the Encyclopedia of Mathematics.

New!!: Idempotence and Michiel Hazewinkel · See more »

Modular arithmetic

In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" upon reaching a certain value—the modulus (plural moduli).

New!!: Idempotence and Modular arithmetic · See more »

Module (mathematics)

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

New!!: Idempotence and Module (mathematics) · See more »

Multiplication

Multiplication (often denoted by the cross symbol "×", by a point "⋅", by juxtaposition, or, on computers, by an asterisk "∗") is one of the four elementary mathematical operations of arithmetic; with the others being addition, subtraction and division.

New!!: Idempotence and Multiplication · See more »

Necessity and sufficiency

In logic, necessity and sufficiency are terms used to describe an implicational relationship between statements.

New!!: Idempotence and Necessity and sufficiency · See more »

Nilpotent

In mathematics, an element, x, of a ring, R, is called nilpotent if there exists some positive integer, n, such that xn.

New!!: Idempotence and Nilpotent · See more »

Operation (mathematics)

In mathematics, an operation is a calculation from zero or more input values (called operands) to an output value.

New!!: Idempotence and Operation (mathematics) · See more »

Oxford English Dictionary

The Oxford English Dictionary (OED) is the main historical dictionary of the English language, published by the Oxford University Press.

New!!: Idempotence and Oxford English Dictionary · See more »

Page fault

A page fault (sometimes called #PF, PF or hard fault) is a type of exception raised by computer hardware when a running program accesses a memory page that is not currently mapped by the memory management unit (MMU) into the virtual address space of a process.

New!!: Idempotence and Page fault · See more »

Plane (geometry)

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

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

Power set

In mathematics, the power set (or powerset) of any set is the set of all subsets of, including the empty set and itself, variously denoted as, 𝒫(), ℘() (using the "Weierstrass p"),,, or, identifying the powerset of with the set of all functions from to a given set of two elements,.

New!!: Idempotence and Power set · See more »

Prettyprint

Prettyprint (or pretty-print) is the application of any of various stylistic formatting conventions to text files, such as source code, markup, and similar kinds of content.

New!!: Idempotence and Prettyprint · See more »

Projection (linear algebra)

In linear algebra and functional analysis, a projection is a linear transformation P from a vector space to itself such that.

New!!: Idempotence and Projection (linear algebra) · See more »

Pure function

In computer programming, a function or expression is considered pure if its evaluation has no side effect, such as mutation of objects or output to I/O devices.

New!!: Idempotence and Pure function · 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!!: Idempotence and Real number · See more »

Referential transparency

Referential transparency and referential opacity are properties of parts of computer programs.

New!!: Idempotence and Referential transparency · See more »

Ring (mathematics)

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

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

Semiring

In abstract algebra, a semiring is an algebraic structure similar to a ring, but without the requirement that each element must have an additive inverse.

New!!: Idempotence and Semiring · See more »

Side effect (computer science)

In computer science, a function or expression is said to have a side effect if it modifies some state outside its scope or has an observable interaction with its calling functions or the outside world besides returning a value.

New!!: Idempotence and Side effect (computer science) · See more »

Subroutine

In computer programming, a subroutine is a sequence of program instructions that performs a specific task, packaged as a unit.

New!!: Idempotence and Subroutine · See more »

Topological space

In topology and related branches of mathematics, a topological space may be defined as a set of points, along with a set of neighbourhoods for each point, satisfying a set of axioms relating points and neighbourhoods.

New!!: Idempotence and Topological space · See more »

Truth value

In logic and mathematics, a truth value, sometimes called a logical value, is a value indicating the relation of a proposition to truth.

New!!: Idempotence and Truth value · See more »

Unary operation

In mathematics, a unary operation is an operation with only one operand, i.e. a single input.

New!!: Idempotence and Unary operation · See more »

Union (set theory)

In set theory, the union (denoted by ∪) of a collection of sets is the set of all elements in the collection.

New!!: Idempotence and Union (set theory) · See more »

Vector space

A vector space (also called a linear space) is a collection of objects called vectors, which may be added together and multiplied ("scaled") by numbers, called scalars.

New!!: Idempotence and Vector space · See more »

Redirects here:

Idempotence (computer science), Idempotency, Idempotent, Idempotent (software), Idempotent element, Idempotent function, Indempotency, Indempotent.

References

[1] https://en.wikipedia.org/wiki/Idempotence

OutgoingIncoming
Hey! We are on Facebook now! »