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Function (mathematics)

en.wikipedia.org/wiki/Function_(mathematics)

In mathematics, a function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output.

MATHEMATICAL FUNCTIONS - THE ... - Wolfram Research

functions.wolfram.com/

The world's largest collection of formulas and graphics about more than 300000 mathematical functions for the mathematics and science communities.

NIST Digital Library of Mathematical Functions

dlmf.nist.gov/

Result of a project to provide a modern revision of Abramowitz and Stegun's " Handbook of Mathematical Functions". The site includes definitions, properties, and ...

What is a function? | Functions & function notation | Khan Academy

www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-functions-and-function-notation/v/what-is-a-function

Functions assign a single unique output for each of their inputs. In this video, Sal gives many examples of various kinds of functions. ... Subjects. Math by subject.

Mathematical function - definition of mathematical function by The ...

www.thefreedictionary.com/mathematical function

Noun, 1. mathematical function - (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an ...

Algebra - The Definition of a Function - Pauls Online Math Notes

tutorial.math.lamar.edu/Classes/Alg/FunctionDefn.aspx

This seems like an odd definition but we'll need it for the definition of a function ( which is the main topic of this section). However, before we actually give the ...

Functions, graphs, sequences & series - Maths Tutor

www.mathtutor.ac.uk/functions

What are functions ? From an introduction of the basic concepts of functions to more advanced functions met in economics, engineering and the sciences, these  ...

Mathematical Functions (Transact-SQL) - MSDN - Microsoft

msdn.microsoft.com/en-us/library/ms177516.aspx

Date and Time Data Types and Functions (Transact-SQL) ... All mathematical functions, except for RAND, are deterministic functions. This means they return the ...

PHP: Math Functions - Manual

php.net/manual/en/ref.math.php

I was looking for a truncate function. Not finding one, I wrote my own. Since it deals with everything as a number, I imagine it's faster than the alternative of using ...

GNU Scientific Library – Reference Manual: Mathematical Functions

www.gnu.org/s/gsl/manual/html_node/Mathematical-Functions.html

This chapter describes basic mathematical functions. Some of these functions are present in system libraries, but the alternative versions given here can be used ...

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What is a Function - Math is Fun

www.mathsisfun.com

But we are not going to look at specific functions ... ... instead we will look at the general idea of a function. Names. First, it is useful to give a function a name.

Functions | Algebra I | Khan Academy

www.khanacademy.org

Functions are mathematical entities that assign unique outputs to given inputs. Sounds simple? Think again! In this topic you will evaluate, graph, analyze, and ...

What is a function? | Introduction to functions | Khan Academy

www.khanacademy.org

Functions assign a single unique output for each of their inputs. In this video, Sal gives many examples of various kinds of functions. ... Subjects. Math by subject.