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Function (mathematics) - Wikipedia

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 functions site

functions.wolfram.com/

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

What is a Function - Math is Fun

www.mathsisfun.com/sets/function.html

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.

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 ...

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 ...

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 ...

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 ...

Wolfram|Alpha Examples: Mathematical Functions

www.wolframalpha.com/examples/MathematicalFunctions.html

Calculators for mathematical functions--domain & range, injectivity & surjectivity, continuity, periodic functions, even & odd functions, special & number theoretic ...

Mathematical functions — NumPy v1.11 Manual

docs.scipy.org/doc/numpy/reference/routines.math.html

i0(x), Modified Bessel function of the first kind, order 0. ... Mathematical functions. Trigonometric functions; Hyperbolic functions; Rounding; Sums, products, ...

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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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 ...

NIST Digital Library of Mathematical Functions: DLMF

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 ...

Common mathematical functions - cppreference.com

en.cppreference.com

Sep 8, 2016 ... Common mathematical functions. From cppreference.com ... Trigonometric and hyperbolic functions ... Floating point manipulation functions ...