(Created page with "== Function == In mathematics, a function $f(\cdot)$ is a set of pairs $x, f(x)$, where * $x$ is input, $f(x)$ is output * all possible inputs $x$ that a function can take is...") |
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In mathematics, a function $f(\cdot)$ is a set of pairs $x, f(x)$, where
For two functions $f$ and $g$, composition is $f \circ g$
For example,
For $f$ its inverse is $f^{-1}$
That's the simplest type of functions: they have one input and one output
These functions are more complex:
Functions, like Vectors, can form Vector Spaces