<P> 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 . In equations , the function is given by f ( x ) = x . </P>
<P> 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 . In equations , the function is given by f ( x ) = x . </P>
f x x is what type of function
f x x is what type of function
an identity function , also called an identity relation or identity map or identity transformation
an identity function , also called an identity relation or identity map or identity transformation