Let f: A->A be a function. x is called a fixed point of f if f(x)=x.

Of course this means that no matter how many times we apply f to x, it remains the same. So we would expect x to be a limit for a process of repeatedly applying f to any point. Under certain conditions, a fixed point exists and satisfies this limiting property.

In computing, a type of number representation. It has an integer mantissa of some length, and (Typically implicitly, as, the precision being fixed, this quantity is fixed), a divisor, d (Often, this divisor will be 1).

Example, to represent 0.312 in a fixed-point representation, we would have 312, and the known divisor 1000.

Contrast floating point.