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What (who) is fixed points - definition
WIKIMEDIA DISAMBIGUATION PAGE
Fixed Point; Fixed-point; Fixed points; Fixed point (disambiguation)
fixed point
¦ noun
1. Physics a well-defined reproducible temperature which can be used as a reference point, e.g. one defined by a change of phase.
2. [as modifier] Computing denoting a mode of representing a number by a single sequence of digits whose values depend on their location relative to a predetermined radix point.
fixed point
<mathematics> The fixed point of a function, f is any value, x
for which f x = x. A function may have any number of fixed
points from none (e.g. f x = x+1) to infinitely many (e.g. f x
= x). The fixed point combinator, written as either "fix"
or "Y" will return the fixed point of a function.
See also least fixed point.
(1995-04-13)
fixed-point
<programming> A number representation scheme where a number,
F is represented by an integer I such that F=I*R^-P, where R is
the (assumed) radix of the representation and P is the (fixed)
number of digits after the radix point.
On computers with no floating-point unit, fixed-point
calculations are significantly faster than floating-point as
all the operations are basically integer operations.
Fixed-point representation also has the advantage of having
uniform density, i.e., the smallest resolvable difference of
the representation is R^-P throughout the representable range,
in contrast to floating-point representations.
For example, in PL/I, FIXED data has both a precision and
a scale-factor (P above). So a number declared as 'FIXED
DECIMAL(7,2)' has a precision of seven and a scale-factor of
two, indicating five integer and two fractional decimal
digits. The smallest difference between numbers will be 0.01.
(2006-11-15)
Wikipedia
Fixed point
Fixed point may refer to:
- Fixed point (mathematics), a value that does not change under a given transformation
- Fixed-point arithmetic, a manner of doing arithmetic on computers
- Fixed point, a benchmark (surveying) used by geodesists
- Fixed point join, also called a recursive join
- Fixed point, in quantum field theory, a coupling where the beta function vanishes – see renormalization group § conformal symmetry
Examples of use of fixed points
1. Jack didn‘t have many other fixed points in his life.
2. Fixed points in the political landscape have changed, and their policies are not keeping up.
3. It remains to be seen if Afghan government troops can hold fixed points that have been subjected to constant attack.
4. Anyone who has been up that early in the morning knows that you have to navigate in those early hours by fixed points.
5. And in a world of faster and faster change, with fewer and fewer fixed points, the family can be our rock in a stormy sea.