Full Width at Half Maximum
The full width at half maximum (FWHM) is a parameter commonly used to describe the width of a ``bump'' on a curve or function.It is given by the distance between points on the curve at which the function reaches half its maximum value. The followingtable gives analytic and numerical full widths for several common curves.
| Function | Formula | FWHM |
| Bartlett |  |  |
| Blackman |  | |
| Connes |  |  |
| Cosine |  |  |
| Gaussian |  |  |
| Hamming |  | |
| Hanning | | |
| Lorentzian |  |  |
| Welch |  |  |
- Arc Minute
- Arcsecant
- Arc Second
- Arcsine
- Arctangent
- Area
- Area Element
- Areal Coordinates
- Area-Preserving Map
- Area Principle
- Arf Invariant
- Argand Diagram
- Argand Plane
- Argoh's Conjecture
- Argument Addition Relation
- Argument (Complex Number)
- Argument (Elliptic Integral)
- Argument (Function)
- Argument Multiplication Relation
- Argument Principle
- Argument Variation
- Aristotle's Wheel Paradox
- Arithmetic
- Arithmetic-Geometric Mean
- Arithmetic Geometry