One half
| ||||
|---|---|---|---|---|
Chinese 半 | | |||
| Tibetan | ༪ | |||
One half is the
As a word
One half is one of the few fractions which are commonly expressed in natural
A half can also be said to be one part of something divided into two equal parts. It is acceptable to write one half as a hyphenated word, one-half.
Mathematics
One half is the rational number that lies midway between 0 and 1 on the number line. Multiplication by one half is equivalent to division by two, or "halving"; conversely, division by one half is equivalent to multiplication by two, or "doubling".
A number raised to the power of one half is equal to its square root.
The area of a
The gamma function evaluated at one half is the square root of pi.
It has two different
The Bernoulli number has the value (its sign depending on competing conventions).
The Riemann hypothesis is the conjecture that every nontrivial complex root of the Riemann zeta function has a real part equal to .
Computer characters
| ½ | |
|---|---|
vulgar fraction one half | |
| In Unicode | U+00BD ½ VULGAR FRACTION ONE HALF |
| Related | |
| See also | U+00BC ¼ VULGAR FRACTION ONE QUARTER U+00BE ¾ VULGAR FRACTION THREE QUARTERS |
The "one-half" symbol has its own code point as a precomposed character in the Latin-1 Supplement block of Unicode, rendering as ½.
The reduced size of this symbol may make it illegible to readers with relatively mild visual impairment; consequently the decomposed forms 1⁄2 or 1/2 may be more appropriate.
See also
References
 | Division and ratio |  | |
|---|---|---|---|
| Fraction |
| ||