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One half is the
A number raised to the Exponentiation, power of one half is equal to its square root.
The area of a triangle is one half its Triangle#Area, base and Altitude (triangle), altitude (or height).
The gamma function evaluated at one half is the square root of pi.
It has two different decimal representations in base ten, the familiar and the recurring decimal, recurring , with a similar pair of expansions in any even Base of computation, base; while in odd bases, one half has no Repeating decimal, terminating representation.
The Bernoulli number has the value (its sign depending on competing conventions).
The Riemann hypothesis is the conjecture that every nontrivial complex number, complex root of the Riemann zeta function has a real part equal to .
*Division by two
multiplicative inverse
In mathematics, a multiplicative inverse or reciprocal for a number ''x'', denoted by 1/''x'' or ''x''−1, is a number which when Multiplication, multiplied by ''x'' yields the multiplicative identity, 1. The multiplicative inverse of a ra ...
of 2. It is an irreducible fraction
An irreducible fraction (or fraction in lowest terms, simplest form or reduced fraction) is a fraction in which the numerator and denominator are integers that have no other common divisors than 1 (and −1, when negative numbers are considered). ...
with a numerator of 1 and a denominator of 2. It often appears in mathematical equation
In mathematics, an equation is a mathematical formula that expresses the equality of two expressions, by connecting them with the equals sign . The word ''equation'' and its cognates in other languages may have subtly different meanings; for e ...
s, recipe
A recipe is a set of instructions that describes how to prepare or make something, especially a dish (food), dish of prepared food. A sub-recipe or subrecipe is a recipe for an ingredient that will be called for in the instructions for the main r ...
s and measurement
Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events.
In other words, measurement is a process of determining how large or small a physical quantity is as compared to ...
s.
As a word
One half is one of the few fractions which are commonly expressed in naturallanguage
Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both in spoken and signed language, signed forms, and may also be conveyed through writing syste ...
s by suppletion
In linguistics and etymology, suppletion is traditionally understood as the use of one word as the inflected form of another word when the two words are not cognate. For those learning a language, suppletive forms will be seen as "irregular" or ev ...
rather than regular derivation. In English
English usually refers to:
* English language
* English people
English may also refer to:
Culture, language and peoples
* ''English'', an adjective for something of, from, or related to England
* ''English'', an Amish ter ...
, for example, compare the compound
Compound may refer to:
Architecture and built environments
* Compound (enclosure), a cluster of buildings having a shared purpose, usually inside a fence or wall
** Compound (fortification), a version of the above fortified with defensive struc ...
"one half" with other regular formations like "one-sixth".
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
The hyphen is a punctuation mark used to join words and to separate syllables of a single word. The use of hyphens is called hyphenation.
The hyphen is sometimes confused with dashes (en dash , em dash and others), which are wider, or with t ...
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 Exponentiation, power of one half is equal to its square root.
The area of a triangle is one half its Triangle#Area, base and Altitude (triangle), altitude (or height).
The gamma function evaluated at one half is the square root of pi.
It has two different decimal representations in base ten, the familiar and the recurring decimal, recurring , with a similar pair of expansions in any even Base of computation, base; while in odd bases, one half has no Repeating decimal, terminating representation.
The Bernoulli number has the value (its sign depending on competing conventions).
The Riemann hypothesis is the conjecture that every nontrivial complex number, complex root of the Riemann zeta function has a real part equal to .
Computer characters
The "one-half" symbol has its own code point as a precomposed character in the Latin-1 Supplement block of Unicode, rendering as . The reduced size of this symbol may make it illegible to readers with relatively mild visual impairment; consequently the decomposed forms or may be more appropriate.See also
*Division by two
References
{{Fractions and ratios Fractions (mathematics), Half Rational numbers