Circumflex

 â
Ĉ ĉ
Ê ê
ế
Ĝ ĝ
Ĥ ĥ
Î î
Ĵ ĵ
Ô ô
Ŝ ŝ
Û û
Ŵ ŵ
Ŷ ŷ

The circumflex ( ˆ ) is a diacritic mark used in the written forms of many languages, and is also commonly used in various romanization and transcription schemes. It received its English name from Latin circumflexus (bent about)—a translation of the Greek περισπωμένη (perispōménē).

Contents

Uses

Pitch

The circumflex accent was first used in the polytonic orthography of Ancient Greek, where it occurred on the accented syllable on long vowels where there was a rise and then a fall in pitch. The term is also used to describe similar tonal accents that result from combining two vowels in related languages such as Sanskrit and Latin. The circumflex is a combination of an acute and a grave accent. Sometimes it takes the form of a tilde or an inverted breve. Since Modern Greek has a stress accent instead of a pitch accent, this diacritic has been replaced with an acute accent in the modern monotonic orthography. The circumflex accent placed over a vowel symbol may also indicate, in some languages, that the vowel or the syllable containing it is to be pronounced in a certain way. For example, in French, the mark ^ indicates that the vowel so marked is both of a certain quality and long. In Albanian, ˘ indicates that the vowel is nasalized and stressed. In Classical Greek, the mark ~ shows that the syllable beneath bears the word accent and is pronounced, according to the ancient grammarians, with a rise and fall in pitch.

Length

The circumflex accent marks a long vowel in the orthography or transliteration of several languages.

Stress

The circumflex accent marks the stressed vowel of a word in some languages:

Height

The circumflex is also used to indicate the relative height of some vowels:

Letter extension

Other regular uses

Diacritical marks

accent
acute( ´ )
double acute( ˝ )
grave( ` )
double grave(  ̏ )
breve( ˘ )
inverted breve(  ̑ )
caron / háček( ˇ )
cedilla / cédille( ¸ )
circumflex / vokáň( ˆ )
diaeresis / umlaut( ¨ )
dot( · )
hook / dấu hỏi(  ̉ )
horn / dấu móc(  ̛ )
macron( ¯ )
ogonek / nosinė( ˛ )
ring / kroužek( ˚, ˳ )
rough breathing / dasia(    )
smooth breathing / psili(  ᾿  )
Marks sometimes used as diacritics
apostrophe( )
bar( | )
colon( : )
comma( , )
hyphen( ˗ )
tilde( ~ )
titlo(  ҃ )
Diacritical marks in other scripts
Arabic diacritics
Gurmukhi diacritics
Hebrew diacritics
Indic diacritics
anusvara( )
chandrabindu( )
nukta( )
virama( )
IPA diacritics
Japanese diacritics
dakuten( )
handakuten( )
Khmer diacritics
Syriac diacritics
Thai diacritics

Exceptional use

Mathematics

In mathematics, the circumflex is used to modify variable names; it is usually read "hat", e.g. î is "i hat". The Fourier transform of a function ƒ is often denoted by \hat f.

In vector notation, it is used to identify unit vectors; for instance î stands for a unit vector in the direction of the x-axis.

In statistics, it is often used for the maximum likelihood estimator of a parameter.

Technical notes

The ISO-8859-1 character encoding includes the letters â, ê, î, ô, û, and their respective capital forms. Dozens more letters with the circumflex are available in Unicode. Unicode also uses the circumflex as a combining character with the code point U+0302.

See also

Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz
Letters using circumflex accent
ÂâĈĉÊêĜĝĤĥÎîĴĵÔôŜŝÛûŴŵŶŷẐẑ

history • palaeography derivations • diacritics punctuation numerals Unicode • list of letters • ISO/IEC 646

References

  1. 1.0 1.1 www.tdk.gov.tr

External links