Omega: Difference between revisions

Revision as of 06:08, 12 November 2025

Template:Short description Script error: No such module "redirect hatnote". Script error: No such module "about". Script error: No such module "other uses". Script error: No such module "Unsubst". Template:Use dmy dates Template:Greek AlphabetOmega (Template:IPAc-en, Template:IPAc-en;^[1] uppercase Ω, lowercase ω) is the twenty-fourth and last letter in the Greek alphabet. In the Greek numeric system/isopsephy (gematria), it has a value of 800. The name of the letter was originally Script error: No such module "Lang". (Script error: No such module "lang". Script error: No such module "IPA".), but it was later changed to Template:Wikt-lang (Script error: No such module "lang". 'big o') in the Middle Ages to distinguish it from omicron Template:Angbr, whose name means 'small o', as both letters had come to be pronounced Script error: No such module "IPA"..^[2] In modern Greek, its name has fused into Script error: No such module "Lang". (Script error: No such module "lang".).

In phonetic terms, the Ancient Greek Ω represented a long open-mid back rounded vowel Script error: No such module "IPA"., in contrast to omicron, which represented the close-mid back rounded vowel Script error: No such module "IPA"., and the digraph Template:Angbr, which represented the long close back rounded vowel Script error: No such module "IPA".. In modern Greek, both omega and omicron represent the mid back rounded vowel Script error: No such module "IPA".. The letter omega is transliterated into a Latin-script alphabet as Script error: No such module "lang". or simply Script error: No such module "lang"..

As the final letter in the Greek alphabet, omega is often used to denote the last, the end, or the ultimate limit of a set, in contrast to alpha, the first letter of the Greek alphabet; see Alpha and Omega.

History

Ω was not part of the early (8th century BC) Greek alphabets. It was introduced in the late 7th century BC in the Ionian cities of Asia Minor to denote a long open-mid back rounded vowel Script error: No such module "IPA".. It is a variant of omicron (Ο), broken up at the side (File:Greek Omega 09.svg), with the edges subsequently turned outward (Template:GrGl, Template:GrGl, Template:GrGl, Template:GrGl).^[3] The Dorian city of Knidos as well as a few Aegean islands, namely Paros, Thasos and Melos, chose the exact opposite innovation, using a broken-up circle for the short and a closed circle for the long Script error: No such module "IPA"..^[3]

The name Ωμέγα is Byzantine; in Classical Greek, the letter was called ō (Script error: No such module "Lang".) (pronounced /ɔ̂ː/), whereas the omicron was called ou (Script error: No such module "Lang".) (pronounced /ôː/).^[4] The modern lowercase shape goes back to the uncial form File:Greek uncial Omega.svg, a form that developed during the 3rd century BC in ancient handwriting on papyrus, from a flattened-out form of the letter (File:Greek Omega 08.svg) that had its edges curved even further upward.^[5]

In addition to the Greek alphabet, Omega was also adopted into the early Cyrillic alphabet (see Cyrillic omega (Ѡ, ѡ)). A Raetic variant is conjectured to be at the origin or parallel evolution of the Elder Futhark ᛟ.

Omega was also adopted into the Latin alphabet, as a letter of the 1982 revision to the African reference alphabet. It is in sparse use (see Latin omega).

The symbol Ω (uppercase letter)

File:Kos città, piazza eleftherias, edificio razionalista, targa.JPG

Plaque in Kos with "underlined O" form of omega

The uppercase letter Ω is used as a symbol:

In chemistry:
- For oxygen-18, a natural, stable isotope of oxygen^[6]
- For omega loop, a protein structural motif consisting of a loop of six or more amino acid residues in any sequence, a structure named for its resemblance to the Greek letter.^[7]
In physics:
- For ohm – SI unit of electrical resistance.^[8] Unicode has a separate code point Template:Unichar (HTML entity &ohm;), but it is included only for backward compatibility, and the canonically equivalent code point Template:Unichar (Ω) is preferred. Also formerly also used upside down (Template:Unichar) to represent mho, the old name for the inverse of an ohm (now siemens with symbol S), the SI unit of electrical conductance.^[9]
- In statistical mechanics, Ω refers to the multiplicity (number of microstates) in a system.
- The solid angle^[10]^[11] or the rate of precession in a gyroscope
- In particle physics to represent the Omega baryons
- In astronomy (cosmology), Ω refers to the average density of the universe, also called the density parameter.
- In astronomy (orbital mechanics), Ω refers to the longitude of the ascending node of an orbit.^[12]
In mathematics and computer science:
- In complex analysis, the Omega constant, a solution of Lambert's W function^[13]
- In differential geometry, the space of differential forms on a manifold (of a certain degree, usually with a superscript).
- A variable for a 2-dimensional region in calculus, usually corresponding to the domain of a double integral.
- In topos theory, the (codomain of the) subobject classifier of an elementary topos.
- In combinatory logic, the looping combinator, (S I I (S I I))
- In group theory, the omega and agemo subgroups of a p-group, Ω(G) and ℧(G)
- In group theory, Cayley's Ω process as a partial differential operator.
- In statistics, it is used as the symbol for the sample space, or total set of possible outcomes.
- In triangle geometry, Brocard points^[14]
- In number theory, Ω(n) is the number of prime divisors of n (counting multiplicity).^[15]
- In notation related to Big O notation to describe the asymptotic behavior of functions.^[16]
- Chaitin's constant.^[17]
- In set theory, the first uncountable ordinal number, ω₁ or Ω
- The absolute infinite proposed by Georg Cantor.
As part of a logo or trademark:
- The logo of Omega Watches SA^[18]
- Part of the original Pioneer logo^[19]
- Part of the Badge of the Supreme Court of the United Kingdom^[20]
- Part of the mission patch for STS-135, as it was the last mission of the Space Shuttle program^[21]
- The logo of the God of War video game series based on Greek mythology. In God of War (2018), it is revealed it stands as the symbol of war in Greece.
- The logo of E-123 Omega, a Sonic the Hedgehog character.
- The logo of the Heroes of Olympus series, based on Greek mythology.
- the logo of the Ultramarines in Warhammer 40,000
- The logo of Primal Groudon, the version mascot of Pokémon Omega Ruby.
- The logo of Darkseid in DC comics
- One of the logos of professional wrestler Kenny Omega
- The logo for Meow Wolf's Omega Mart in Area15, Las Vegas, Nevada
- The logo of Lalaji Memorial Omega International School

File:Fachada de Panteón de la Cruz.jpg

Omega-shaped entrance to the Panteón de la Cruz in Aguascalientes, representing the end of life^[22]

Other:
- In eschatology, the symbol for the end of everything
- In molecular biology, the symbol is used as shorthand to signify a genetic construct introduced by a two-point crossover
- Omega Particle in the Star Trek universe^[23]
- The final form of NetNavi bosses in some of the Mega Man Battle Network games
- A secret boss in the Final Fantasy series called Omega ( Ω ) Weapon.
- A character from the series Doctor Who called Omega, believed to be one of the creators of the Time Lords of Gallifrey.
- The symbol for the highest power level of a PSI attack in the Mother/EarthBound games
- A symbol used by U.S. citizens in the 1960s & 1970s to denote resistance to the U.S. war in Viet Nam. Adapted from the SI unit for electrical resistance.^[24]
- It is used along with Alpha in the Alpha and Omega, a Christian symbol.^[25]
- Used as the highest tier of equipment in the flash game, Learn to Fly
- Appears in galaxy quest as the Omega 13 device

The symbol ω (lowercase letter)

The minuscule letter ω is used as a symbol:

Biology, biochemistry and chemistry:
- In biochemistry, for one of the RNA polymerase subunits
- In biology, for fitness
- In chemistry, for denoting the carbon atom furthest from the carboxyl group of a fatty acid
- In genomics, as a measure of molecular evolution in protein-coding genes (also denoted as d_N/d_S or K_a/K_s ratio)
Physics:
- Angular velocity or angular frequency^[26]
- Rotation velocity (bold), rotational speed or frequency^[27]
- In computational fluid dynamics, the specific turbulence dissipation rate
- In meteorology, the change of pressure with respect to time of a parcel of air
- In circuit analysis and signal processing to represent angular frequency, related to frequency f by ω = 2πf
- In astronomy, as a ranking of a star's brightness within a constellation^[28]
- In orbital mechanics, as designation of the argument of periapsis of an orbit^[12]
- In particle physics to represent the omega meson^[29]
Computer science:
- In notation related to Big O notation, the asymptotically dominant nature of functions
- In relational database theory to represent NULL, a missing or inapplicable value
- In APL, to represent the right parameter to a function
Mathematics:
- The first and smallest transfinite ordinal number, often identified with the set of natural numbers including 0 (sometimes written $ω_{0}$ )^[30]^[31]
- In set theory, ω is the ordinal number^[32]
- A primitive root of unity, like the complex cube roots of 1
- The Wright Omega function^[33]
- A generic differential form
- In number theory, ω(n) is the number of distinct prime divisors of n^[34]
- In number theory, an arithmetic function
- In combinatory logic, the self-application combinator, (λ x. x x)
- In triangle geometry, a Brocard angle^[35]
- Clique number in Graph theory^[36]
Finance:
- In finance, the elasticity of options
- In analytical investment management, the tracking error of an investment manager
Other:
- Used in place of ん in Japanese typing shorthand.
- In linguistics, the phonological word
- In textual criticism, the archetype of a manuscript tradition
- In sociology, used to refer to the lowest ranking member of a group^[37]
- In economics (specifically like in general equilibrium theory), the endowments of agents
- In shift_JIS art, used to represent the cat's mouth. (e.g. Script error: No such module "Lang".)
- In actuarial sciences, used to represent the maximum life span that characterizes a mortality table^[38]

Unicode

Template:Notelist

References

↑ Template:Cite LPD
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↑ ^a ^b Anne Jeffery (1961), The Local Scripts of Archaic Greece, pp. 37–38.
↑ Herbert Weir Smyth A Greek Grammar for Colleges §1.
↑ Edward M. Thompson (1912), Introduction to Greek and Latin Paleography, Oxford: Clarendon, p. 144.
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↑ Unicode Code Charts: Greek and Coptic (Range: 0370-03FF)

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External links

[1] Template:Cite LPD

[2] Script error: No such module "citation/CS1".

[Jeffery37f-3] Anne Jeffery (1961), The Local Scripts of Archaic Greece, pp. 37–38.

[4] Herbert Weir Smyth A Greek Grammar for Colleges §1.

[5] Edward M. Thompson (1912), Introduction to Greek and Latin Paleography, Oxford: Clarendon, p. 144.

[geoENV2012-6] Script error: No such module "citation/CS1".

[7] Script error: No such module "Citation/CS1".

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[9] Excerpts from The Unicode Standard, Version 4.0. Retrieved 11 October 2006.

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[25] Template:CathEncy

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[39] Unicode Code Charts: Greek and Coptic (Range: 0370-03FF)

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@@ Line 5: / Line 5: @@
 {{More citations needed|date=December 2014}}
 {{Use dmy dates|date=April 2023}}
-{{Greek Alphabet|letter=omega}}'''Omega''' ({{IPAc-en|US|oʊ|ˈ|m|eɪ|ɡ|ə|,_|-|ˈ|m|ɛ|ɡ|ə|,_|-|ˈ|m|iː|ɡ|ə|audio=LL-Q1860 (eng)-Flame, not lame-Omega.wav}}, {{IPAc-en|UK|ˈ|oʊ|m|ɪ|ɡ|ə|}};<ref>{{cite LPD|3|omega}}</ref> <!-- <ref>{{OED|omega}}</ref><ref>{{cite Dictionary.com|omega}}</ref> -->uppercase '''Ω''', lowercase '''ω'''; [[Ancient Greek]] ὦ, later ὦ μέγα, [[Modern Greek]] ωμέγα) is the twenty-fourth and last letter in the [[Greek alphabet]]. In the [[Greek numerals|Greek numeric system]]/[[isopsephy]] ([[gematria]]), it has a value of 800. The word literally means "great&nbsp;O" (''o mega'', mega meaning "great"), as opposed to [[omicron]], which means "little&nbsp;O" (''o mikron'', mikron meaning "little").<ref>{{cite web |url=http://www.quinapalus.com/gr0.1.html |title=The Greek Alphabet }}</ref>
+{{Greek Alphabet|letter=omega}}'''Omega''' ({{IPAc-en|US|oʊ|ˈ|m|eɪ|ɡ|ə|,_|-|ˈ|m|ɛ|ɡ|ə|,_|-|ˈ|m|iː|ɡ|ə|audio=LL-Q1860 (eng)-Flame, not lame-Omega.wav}}, {{IPAc-en|UK|ˈ|oʊ|m|ɪ|ɡ|ə|}};<ref>{{cite LPD|3|omega}}</ref> <!-- <ref>{{OED|omega}}</ref><ref>{{cite Dictionary.com|omega}}</ref> -->uppercase '''Ω''', lowercase '''ω''') is the twenty-fourth and last letter in the [[Greek alphabet]]. In the [[Greek numerals|Greek numeric system]]/[[isopsephy]] ([[gematria]]), it has a value of 800. The name of the letter was originally {{lang|grc|ὦ}} ({{transliteration|grc|ō̂}} {{IPA|grc|ɔ̂ː|}}), but it was later changed to {{wikt-lang|grc|ὦ μέγα}} ({{transliteration|grc|ō̂ méga}} 'big o') in the Middle Ages to distinguish it from [[omicron]] {{angbr|{{lang|grc|ο}}}}, whose name means 'small o', as both letters had come to be pronounced {{IPA|grc-x-medieval|o|}}.<ref>{{cite web |url=http://www.quinapalus.com/gr0.1.html |title=The Greek Alphabet }}</ref> In [[modern Greek]], its name has fused into {{lang|el|ωμέγα}} ({{transliteration|el|oméga}}).
-In [[Phonetics|phonetic]] terms, the Ancient Greek Ω represented a [[vowel length|long]] [[open-mid back rounded vowel]] {{IPA|el|ɔː|IPA}}, comparable to the "aw" of the [[English language|English]] word ''raw'' in dialects without the [[cot–caught merger]], in contrast to [[omicron]], which represented the [[close-mid back rounded vowel]] {{IPA|el|o|IPA}}, and the [[digraph (orthography)|digraph]] ''ου'', which represented the [[vowel length|long]] [[close-mid back rounded vowel]] {{IPA|el|oː|IPA}}. In [[Modern Greek]], both omega and omicron represent the [[mid back rounded vowel]]<!-- not close-mid, see Arvanti (1999) - Illustrations of the IPA: Modern Greek. --> {{IPA|el|o̞|IPA}} or {{IPA|el|ɔ̝|IPA}}. The letter omega is [[transliteration|transliterated]] into a [[Latin-script alphabet]] as ''ō'' or simply ''o''.
+In [[Phonetics|phonetic]] terms, the Ancient Greek Ω represented a [[vowel length|long]] [[open-mid back rounded vowel]] {{IPA|grc|ɔː|}}, in contrast to [[omicron]], which represented the [[close-mid back rounded vowel]] {{IPA|grc|o|}}, and the [[digraph (orthography)|digraph]] {{angbr|{{lang|grc|ου}}}}, which represented the [[vowel length|long]] [[close back rounded vowel]] {{IPA|grc|uː|}}. In [[modern Greek]], both omega and omicron represent the [[mid back rounded vowel]]<!-- not close-mid, see Arvanti (1999) - Illustrations of the IPA: Modern Greek. --> {{IPA|el|o̞|}}. The letter omega is [[transliteration|transliterated]] into a [[Latin-script alphabet]] as {{transliteration|el|ō}} or simply {{transliteration|el|o}}.
 As the final letter in the Greek alphabet, omega is often used to denote the last, the end, or the ultimate limit of a [[set theory|set]], in contrast to [[Alpha (letter)|alpha]], the first letter of the Greek alphabet; see [[Alpha and Omega]].
@@ Line 18: / Line 18: @@
 In addition to the Greek alphabet, Omega was also adopted into the [[early Cyrillic alphabet]] (see [[omega (Cyrillic)|Cyrillic omega]] (Ѡ, ѡ)). A [[Raetic alphabet|Raetic]] variant is conjectured to be at the origin or parallel evolution of the [[Elder Futhark]] [[ᛟ]].
-Omega was also adopted into the Latin alphabet, as a letter of the 1982 revision to the [[African reference alphabet]]. It's in sparse use (see [[Latin omega]]).
+Omega was also adopted into the Latin alphabet, as a letter of the 1982 revision to the [[African reference alphabet]]. It is in sparse use (see [[Latin omega]]).
 == The symbol Ω (uppercase letter) ==
@@ Line 30: / Line 30: @@
 ** For [[ohm]] – SI unit of electrical resistance.<ref>{{Cite web |date=2025-01-03 |title=Ohm {{!}} Electricity, Resistance & Voltage {{!}} Britannica |url=https://www.britannica.com/science/ohm |access-date=2025-02-08 |website=www.britannica.com |language=en}}</ref> Unicode has a separate code point {{unichar|2126|OHM SIGN}} ([[HTML entity]] <code>&amp;ohm;</code>), but it is included only for backward compatibility, and the canonically equivalent code point {{unichar|03A9|GREEK CAPITAL LETTER OMEGA}} (<code>&amp;Omega;</code>) is preferred. Also formerly also used upside down ({{unichar|2127|INVERTED OHM SIGN}}) to represent [[mho]], the old name for the inverse of an ohm (now siemens with symbol S), the SI unit of electrical conductance.<ref>Excerpts from ''[https://www.unicode.org/versions/Unicode4.0.0/ch07.pdf#search=%22character%20U%2B2126%20maps%20OR%20map%20OR%20mapping%22 The Unicode Standard, Version 4.0]''. Retrieved 11 October 2006.</ref>
 ** In [[statistical mechanics]], Ω refers to the multiplicity (number of microstates) in a system.
-** The [[solid angle]]<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Solid Angle |url=https://mathworld.wolfram.com/SolidAngle.html |access-date=2025-02-07 |website=mathworld.wolfram.com |language=en |quote=The solid angle Ω subtended by a surface S is defined as the surface area Ω of a unit sphere covered by the surface's projection onto the sphere.}}</ref> or the rate of precession in a gyroscope
+** The [[solid angle]]<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Solid Angle |url=https://mathworld.wolfram.com/SolidAngle.html |access-date=2025-02-07 |website=mathworld.wolfram.com |language=en |quote=The solid angle Ω subtended by a surface S is defined as the surface area Ω of a unit sphere covered by the surface's projection onto the sphere.}}</ref><ref>{{Cite journal|last=Braslavsky|first=S. E.|date=2007-01-01|title=Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)|journal=Pure and Applied Chemistry|volume=79|issue=3|page=454|doi=10.1351/pac200779030293|s2cid=96601716 |issn=1365-3075|doi-access=free|quote=solid angle Ω }}</ref> or the rate of precession in a gyroscope
 ** In particle physics to represent the [[Omega baryon]]s
 ** In astronomy (cosmology), Ω refers to the average density of the universe, also called the [[density parameter]].
-** In astronomy (orbital mechanics), Ω refers to the [[longitude of the ascending node]] of an orbit.
+** In astronomy (orbital mechanics), Ω refers to the [[longitude of the ascending node]] of an orbit.<ref name=":0">{{Cite web |title=Frequently Asked Questions (FAQs) |url=https://ssd.jpl.nasa.gov/faq.html |archive-url=http://web.archive.org/web/20250729033509/https://ssd.jpl.nasa.gov/faq.html |archive-date=2025-07-29 |access-date=2025-09-25 |website=ssd.jpl.nasa.gov |language=en |quote=The point S represents the sun, P represents perihelion, i is the inclination, lower case omega (ω) is the argument of perihelion, and upper case omega (Ω) is the longitude of the ascending node.}}</ref>
 * In [[mathematics]] and [[computer science]]:
 ** In complex analysis, the [[Omega constant]], a solution of Lambert's W function<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Omega Constant |url=https://mathworld.wolfram.com/OmegaConstant.html |access-date=2025-01-18 |website=mathworld.wolfram.com |language=en}}</ref>
@@ Line 45: / Line 45: @@
 ** In [[triangle geometry]], [[Brocard points]]<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Brocard Points |url=https://mathworld.wolfram.com/BrocardPoints.html |access-date=2025-02-07 |website=mathworld.wolfram.com |language=en}}</ref>
 ** In [[number theory]], [[Prime omega function|Ω(''n'')]] is the number of [[prime divisor]]s of ''n'' (counting [[Multiplicity (mathematics)|multiplicity]]).<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Prime Factor |url=https://mathworld.wolfram.com/PrimeFactor.html |website=mathworld.wolfram.com |access-date=12 August 2020 }}</ref>
-** In notation related to [[Big O notation]] to describe the asymptotic behavior of functions.
+** In notation related to [[Big O notation]] to describe the asymptotic behavior of functions.<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Big-Omega Notation |url=https://mathworld.wolfram.com/Big-OmegaNotation.html |access-date=2025-09-25 |website=mathworld.wolfram.com |language=en}}</ref>
-** [[Chaitin's constant]].
+** [[Chaitin's constant]].<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Chaitin's Constant |url=https://mathworld.wolfram.com/ChaitinsConstant.html |access-date=2025-09-25 |website=mathworld.wolfram.com |language=en}}</ref>
 ** In [[set theory]], the [[first uncountable ordinal|first uncountable ordinal number]], ω<sub>1</sub> or Ω
 ** The [[absolute infinite]] proposed by [[Georg Cantor]].
 * As part of a logo or trademark:
-** The logo of [[Omega Watches]] SA<ref>{{Cite web|url=https://www.hallandladdco.com/blogs/interesting-articles/the-history-of-the-omega-watch-company|title=The History Of The Omega Watch Company|website=HallandLaddco|language=en|access-date=2019-02-02|archive-date=March 19, 2020|archive-url=https://web.archive.org/web/20200319035901/https://www.hallandladdco.com/blogs/interesting-articles/the-history-of-the-omega-watch-company|url-status=dead}}</ref>
+** The logo of [[Omega Watches]] SA<ref>{{Cite web|url=https://www.hallandladdco.com/blogs/interesting-articles/the-history-of-the-omega-watch-company|title=The History Of The Omega Watch Company|website=HallandLaddco|language=en|access-date=2019-02-02|archive-date=March 19, 2020|archive-url=https://web.archive.org/web/20200319035901/https://www.hallandladdco.com/blogs/interesting-articles/the-history-of-the-omega-watch-company|url-status=usurped}}</ref>
 ** Part of the original [[Pioneer Corporation|Pioneer]] logo<ref>{{Cite web |title=Pioneer Logo, symbol, meaning, history, PNG, brand |url=https://logos-world.net/pioneer-logo/ |access-date=2025-02-08 |language=en-US |quote=The logo features a tuning fork surrounded by the Greek letter Omega.}}</ref>
 ** Part of the [[Supreme Court of the United Kingdom|Badge of the Supreme Court]] of the United Kingdom<ref>{{Cite web |date=2022-05-07 |title=Emblem of the Supreme Court - Herald Art |url=https://heraldart.co.uk/emblem-of-the-supreme-court/ |access-date=2025-02-08 |language=en-GB |quote=The emblem shows the plant badges of England and Wales, Scotland and Northern Ireland surrounded by Omega the ultimate letter in the Greek alphabet.}}</ref>
@@ Line 74: / Line 74: @@
 ** The symbol for the highest power level of a [[Psionics|PSI]] attack in the ''[[Mother (video game series)|Mother]]/[[EarthBound]]'' games
 ** A symbol used by U.S. citizens in the 1960s & 1970s to denote resistance to the U.S. war in Viet Nam. Adapted from the SI unit for electrical resistance.<ref>{{cite web | url=http://www.substancenews.net/articles.php?page=6592 | title=Resistance should begin now - Substance News }}</ref>
-** It's used along with [[Alpha]] in the [[Alpha and Omega]], a Christian symbol.<ref>{{CathEncy|wstitle= A and Ω |volume= 1 |page= 332 |last= Hassett |first= M.M. |author-link= |year=1913|short= 1}}</ref>
+** It is used along with [[Alpha]] in the [[Alpha and Omega]], a Christian symbol.<ref>{{CathEncy|wstitle= A and Ω |volume= 1 |page= 332 |last= Hassett |first= M.M. |author-link= |year=1913|short= 1}}</ref>
 ** Used as the [[Rank|highest tier]] of equipment in the [[Browser game|flash game]], Learn to Fly
 ** Appears in [[Galaxy Quest|galaxy quest]] as the [[Omega 13 device]]
@@ Line 91: / Line 91: @@
 ** In [[meteorology]], the change of pressure with respect to time of a [[Fluid parcel|parcel]] of air
 ** In [[circuit analysis]] and [[signal processing]] to represent [[angular frequency]], related to [[frequency]] ''f'' by ω = 2π''f''
-** In [[astronomy]], as a ranking of a star's brightness within a constellation
+** In [[astronomy]], as a ranking of a star's brightness within a constellation<ref>{{Cite web |last=Flanders |first=Tony |date=2007-02-02 |title=The Greek Alphabet |url=https://skyandtelescope.org/astronomy-resources/the-greek-alphabet/ |access-date=2025-09-25 |website=Sky & Telescope |language=en-US |quote=Stars within a constellation are usually lettered from Alpha (α) to Omega (ω) roughly in order of brightness, but there are numerous exceptions.}}</ref>
-** In [[orbital mechanics]], as designation of the [[argument of periapsis]] of an orbit
+** In [[orbital mechanics]], as designation of the [[argument of periapsis]] of an orbit<ref name=":0" />
 ** In [[particle physics]] to represent the [[Meson|omega meson]]<ref>{{cite journal |last=Maglich |first=B. |date=1976 |title=Discovery of omega meson-first neutral vector meson: one researcher's account - Discovery story |url=https://inspirehep.net/files/bed57fc443ad4a089648fd0574f4d256 |journal=Advanced Experimental Physics |volume=5 |pages=79–105 |quote=Omega Meson Observed (page 97)}}</ref>
 * Computer science:

Omega: Difference between revisions

Revision as of 06:08, 12 November 2025

Contents

History

The symbol Ω (uppercase letter)

The symbol ω (lowercase letter)

Unicode

References

External links

Navigation menu

Omega: Difference between revisions

Revision as of 06:08, 12 November 2025

History

The symbol Ω (uppercase letter)

The symbol ω (lowercase letter)

Unicode

References

External links

Navigation menu

Search