Upsilon
E107159
Upsilon is a letter of the Greek alphabet that historically represented a "u" or "y" vowel sound and is used in various scientific and mathematical contexts.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Upsilon canonical | 1 |
| upsilon meson | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T898817 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Upsilon Context triple: [Greek alphabet, hasLetter, Upsilon]
-
A.
Zeta
Zeta is the sixth letter of the Greek alphabet, corresponding roughly to the English "z" sound.
-
B.
Iota
Iota is the ninth letter of the Greek alphabet, historically representing a short "i" sound and giving rise to the Latin letter I.
-
C.
Gimel
Gimel is the third letter of the Hebrew alphabet, traditionally associated with the "g" sound and rich symbolic meanings in Jewish mysticism and tradition.
-
D.
Yod
Yod is the tenth and one of the smallest letters of the Hebrew alphabet, often associated with the concept of divine presence and the starting point of many Hebrew words and names.
-
E.
Zayin
Zayin is the seventh letter of the Hebrew alphabet, traditionally associated with the "z" sound and rich symbolic meanings in Jewish mysticism and scripture.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Upsilon Target entity description: Upsilon is a letter of the Greek alphabet that historically represented a "u" or "y" vowel sound and is used in various scientific and mathematical contexts.
-
A.
Zeta
Zeta is the sixth letter of the Greek alphabet, corresponding roughly to the English "z" sound.
-
B.
Iota
Iota is the ninth letter of the Greek alphabet, historically representing a short "i" sound and giving rise to the Latin letter I.
-
C.
Gimel
Gimel is the third letter of the Hebrew alphabet, traditionally associated with the "g" sound and rich symbolic meanings in Jewish mysticism and tradition.
-
D.
Yod
Yod is the tenth and one of the smallest letters of the Hebrew alphabet, often associated with the concept of divine presence and the starting point of many Hebrew words and names.
-
E.
Zayin
Zayin is the seventh letter of the Hebrew alphabet, traditionally associated with the "z" sound and rich symbolic meanings in Jewish mysticism and scripture.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Greek letter
ⓘ
alphabetic character ⓘ symbol ⓘ |
| category | vowel letter ⓘ |
| derivedFrom | Phoenician letter Waw ⓘ |
| follows | Tau ⓘ |
| hasAlphabeticOrder | 20 ⓘ |
| hasDiacriticForms |
ΰ
ⓘ
ϋ ⓘ ὑ ⓘ ὕ ⓘ |
| hasLatinEquivalent |
V
ⓘ
Y ⓘ |
| hasLowercaseForm | υ ⓘ |
| hasNameInGreek |
Ύψιλον
ⓘ
ύψιλον ⓘ |
| hasNumericValueInGreekNumerals | 400 ⓘ |
| hasTransliteration |
u
ⓘ
ū ⓘ y ⓘ |
| hasUppercaseForm | Υ ⓘ |
| influenced |
Latin letter U
ⓘ
Latin letter V ⓘ Latin letter W ⓘ Latin letter Y ⓘ |
| ISOBasicLatinDerivative | Y ⓘ |
| memberOf | Greek alphabet ⓘ |
| precedes | Phi ⓘ |
| representsSoundHistorically |
close back rounded vowel /u/
ⓘ
front rounded vowel /y/ ⓘ |
| representsSoundInModernGreek | /i/ ⓘ |
| script | Greek script ⓘ |
| UnicodeCodePointLowercase | U+03C5 ⓘ |
| UnicodeCodePointUppercase | U+03A5 ⓘ |
| usedAsSymbolFor |
cumulative distribution functions or related quantities in statistics (occasionally)
ⓘ
displacement or deflection in mechanics (occasionally) ⓘ eigenvalues or spectral parameters in mathematics (occasionally) ⓘ hypothetical particles in particle physics ⓘ potential energy in some physics texts ⓘ specific types of baryons or resonances ⓘ Upsilon self-linksurface differs ⓘ
surface form:
upsilon meson
|
| usedIn |
astronomy
ⓘ
biology ⓘ chemistry ⓘ linguistics ⓘ mathematics ⓘ physics ⓘ statistics ⓘ |
| usedSince | Classical Greek period ⓘ |
| writingSystem | Greek ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Upsilon Description of subject: Upsilon is a letter of the Greek alphabet that historically represented a "u" or "y" vowel sound and is used in various scientific and mathematical contexts.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
upsilon meson