Tau
E472765
Tau is the 19th letter of the Greek alphabet, commonly used as a symbol in mathematics, physics, and engineering.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Tau canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4814717 — 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: Tau Context triple: [Upsilon, follows, Tau]
-
A.
Tau Sug
Tau Sug are an ethnolinguistic group of the southern Philippines, particularly in the Sulu Archipelago, known for their seafaring traditions, distinct Austronesian language, and rich Islamic cultural heritage.
-
B.
Tio
Tio is a coastal town in Eritrea’s Southern Red Sea Region, known historically as a small port on the Red Sea.
-
C.
Nesta
Nesta is the middle name of legendary Jamaican reggae musician and cultural icon Bob Marley.
-
D.
Neste
Neste is a Finnish oil refining and renewable fuels company known for producing sustainable diesel and aviation fuels.
-
E.
Tan
Tan is a surname and given name commonly found in various East and Southeast Asian cultures, often representing a romanization of different Chinese family names.
- 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: Tau Target entity description: Tau is the 19th letter of the Greek alphabet, commonly used as a symbol in mathematics, physics, and engineering.
-
A.
Tau Sug
Tau Sug are an ethnolinguistic group of the southern Philippines, particularly in the Sulu Archipelago, known for their seafaring traditions, distinct Austronesian language, and rich Islamic cultural heritage.
-
B.
Tio
Tio is a coastal town in Eritrea’s Southern Red Sea Region, known historically as a small port on the Red Sea.
-
C.
Nesta
Nesta is the middle name of legendary Jamaican reggae musician and cultural icon Bob Marley.
-
D.
Neste
Neste is a Finnish oil refining and renewable fuels company known for producing sustainable diesel and aviation fuels.
-
E.
Tan
Tan is a surname and given name commonly found in various East and Southeast Asian cultures, often representing a romanization of different Chinese family names.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
Greek letter
ⓘ
alphabetic character ⓘ |
| alphabetFamily | Phoenician-derived alphabets ⓘ |
| follows | Sigma ⓘ |
| hasLowercaseForm | τ ⓘ |
| hasNameInGreek | Ταυ ⓘ |
| hasNumericValueInGreekNumerals | 300 ⓘ |
| hasPronunciation | /taʊ/ ⓘ |
| hasTransliteration | tau ⓘ |
| hasUnicodeCodePointLowercase | U+03C4 ⓘ |
| hasUnicodeCodePointUppercase | U+03A4 ⓘ |
| hasUnicodeNameLowercase | GREEK SMALL LETTER TAU ⓘ |
| hasUnicodeNameUppercase | GREEK CAPITAL LETTER TAU ⓘ |
| hasUppercaseForm | Τ ⓘ |
| memberOf | Greek alphabet ⓘ |
| positionInAlphabet | 19 ⓘ |
| precedes | Upsilon ⓘ |
| relatedTo |
Cyrillic letter Te
ⓘ
Latin letter T ⓘ |
| scriptSystem | Greek script ⓘ |
| symbolType |
constant symbol
ⓘ
physical quantity symbol ⓘ variable symbol ⓘ |
| usedAsSymbolFor |
Kendall rank correlation coefficient
ⓘ
circle constant 2π ⓘ golden ratio conjugate ⓘ mean lifetime in particle physics ⓘ proper time in relativity ⓘ shear stress ⓘ tau function in number theory ⓘ tau lepton ⓘ time constant in RC circuits ⓘ topological type in mathematics ⓘ torque ⓘ |
| usedIn |
engineering
ⓘ
mathematics ⓘ physics ⓘ |
| usedInField |
electrical engineering
ⓘ
mechanical engineering ⓘ particle physics ⓘ statistics ⓘ topology ⓘ |
| writingDirection | left-to-right ⓘ |
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: Tau Description of subject: Tau is the 19th letter of the Greek alphabet, commonly used as a symbol in mathematics, physics, and engineering.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.