Sigma
E514349
Sigma is a Greek letter commonly used in mathematics, science, and engineering to denote summation, standard deviation, and various other concepts.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T5363425 — 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: Sigma Context triple: [Nunki, BayerLetter, Sigma]
-
A.
Sigma
Sigma is a rural municipality in the province of Capiz in the Western Visayas region of the Philippines, known for its agricultural economy and small-town character.
-
B.
Sus
Sus is a genus of mammals in the pig family that includes domestic pigs and several species of wild boar.
-
C.
Suge
"Suge" is a breakout 2019 hip-hop single by DaBaby known for its aggressive delivery, catchy hook, and viral music video.
-
D.
Sununu
Sununu is a prominent American political family name most notably associated with former New Hampshire Governor and White House Chief of Staff John H. Sununu and his son, Governor Chris Sununu.
-
E.
Sikma
Sikma is a surname most notably associated with Jack Sikma, a Hall of Fame American basketball player known for his successful NBA career with the Seattle SuperSonics.
- 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: Sigma Target entity description: Sigma is a Greek letter commonly used in mathematics, science, and engineering to denote summation, standard deviation, and various other concepts.
-
A.
Sigma
Sigma is a rural municipality in the province of Capiz in the Western Visayas region of the Philippines, known for its agricultural economy and small-town character.
-
B.
Sus
Sus is a genus of mammals in the pig family that includes domestic pigs and several species of wild boar.
-
C.
Suge
"Suge" is a breakout 2019 hip-hop single by DaBaby known for its aggressive delivery, catchy hook, and viral music video.
-
D.
Sununu
Sununu is a prominent American political family name most notably associated with former New Hampshire Governor and White House Chief of Staff John H. Sununu and his son, Governor Chris Sununu.
-
E.
Sikma
Sikma is a surname most notably associated with Jack Sikma, a Hall of Fame American basketball player known for his successful NBA career with the Seattle SuperSonics.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Greek letter
ⓘ
letter of the Greek alphabet ⓘ |
| belongsTo | Greek script ⓘ |
| denotes |
Pauli matrices (σx, σy, σz)
ⓘ
linked to:
Pauli matrices
Stefan–Boltzmann constant (σ) ⓘ
linked to:
Stefan–Boltzmann constant
Weierstrass sigma function (σ) ⓘ
linked to:
Weierstrass elliptic functions
alphabet in formal language theory (Σ) ⓘ covariance matrix (uppercase Σ) ⓘ cross section in physics ⓘ electrical conductivity (σ) ⓘ normal distribution standard deviation (σ) ⓘ normal stress (σ) ⓘ sigma bond in chemistry (σ bond) ⓘ sigma notation for series (Σ) ⓘ sigma-algebra in measure theory (σ) ⓘ standard deviation ⓘ stress (mechanics) ⓘ sum of divisors function in number theory (σ) ⓘ summation ⓘ surface charge density ⓘ |
| hasAlphabetPosition | 18 ⓘ |
| hasFinalLowercaseForm | ς ⓘ |
| hasLowercaseForm | σ ⓘ |
| hasNameInGreek |
Σίγμα
ⓘ
linked to:
Sigma
|
| hasPhoneticValue | /s/ ⓘ |
| hasUnicodeCodePoint |
U+03A3
ⓘ
U+03C2 ⓘ U+03C3 ⓘ |
| hasUppercaseForm | Σ ⓘ |
| relatedTo |
Cyrillic letter С
ⓘ
Latin letter S ⓘ |
| scriptVariant |
𝚺
ⓘ
𝛔 ⓘ 𝛴 ⓘ 𝜮 ⓘ 𝝈 ⓘ 𝝨 ⓘ 𝞂 ⓘ 𝞢 ⓘ 𝞼 ⓘ |
| transliteratedAs | S ⓘ |
| usedIn |
computer science
ⓘ
engineering ⓘ mathematics ⓘ physics ⓘ statistics ⓘ |
| writingSystem | Greek alphabet ⓘ |
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: Sigma Description of subject: Sigma is a Greek letter commonly used in mathematics, science, and engineering to denote summation, standard deviation, and various other concepts.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.