Brahmagupta
E449902
Brahmagupta was a pioneering 7th-century Indian mathematician and astronomer renowned for formalizing rules for zero, negative numbers, and solving quadratic equations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Brahmagupta canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4512352 — 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: Brahmagupta Context triple: [Ancient India, mathematician, Brahmagupta]
-
A.
Aryabhata
Aryabhata was an ancient Indian mathematician and astronomer renowned for pioneering work in arithmetic, algebra, trigonometry, and astronomical calculations, including an early approximation of π and insights into the Earth's rotation.
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B.
Varahamihira
Varahamihira was a renowned 6th-century Indian astronomer, astrologer, and mathematician whose works, such as the Brihat Samhita, became foundational texts in classical Indian science.
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C.
Madhava
Madhava is a revered epithet of the Hindu god Vishnu, highlighting him as the consort of Lakshmi and the supreme preserver of the universe.
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D.
Al-Khwarizmi
Al-Khwarizmi was a pioneering Persian mathematician and astronomer whose works on algebra and algorithms profoundly shaped the development of mathematics and science.
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E.
Zīj al-Sindhind
Zīj al-Sindhind is an influential early 9th-century astronomical handbook and set of tables by Al-Khwarizmi that helped introduce and adapt Indian and Persian astronomical methods to the Islamic world.
- 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: Brahmagupta Target entity description: Brahmagupta was a pioneering 7th-century Indian mathematician and astronomer renowned for formalizing rules for zero, negative numbers, and solving quadratic equations.
-
A.
Aryabhata
Aryabhata was an ancient Indian mathematician and astronomer renowned for pioneering work in arithmetic, algebra, trigonometry, and astronomical calculations, including an early approximation of π and insights into the Earth's rotation.
-
B.
Varahamihira
Varahamihira was a renowned 6th-century Indian astronomer, astrologer, and mathematician whose works, such as the Brihat Samhita, became foundational texts in classical Indian science.
-
C.
Madhava
Madhava is a revered epithet of the Hindu god Vishnu, highlighting him as the consort of Lakshmi and the supreme preserver of the universe.
-
D.
Al-Khwarizmi
Al-Khwarizmi was a pioneering Persian mathematician and astronomer whose works on algebra and algorithms profoundly shaped the development of mathematics and science.
-
E.
Zīj al-Sindhind
Zīj al-Sindhind is an influential early 9th-century astronomical handbook and set of tables by Al-Khwarizmi that helped introduce and adapt Indian and Persian astronomical methods to the Islamic world.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Indian astronomer
ⓘ
Indian mathematician ⓘ astronomer ⓘ human ⓘ mathematician ⓘ |
| birthPlace |
Bhinmal
NERFINISHED
ⓘ
Gurjaradesa NERFINISHED ⓘ Rajasthan NERFINISHED ⓘ |
| birthYear | 598 ⓘ |
| countryOfCitizenship | India ⓘ |
| deathYear | 668 ⓘ |
| developed |
area formula for cyclic quadrilaterals
ⓘ
general solutions of quadratic equations ⓘ methods for astronomical calculations ⓘ rules for computing with negative numbers ⓘ rules for computing with zero ⓘ |
| era | 7th century ⓘ |
| ethnicGroup | Indian ⓘ |
| fieldOfWork |
algebra
ⓘ
astronomy ⓘ geometry ⓘ mathematics ⓘ number theory ⓘ |
| influenced |
Bhāskara II
NERFINISHED
ⓘ
later Islamic mathematicians ⓘ medieval European mathematicians ⓘ |
| influencedBy | Āryabhaṭa NERFINISHED ⓘ |
| knownFor |
Brahmagupta–Fibonacci identity
NERFINISHED
ⓘ
Brahmagupta’s formula for cyclic quadrilaterals ⓘ Brahmagupta’s interpolation formula NERFINISHED ⓘ Brahmagupta’s theorem NERFINISHED ⓘ early use of zero as a number ⓘ formalizing rules for zero ⓘ methods for solving Pell-type equations ⓘ rules for arithmetic with zero ⓘ rules for negative numbers ⓘ rules for operations with positive and negative numbers ⓘ solutions of quadratic equations ⓘ work on Diophantine equations ⓘ |
| languageOfWork | Sanskrit NERFINISHED ⓘ |
| name | Brahmagupta NERFINISHED ⓘ |
| notableWork |
Brāhmasphuṭasiddhānta
NERFINISHED
ⓘ
Khaṇḍakhādyaka NERFINISHED ⓘ |
| occupation |
astronomer
ⓘ
mathematician ⓘ |
| position | head of astronomical observatory at Ujjain ⓘ |
| regionOfActivity |
Indian subcontinent
NERFINISHED
ⓘ
Ujjain NERFINISHED ⓘ |
| religion | Hinduism ⓘ |
| tradition | Indian mathematical astronomy ⓘ |
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: Brahmagupta Description of subject: Brahmagupta was a pioneering 7th-century Indian mathematician and astronomer renowned for formalizing rules for zero, negative numbers, and solving quadratic equations.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Ancient India