A. A. Krishnaswami Ayyangar (1892–1953) was a

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

from India. He got his M.A. in Mathematics at the age of 18 from

Pachaiyappa's College Pachaiyappa's College is one of the oldest educational institutions in Chennai, in the South Indian state of Tamil Nadu. In addition, it is the first sole Indian college in Madras Presidency. History Pachaiyappa's College, Chennai is the resul ...

and subsequently started teaching mathematics there. In 1918, he joined the mathematics department of the

University of Mysore The University of Mysore is a public state university in Mysore, Karnataka, India. The university was founded during the reign of Krishnaraja Wadiyar IV, the Maharaja of Mysore. The university is recognised by the University Grants Commission ...

and retired from there in 1947. He was born in a

Tamil Tamil may refer to: * Tamils, an ethnic group native to India and some other parts of Asia **Sri Lankan Tamils, Tamil people native to Sri Lanka also called ilankai tamils **Tamil Malaysians, Tamil people native to Malaysia * Tamil language, nativ ...

Brahmin Brahmin (; sa, ब्राह्मण, brāhmaṇa) is a varna as well as a caste within Hindu society. The Brahmins are designated as the priestly class as they serve as priests (purohit, pandit, or pujari) and religious teachers (gur ...

family. He died in June 1953. He is the father of the Kannada poet and scholar

A. K. Ramanujan Attipate Krishnaswami Ramanujan (16 March 1929 – 13 July 1993) was an Indian poet and scholar of Indian literature and Linguistics. Ramanujan was also a professor of Linguistics at University of Chicago. Ramanujan was a poet, scholar, ...

Works

Ayyangar wrote an article on the

Chakravala method The ''chakravala'' method ( sa, चक्रवाल विधि) is a cyclic algorithm to solve indeterminate quadratic equations, including Pell's equation. It is commonly attributed to Bhāskara II, (c. 1114 – 1185 CE)Hoiberg & Ramchandani ...

and showed how the method differs from the method of

continued fraction In mathematics, a continued fraction is an expression obtained through an iterative process of representing a number as the sum of its integer part and the reciprocal of another number, then writing this other number as the sum of its integer ...

s. He recounted that this point was missed by André Weil, who thought that the Chakravala method was only an "experimental fact" to the Indians and attributed general proofs to

Pierre de Fermat Pierre de Fermat (; between 31 October and 6 December 1607 – 12 January 1665) was a French mathematician who is given credit for early developments that led to infinitesimal calculus, including his technique of adequality. In particular, he ...

and Joseph-Louis Lagrange. Professor

Subhash Kak Subhash Kak is an Indian-American computer scientist and historical revisionist. He is the Regents Professor of Computer Science Department at Oklahoma State University–Stillwater, an honorary visiting professor of engineering at Jawaharlal N ...

Louisiana State University Louisiana State University (officially Louisiana State University and Agricultural and Mechanical College, commonly referred to as LSU) is a public land-grant research university in Baton Rouge, Louisiana. The university was founded in 1860 nea ...

, Baton Rouge first noted that Ayyangar's presentations of Indian works were unique, and was instrumental in bringing it to the notice of the scientific community.

References

External links

Brief life and some papers
* {{DEFAULTSORT:Ayyangar, A. A. Krishnaswami 1892 births 1953 deaths 20th-century Indian mathematicians Academic staff of the University of Mysore Scientists from Karnataka