# Author:Srinivasa Ramanujan

←Author Index: Ra | Srinivasa Ramanujan (1887–1920) |

Indian mathematician and one of the mathematical geniuses of the twentieth century |

## WorksEdit

- Algebraic relations between certain infinite products (1919) (transcription project)
- Congruence properties of partitions (1919, published in 1921)
- On the expression of a number in the form 𝑎𝑥²+𝑏𝑦²+𝑐𝑧²+𝑑𝑢² (1920)
- Squaring the circle (1913)

Works by this author published before January 1, 1926 are in the **public domain** worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.

Some or all works by this author are in the **public domain in India** because it originates from India and its term of copyright has expired. According to The Indian Copyright Act, 1957, all documents enter the public domain after sixty years counted from the beginning of the following calendar year (ie. as of 2021, prior to 1 January 1961) after the death of the author.

Some or all works by this author are also in the public domain **in the U.S.A.** because it was in the public domain in India in 1996, and no copyright was registered in the U.S.A. (This is the combined effect of India's joining the Berne Convention in 1928, and of 17 USC 104A with its critical date of January 1, 1996.)