[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [A History of the Kerala School of Hindu Astronomy (in Perspective)](https://indike.org/pramana/ins.science.sarma-1972) › c8.s2.12 # A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s2.12 A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s2.12 - **Language:** English ### [c8.s2.12](https://indike.org/pramana/ins.science.sarma-1972.c8.s2.12) The actual date of composition of the \*Sphuṭanirṇaya\*, which is the earliest work to enunciate the reduction formula, is not known, but it is definitely before 1583 which is the date of composition of the \*Uparāgakriyākrama\* which contains the simplified formula.² - [Previous: c8.s2.11](https://indike.org/pramana/ins.science.sarma-1972.c8.s2.11) - [Next: c8.s2.13](https://indike.org/pramana/ins.science.sarma-1972.c8.s2.13) - [Up: c8.s2](https://indike.org/pramana/ins.science.sarma-1972.c8.s2) ## Linked texts (1) - [Sphuṭanirṇaya](https://indike.org/pramana/in.astro.kerala.sphuta.sphutanirnaya) — Acyuta Piṣāraṭi 1570, Sanskrit --- Source: [https://indike.org/pramana/ins.science.sarma-1972.c8.s2.12](https://indike.org/pramana/ins.science.sarma-1972.c8.s2.12) · Pramāṇa