[Pramāṇa](https://indike.org/pramana/) › [Indian literature](https://indike.org/pramana/in) › [Astronomy & Mathematics](https://indike.org/pramana/in.astro) › [Mathematical Astronomy](https://indike.org/pramana/in.astro.siddhanta) › [Later siddhāntas and Sūryasiddhānta-based treatises](https://indike.org/pramana/in.astro.siddhanta.later) › Siddhantasamgraha (Acala Upadhyaya) # Siddhantasamgraha (Acala Upadhyaya) (Siddhāntasaṃgraha (Acala Upādhyāya)) सिद्धान्तसंग्रह (अचल उपाध्याय) - **Language:** Sanskrit - **Date:** 1725–1775 CE - **Author:** [Acala Upādhyāya](https://indike.org/pramana/person/acala-upadhyaya) - **Text:** not yet digitised (catalogue entry) --- Source: [https://indike.org/pramana/in.astro.siddhanta.later.siddhantasamgraha-acala-misra](https://indike.org/pramana/in.astro.siddhanta.later.siddhantasamgraha-acala-misra) · Pramāṇa