TY - BOOK AU - S. P. Deśpāṇḍe TI - Concept of zero T2 - Popular Science SN - 9788123780481 (PB) U1 - 513.5 DES(CON) PY - 2017/// PB - National book trust KW - Mathematics, Ancient KW - Brahmagupta, active 7th century – Hindu mathematics ER -