出典:Wiktionary
出典:『Wiktionary』 (2025/12/22 14:04 UTC 版)
Lalla (plural Lallas)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/07 10:07 UTC 版)
Lalla (c. 720–790 CE) was an Indian mathematician, astronomer, and astrologer who belonged to a family of astronomers. His most famous work was titled Śiṣya-dhī-vṛddhida-tantra, or "Treatise which expands the intellect of students." He is also known for having published the earliest known description of a perpetuum mobile in Śiṣyadhīvṛddhidatantra.