What is "lalla"

Lalla ( 720–790 CE) was an Indian mathematician, astronomer, and astrologer who belonged to a family of astronomers. Lalla was the son of Trivikrama Bhatta and the grandson of Śâmba, and he lived in central India, possibly in the Lāṭa region in modern south Gujarat. Lalla was known as being one of the leading Indian astronomers during the eighth century. Only two of Lalla's works are currently thought to be extant.

His most famous work was titled Śiṣya-dhī-vṛddhida-tantra, or "Treatise which expands the intellect of students." This text is one of the first major Sanskrit astronomical texts known from the period following the 7th-century works of Brahmagupta and Bhāskara I. It generally treats the same astronomical subject matter and demonstrates the same computational techniques as earlier authors, although there are some significant innovations, such that Lalla’s treatise offers a compromise between the rival astronomical schools of his predecessors, Āryabhaṭa I and Brahmagupta. Although Lalla is known to be a follower of Āryabhaṭa, he combines techniques from both. It is within "Śiṣyadhīv ṛddhidatantra" that the earliest known description of a perpetuum mobile is described.

Lalla's other works such as his text, " Jyotiṣaratnakośa" or "Treasury of Jewels", is his treatise on catarchic astrology. This work is one of the earliest known Sanskrit astrological works for determining auspicious and inauspicious times. No edition of this text has ever been published while the known manuscripts are incomplete.

In his work, Lalla drew on his predecessors Āryabhaṭa, Brahmagupta, and Bhāskara I. In turn, he influenced later generations of astronomers, including Śrīpati, Vaṭeśvara, and Bhāskara II (who later wrote a commentary on the Śiṣyadhīvṛddhidatantra).

He followed the Ārya-pakṣa or the school of Āryabhaṭa (continued by Bhāskara I), but divided the mahāyuga the traditional way, following the Brāhma-pakṣa school of Brahmagupta. Although he followed Āryabhaṭa, he did not believe in the rotation of the Earth.

Lalla (c. 720–790), was an Indian mathematician and astronomer

Lalla may also refer to:

• Lalla (title), Arabic title of respect
• Lalla of Arneae (fl. c. 80 – c. 100), Graeco-Roman civic benefactor
• Lalla Latifa (born 1945 or 1946), mother of current King of Morocco
• Princess Lalla Salma of Morocco (born 1978 as Salma Bennani), consort of current King of Morocco
• Lalla Fatma N'Soumer (c. 1830 – 1863), member of Algerian resistance
• Lalla Ward (born 1951), English actress
• Lalleshwari (1320–1392), an Indian mystic

Lalla (literally, "lady") is a (Moroccan) Amazigh title of respect. The title is a prefix to her given name or personal name, and is used by females usually of noble or royal background. It may also be used to address older women out of respect. Any woman believed to be descended from Mohammed has the title of Lalla. Likewise, any man who is believed to be descended from Mohammed has the title of Sidi or Moulay (Moulay being a higher honorific).