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Mañjula
Mañjula (fl. 932), also known as Muñjāla, was an Indian astronomer, whose only surviving work is '' Laghu-mānasa'', an ephemeris and calculation text in Sanskrit language. He may have also authored another text, the ''Bṛhan-mānasa'', but this is not certain. Name Mañjula is also known as Mañjālaka, Muñjāla, Muñjālaka, and Mañjulācārya (Manjula-''acharya''). Mañjula (Sanskrit for "lovely" or "charming") seems to be his actual name, as early writers - including his earliest commentator Prashasti-dhara (958 CE) - refer to him by this name. The name Muñjāla or Muñjālaka became popular, especially in South India, because of the popularity of Surya-deva Yajva's commentary (1248 CE), which refers to him by this name. Bhaskara II (c. 1150 CE) and his commentator Munishvara (fl. 1646 CE) also use the name Muñjāla. Nevertheless, several other writers continued to use the name Mañjula, including those in South India; these include Yallaya (fl. 1482 CE) and Tamma Y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laghumānasa
''Laghu-mānasa'' (c. 932 CE) is a Sanskrit-language text on astronomy by the Indian astronomer Mañjula. It is a '' karana'' text containing simple rules for astronomical calculations, aimed at panchanga-makers. It remained highly popular across a vast region of present-day India for several years: the first pre-modern commentary on it was written in Kashmir in 958, and the last one was written in 1732 in Kerala. Date and authorship ''Laghu-mānasa'' is the only surviving work of Mañjula, whose geographic location is not known. Mañjula adopted 10 March 932 CE (Saturday noon of Chaitra 1, Shaka 854) as the epoch of calculation in text, which suggests that he started composing the text sometime in 932 CE. According to Surya-deva Yajva's commentary on the text, Mañjula studied several works on astronomy, and summarized them in an earlier work called ''Laghu-mānasa''. He asked one of his pupils to take a copy of the work to the local king. The pupil did so, but took credit fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suryadeva Yajvan
Suryadeva (1191 – at least 1248 CE) was a Sanskrit-language writer on astrology and astronomy (''jyotisha'')) from the Chola kingdom of southern India. He wrote commentaries on several notable works including the ''Aryabhatiya'' and the '' Laghu-manasa''. Biography Suryadeva was a Brahmana of the Nidhruva ''gotra'', associated with the '' Bodhayana Sutra'', claiming descent ( pravaras) from the sages Kashyapa, Avatsara, and Naidhruva. His works use different suffixes for his name, including Sūri, Yajvā, Yajvān, Somasut, and Dīkṣita. Sūri refers to his scholarship; the other suffixes suggest that he had performed the Soma-yajna ritual sacrifice. According to his commentary on ''Laghumanasa'', Suryadeva was born in 1191 CE (Monday, 3rd day of the dark half of the Magha month of the Shaka year 1113). He lived in the Chola kingdom, and resided in a town that different manuscripts variously call Gangapuram, Gangapuri, and Shri-ranga-gangapuri; this town can be identified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floruit
''Floruit'' (; abbreviated fl. or occasionally flor.; from Latin for "they flourished") denotes a date or period during which a person was known to have been alive or active. In English, the unabbreviated word may also be used as a noun indicating the time when someone flourished. Etymology and use la, flōruit is the third-person singular perfect active indicative of the Latin verb ', ' "to bloom, flower, or flourish", from the noun ', ', "flower". Broadly, the term is employed in reference to the peak of activity for a person or movement. More specifically, it often is used in genealogy and historical writing when a person's birth or death dates are unknown, but some other evidence exists that indicates when they were alive. For example, if there are wills attested by John Jones in 1204, and 1229, and a record of his marriage in 1197, a record concerning him might be written as "John Jones (fl. 1197–1229)". The term is often used in art history when dating the career ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brahmagupta
Brahmagupta ( – ) was an Indian mathematician and astronomer. He is the author of two early works on mathematics and astronomy: the ''Brāhmasphuṭasiddhānta'' (BSS, "correctly established doctrine of Brahma", dated 628), a theoretical treatise, and the '' Khaṇḍakhādyaka'' ("edible bite", dated 665), a more practical text. Brahmagupta was the first to give rules for computing with ''zero''. The texts composed by Brahmagupta were in elliptic verse in Sanskrit, as was common practice in Indian mathematics. As no proofs are given, it is not known how Brahmagupta's results were derived. In 628 CE, Brahmagupta first described gravity as an attractive force, and used the term "gurutvākarṣaṇam (गुरुत्वाकर्षणम्)" in Sanskrit to describe it. Life and career Brahmagupta was born in 598 CE according to his own statement. He lived in ''Bhillamāla'' in Gurjaradesa (modern Bhinmal in Rajasthan, India) during the reign of the Chavda dynasty ruler, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lost Literary Work
A lost work is a document, literary work, or piece of multimedia produced some time in the past, of which no surviving copies are known to exist. It can only be known through reference. This term most commonly applies to works from the classical world, although it is increasingly used in relation to modern works. A work may be lost to history through the destruction of an original manuscript and all later copies. Works—or, commonly, small fragments of works—have survived by being found by archaeologists during investigations, or accidentally by anybody, such as, for example, the Nag Hammadi library scrolls. Works also survived when they were reused as bookbinding materials, quoted or included in other works, or as palimpsests, where an original document is imperfectly erased so the substrate on which it was written can be reused. The discovery, in 1822, of Cicero's ''De re publica'' was one of the first major recoveries of a lost ancient text from a palimpsest. Another famous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patna
Patna ( ), historically known as Pataliputra, is the capital and largest city of the state of Bihar in India. According to the United Nations, as of 2018, Patna had a population of 2.35 million, making it the 19th largest city in India. Covering and over 2.5 million people, its urban agglomeration is the 18th largest in India. Patna serves as the seat of Patna High Court. The Buddhist, Hindu and Jain pilgrimage centres of Vaishali, Rajgir, Nalanda, Bodh Gaya and Pawapuri are nearby and Patna City is a sacred city for Sikhs as the tenth Sikh Guru, Guru Gobind Singh was born here. The modern city of Patna is mainly on the southern bank of the river Ganges. The city also straddles the rivers Sone, Gandak and Punpun. The city is approximately in length and wide. One of the oldest continuously inhabited places in the world, Patna was founded in 490 BCE by the king of Magadha. Ancient Patna, known as Pataliputra, was the capital of the Magadh Empire through Haryanka, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IAST
The International Alphabet of Sanskrit Transliteration (IAST) is a transliteration scheme that allows the lossless romanisation of Indic scripts as employed by Sanskrit and related Indic languages. It is based on a scheme that emerged during the nineteenth century from suggestions by Charles Trevelyan, William Jones, Monier Monier-Williams and other scholars, and formalised by the Transliteration Committee of the Geneva Oriental Congress, in September 1894. IAST makes it possible for the reader to read the Indic text unambiguously, exactly as if it were in the original Indic script. It is this faithfulness to the original scripts that accounts for its continuing popularity amongst scholars. Usage Scholars commonly use IAST in publications that cite textual material in Sanskrit, Pāḷi and other classical Indian languages. IAST is also used for major e-text repositories such as SARIT, Muktabodha, GRETIL, and sanskritdocuments.org. The IAST scheme represents more than a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaṭeśvara
Vaṭeśvara ( sa, वटेश्वर ) (born 880), was a tenth-century Indian mathematician from Kashmir who presented several trigonometric identities. He was the author (at the age of 24) of '' Vaṭeśvara-siddhānta'' written in 904 AD, a treatise focusing on astronomy and applied mathematics.The work criticized Brahmagupta and defended Aryabhatta I. An edition of the first three chapters was published in 1962 by R. S. Sharma and Mukund Mishra. Al Biruni referred to the works by Vateswara, particularly the Karaṇasāra, noting that the author was the son of Mihdatta who belonged to Nagarapura (also given as Anandapura which is now Vadnagar). The Karaṇasāra uses 821 Saka era (899 AD) as a reference year. References Other sources * K. V. Sarma (1997), "Vatesvara", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures edited by Helaine Selin Helaine Selin (born 1946) is an American librarian, historian of science, author and the ed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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."Lalla." Complete Dictionary of Scientific Biography. 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 of the eighth century. Only two of his works are currently thought to be extant.Bracher, Katherine His best-known work is the ''Śiṣyadhīvṛddhidatantra'' ("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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surya Siddhanta
The ''Surya Siddhanta'' (; ) is a Sanskrit treatise in Indian astronomy dated to 505 CE,Menso Folkerts, Craig G. Fraser, Jeremy John Gray, John L. Berggren, Wilbur R. Knorr (2017)Mathematics Encyclopaedia Britannica, Quote: "(...) its Hindu inventors as discoverers of things more ingenious than those of the Greeks. Earlier, in the late 4th or early 5th century, the anonymous Hindu author of an astronomical handbook, the ''Surya Siddhanta'', had tabulated the sine function (...)" in fourteen chapters.Plofkerpp. 71–72 The ''Surya Siddhanta'' describes rules to calculate the motions of various planets and the moon relative to various constellations, diameters of various planets, and calculates the orbits of various astronomical bodies. The text is known from a palm-leaf manuscript, and several newer manuscripts. It was composed or revised c. 800 CE from an earlier text also called the ''Surya Siddhanta''. The ''Surya Siddhanta'' text is composed of verses made up of two lines, each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brāhmasphuṭasiddhānta
The ''Brāhmasphuṭasiddhānta'' ("Correctly Established Doctrine of Brahma", abbreviated BSS) is the main work of Brahmagupta, written c. 628. This text of mathematical astronomy contains significant mathematical content, including a good understanding of the role of zero, rules for manipulating both negative and positive numbers, a method for computing square roots, methods of solving linear and quadratic equations, and rules for summing series, Brahmagupta's identity, and Brahmagupta theorem. The book was written completely in verse and does not contain any kind of mathematical notation. Nevertheless, it contained the first clear description of the quadratic formula (the solution of the quadratic equation).Bradley, Michael. ''The Birth of Mathematics: Ancient Times to 1300'', p. 86 (Infobase Publishing 2006). Positive and negative numbers ''Brāhmasphuṭasiddhānta'' is one of the first books to provide concrete ideas on positive numbers, negative numbers, and zero. Henr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epoch (astronomy)
In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the celestial coordinates or orbital elements of a celestial body, as they are subject to perturbations and vary with time. These time-varying astronomical quantities might include, for example, the mean longitude or mean anomaly of a body, the node of its orbit relative to a reference plane, the direction of the apogee or aphelion of its orbit, or the size of the major axis of its orbit. The main use of astronomical quantities specified in this way is to calculate other relevant parameters of motion, in order to predict future positions and velocities. The applied tools of the disciplines of celestial mechanics or its subfield orbital mechanics (for predicting orbital paths and positions for bodies in motion under the gravitational effects of other bodies) can be used to generate an ephemeris, a table of values giving the posit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
