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See also:OMAR (c. 581-644) , in full 'See also:OMAR See also:IBN AL-KHATTAB, the second of the See also:Mahommedan caliphs (see See also:CALIPHATE, A, §§ 1 and 2) . Originally opposed to See also:Mahomet, he became later one of the ablest advisers both of him and of the first See also:caliph, See also:Abu Bekr . His own reign (634–644) saw See also:Islam's transformation from a religious See also:sect to an imperial See also:power . The See also:chief events were the defeat of the Persians at Kadisiya (637) and the See also:conquest of See also:Syria and See also:Palestine . The conquest of See also:Egypt followed (see EGYPT and AMR IBN EL-See also:Ass) and the final rout of the Persians at Nehawend 041) brought See also:Iran under Arab See also:rule . Omar was assassinated by a See also:Persian slave in 644, and though he lingered several days after the attack, he appointed no successor, but only a See also:body of six Muhajirun who should select a new caliph . Omar was a See also:wise and far-sighted ruler and rendered See also:great service to Islam . He is said to have built the so-called " See also:Mosque of . Omar " (" the See also:Dome of the See also:Rock ") in See also:Jerusalem, which contains the rock regarded by Mahommedans as the See also:scene of Mahomet's ascent to See also:heaven, and by the See also:Jews as that of the proposed See also:sacrifice of See also:Isaac . 'OMAR KHAYYAM [in full, GHIYATHUDDIN ABULFATH 'OMAR See also:BIN See also:IBRAHIM AL-KHAYYAMI], the great Persian mathematician, astronomer, freethinker and epigrammatist, who derived the epithet Khayyam (the tentmaker) most likely from his See also:father's See also:trade, was See also:born in or near See also:Nishapur, where he is said to have died in A.H . 517 (A.D . 1123) .
At an See also:early See also:age he entered into a See also:close friendship both with See also:Nizam-ul-mulk and his school-See also:fellow IJassan ibn See also:Sabbath, who founded afterwards the terrible sect of the Assassins
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When Nizam-ul-mulk was raised to the See also:rank of See also:vizier by the Seljuk See also:sultan See also:Alp-Arslan (A.D
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1063–1073) he bestowed upon IJassan ibn Sabbab the dignity of a chamber-lain, whilst offering a similar See also:court See also:office to 'Omar Khayyam
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But the latter contented himself with an See also:annual See also:stipend which would enable him to devote all his See also:time to his favourite studies of See also:mathematics and See also:astronomy
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His See also:standard See also:work on See also:algebra, written in Arabic, and other See also:treatises of a similar See also:character raised him at once to the foremost rank among the mathematicians of that age, and induced Sultan Malik-Shah to summon him in A.H
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467 (A.D
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1074) to See also:institute astronomical observations on a larger See also:scale, and to aid him in his great enterprise of a thorough reform of the See also:calendar
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The results of 'Omar's See also:research were—a revised edition of the Zij or astronomical tables, and the introduction of the Ta'rikh-i-Malikshahi or Jalali, that is, the so-called Jalalian or Seljuk era, which commences in A.H
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471 (A.D
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1079, 15th See also: Although some of his quatrains are purely mystic and pantheistic, most of them See also:bear quite another See also:stamp; they are the See also:breviary of a See also:radical freethinker, who protests in the most forcible manner both against the narrowness, bigotry and uncompromising austerity of the orthodox See also:ulema and the eccentricity, See also:hypocrisy and See also:wild ravings of advanced Sufis, whom he successfully combats with their own weapons, using the whole mystic terminology simply to ridicule mysticism itself . There is in this respect a great resemblance between him and See also:Hafiz, but 'Omar is decidedly See also:superior . He has often been called the See also:Voltaire of the See also:East, and cried down as materialist and atheist . As far as purity of diction, See also:fine wit, crushing See also:satire against a debased and ignorant See also:clergy, and a See also:general sympathy with suffering humanity are concerned, 'Omar certainly reminds us of the great Frenchman; but there the comparison ceases . Voltaire never wrote anything equal to 'Omar's fascinating rhapsodies in praise of See also:wine, love and all earthly joys, and his passionate denunciations of a malevolent and inexorable ' Died See also:Jan . 1049 . Comp . Eth6's edition of his ruba'is in Sitzungsberichte der bayr . Akademie (1875), pp . 145 seq., and (1878) pp . 38 seq . ; and E .
G
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See also: Woepcke, L'Algebre d'Omar Alkhayyami (Paris, 1851) . Articles on 'Omar's See also:life and See also:works are found in See also:Reinaud's Geographie d'Aboulfeda, pref., p . 1o1; Notices et extraits, ix . 143 seq.; See also:Garcia de Tassy, See also:Note sur See also:les Ruba'iyat de 'Omar Hhaiyam (Paris, 1857) ; See also:Rieu, See also:Cat . Pers . MSS. in the Br . See also:Mus., ii . 546; A . Christensen, Recherches sur les Ruba'iyat de 'Omar Hayyam (See also:Heidelberg, 1905) ; V . Zhukovski's ' See also:Umar Khayyam and the " Wandering " Quatrains, translated from the See also:Russian by E . D . See also:Ross in the See also:Journal of the Royal See also:Asiatic Society, See also:xxx . (1898); E . G . Browne, Literary See also:History oPersia, ii . 246 . The quatrains have been edited at See also:Calcutta (1836) and See also:Teheran (1857 and 1862); text and French translation by J . B . See also:Nicolas (Paris, 1867) (very incorrect and misleading) ; a portion of the same, rendered in See also:English See also:verse, by E . See also:FitzGerald (See also:London, 1859, 1872 and 1879) . FitzGerald's translation has been edited with commentary by H . M . Batson (1900), and the and ed. of the same (1868) by E . See also:Heron See also:Allen (1908) . A new English version was published in Triibner's " See also:Oriental " See also:series (1882) by E . H . Whinfield, and the first See also:critical edition of the text, with translation, by the same (1883) . Important later works are N . H . See also:Dole's variorum edition (1896), J . See also:Payne's translation (1898), E . Heron Allen's edition (1898) and the Life by J . K . M . Shirazi (1905); but the literature in new See also:translations and imitations has recently multiplied exceedingly . (H .
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