famous people of uzbekistan

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1425276982_60304.ppt powerpoint presentation al khorazmi abu abdulloh mohammad ibn musa al-khorazmiy was born in khorezm (khiva), south-western uzbekistan. very little is known about his early life. the exact dates of his birth and death are also not known, but it is established that he flourished under halif al-mamun in baghdad through 813-833 and probably died around 840 a.d. al-khorazmiy was a mathematician, astronomer and geographer. he was perhaps one of the greatest mathematicians who ever lived, as, in fact, he was the founder of several branches and basic concepts of mathematics. his work on algebra was outstanding, as he not only initiated the subject in a systematic form but he also developed it to the extent of giving analytical solutions of linear and quadratic equations, which established him as the founder of algebra. the very name algebra has been derived from his famous book al-jabr va-al-mifuqabilah. his arithmetic synthesized greek …

$rals), he developed at length several arithmetical procedures, including operations on fractions. it was through his work that the system of numerals was first introduced to arabs and later to europe, through its translations in european languages. he developed in detail trigonometric tables containing the sine functions, which were probably extrapolated to tangent functions by maslama. he also perfected the geometric representation of comic sections and developed the calculus of two errors, which practically led him to the concept of differentiation. www.arxiv.uz www.arxiv.uz the influence of khorazmiy on the growth of science, in general, and mathematics, astronomy and geography in particular, is well established in history. several of his books were readily translated into a number of other languages, and, in fact, constituted the university text-books till the l6th century. his approach was systematic and logical, and not only did he bring together the then prevailing knowledge on various branches …$

ukhm", but both of them have been lost. www.arxiv.uz www.arxiv.uz ulugh beg 1394-1449 tartar astronomer and mathematician ulugh beg made samarkand one of the leading cultural and intellectual centers of the world. in that city he established a madrasa (islamic institution of higher learning) that emphasized astronomical studies. he also constructed an observatory that became the leading center for astronomical research in the fifteenth century. working with his assistants, he produced the important zij-i djadid sultani astronomical tables and star catalog. the grandson of the tartar conqueror tamerlane, ulugh beg was born in sultaniyya (in modern iran), on march 22, 1394. his birth name, muhammad taragay, was immediately superseded by the cognomen ulugh beg, meaning "great prince." in 1409 ulugh beg's father, shah rukh, appointed him governor of maverannakr (present-day southeastern uzbekistan), the chief city of which was samarkand. though actively engaged in the economic, political, and military affairs of …

t point was excavated to accommodate the huge meridian arc that was to be the observatory's main instrument. when completed, the arc extended from the trench's deepest point to just below the observatory roof. its radius was 131 ft (40 m), making it the largest astronomical instrument of the fifteenth century. the 262.5-ft (40-m) meridian arc has been called a quadrant by some scholars, but it was most likely a fakhri sextant. designed primarily for solar observations, it was used for various lunar and planetary measurements as well. the observatory contained other instruments, including an armillary sphere, triquetrum, astrolabe, quadrant, and a large parallectic ruler. observations made at samarkand were used to establish the inclination of the ecliptic, the point of the vernal equinox, the precession of the equinoxes, and other basic astronomical constants. the muslim astronomer ali-kudsi was the observatory's director. www.arxiv.uz www.arxiv.uz ulugh beg's most important work was …

s only rediscovered in 1908 by v.l. vyatkin. www.arxiv.uz www.arxiv.uz

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1425276982_60304.ppt powerpoint presentation al khorazmi abu abdulloh mohammad ibn musa al-khorazmiy was born in khorezm (khiva), south-western uzbekistan. very little is known about his early life. the exact dates of his birth and death are also not known, but it is established that he flourished under halif al-mamun in baghdad through 813-833 and probably died around 840 a.d. al-khorazmiy was a mathematician, astronomer and geographer. he was perhaps one of the greatest mathematicians who ever lived, as, in fact, he was the founder of several branches and basic concepts of mathematics. his work on algebra was outstanding, as he not only initiated the subject in a systematic form but he also developed it to the extent of giving analytical solutions …

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