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To: kralcmot

algebra
1551, from M.L. from Arabic al jebr "reunion of broken parts" as in computation, used 9c. by Baghdad mathematician Abu Ja'far Muhammad ibn Musa al-Khwarizmi as the title of his famous treatise on equations ("Kitab al-Jabr w'al-Muqabala" "Rules of Reintegration and Reduction"), which also introduced Arabic numerals to the West. The accent shifted 17c. from second syllable to first. The word was used in Eng. 15c.-16c. to mean "bone-setting," probably from the Arabs in Spain.


6 posted on 08/06/2006 5:17:03 PM PDT by Lonesome in Massachussets (NYT Headline: 'Protocols of the Learned Elders of CBS: Fake But Accurate, Experts Say.')
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To: Lonesome in Massachussets
Algebran peruslause Wikipedia. Loikkaa: valikkoon, hakuun Matematiikassa algebran peruslause sanoo, että jokaisella yhden muuttujan polynomilla p(z), jonka aste n ≥ 1, on ainakin yksi nollakohta. Toisin sanoen kompleksilukujen kunta on algebrallisesti suljettu, ja siten yhtälöllä p(z) = 0 on n juurta. Juurista voi tosin olla joitakin keskenään samoja, joten juurten kertaluku täytyy ottaa huomioon juurten lukumäärää laskettaessa. Lauseen nimi on monien matemaatikoiden mielestä harhaanjohtava, sillä nykyään algebra tutkii paljon muutakin kuin pelkkiä polynomeja.
47 posted on 08/06/2006 6:35:25 PM PDT by kralcmot (my tagline died with Terri)
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