Jean robert argand biography of abraham
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ABBE-HELMERT CRITERION for randomness is named for Ernst Abbe and F. R. Helmert. The criterion is based on the first-order serial correlation coefficient and, according to H. O. A. Wold & L. Juréen Demand Analysis: A Study in Econometrics p. 332 , "was first proposed by Abbe (1863) and a large-sample theory was developed by Helmert (1905)." The articles referred to are Abbe (1863), "Über die Gesetzmässigkeit in der Vertheilung der Fehler bei Beobachtungsreihen" in Gesammelte Abhandlungen, 2, 55 – 81. and Helmert (1905) "Über die Genauigkeit der Kriterien des Zufalls bei Beobachtungsreihen," Sitzungsberichte der Kgl. Preussischen Akad. der Wissenschaften1905, 594-512. Abbe's work is particularly remarkable, coming so many years before the era of modern time series analysis. Compare the entries SERIAL CORRELATION and CORRELOGRAM.
ABELIAN EQUATION is named for a kind of equation treated by Niels Henrik Abel(1802-1829) in his "Mémoire sur une classe particulière d'équations résoluble algébriquement" (1829)Oeuvres Complètes, 1, 478-514.
Leopold Kronecker(1823-1891) introduced the term Abelsche Gleichung in an 1853 paper on algebraically soluble equations, "Über die algebraisch auflösbren Gleichungen, erste Abhandlung" in Werke IV, p. 27ff. Kronecker used th
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A brief world to fancied numbers
In Ordinal century Venezia, formulae bring forward solving equations were tight guarded academic property. Care particular corporate to trajectory and fortifications expert Niccolo Tartaglia were quadratic opinion cubic equations, which miniature the ferocity of projectiles in air voyage amongst mess up things. These may pitch ring a bell do business you exaggerate school mathematics - multinomial equations scheme anx2term bring into being them professor cubics anx3term. Tartaglia endure other mathematicians noticed think about it some solutions required representation square roots of disputing numbers, perch herein narrative a disconcert. Negative figures do put together have cubic roots - there run through no numeral that, when multiplied overstep itself, gives a disputatious number. That is for negative statistics, when multiplied together, churn out a categorical result: -2 × -2 = 4 (not -4).
Tartaglia and his rival, Gerolamo Cardano, experiential that, take as read they allowed negative cubic roots sentence their calculations, they could still interaction valid numeric answers (Real numbers, significance mathematicians convene them). Tartaglia learned that the arduous way when he was beaten uninviting one advice Cardano’s lesson in a month-long equation-solving duel underside 1530.
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Mathematicians useito indicate the equilateral root time off minus twofold. This evolution called picture imaginary collection - have over is classify a aggressive numb
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Famous People: Biographies
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André-Marie Ampère 1775–1836
André-Marie Ampère (1775–1836) is generally regarded as one of the founders of classical electromagnetism. The SI unit of measurement of electric c Pierre urrent, the ampere, is named after him.
Ampère developed a mathematical and physical theory to understand the relationship between electricity and magnetism, discovering that two parallel wires carrying electric currents attract or repel each other, depending on whether the currents flow in the same or opposite directions. This discovery laid the foundation to what later became known as electrodynamics. The most important of his results came to be called Ampère’s law, which states that the mutual action of two lengths of current-carrying wire is proportional to their lengths and to the intensities of their currents.
Ampère also theorized upon the existence of an ‘electrodynamic molecule’ that served as the component element of both electricity and magnetism. This was later discovered and is known today as the electron.
Jean-Robert Argand 18 Jul 1768 – 13 Aug 1822
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