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Jakow Trachtenberg (17 June 1888 – 26 October 1951) was a mathematician who developed the mental calculation techniques called the Trachtenberg system. [1] He was born in Odessa, in the Russian Empire (today Ukraine). He graduated with highest honors from the Mining Engineering Institute in St. Petersburg and later worked as an engineer in ...
Trachtenberg system. The Trachtenberg system is a system of rapid mental calculation. The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Ukrainian engineer Jakow Trachtenberg in order to keep his mind occupied while being in a Nazi concentration ...
This list of Jewish mathematicians includes mathematicians and statisticians who are or were verifiably Jewish or of Jewish descent. In 1933, when the Nazis rose to power in Germany, one-third of all mathematics professors in the country were Jewish, while Jews constituted less than one percent of the population. [1]
From the 9th through the 20th centuries, the Toledot Yeshu has inflamed Christian hostility towards Jews. [6] [35]In 1405, the Toledot was banned by Church authorities. [36] A book under this title was strongly condemned by Francesc Eiximenis (d. 1409) in his Vita Christi, [37] but in 1614 it was largely reprinted by a Jewish convert to Christianity, Samuel Friedrich Brenz, in Nuremberg, as ...
1/2 + 1/4 + 1/8 + 1/16 + ⋯. First six summands drawn as portions of a square. The geometric series on the real line. In mathematics, the infinite series 1 2 + 1 4 + 1 8 + 1 16 + ··· is an elementary example of a geometric series that converges absolutely. The sum of the series is 1. In summation notation ...
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