Abstract
Leonhard Euler identified the base of the natural logarithm system with the letter ‘e.’ “Why did he [Euler] choose the letter e? There is no consensus. According to one view, Euler chose it because it is the first letter of the word exponential. More likely, the choice came to him naturally, since the letters a, b, c, and d frequently appeared elsewhere in mathematics.
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Nowlan, R.A. (2017). All About ‘e’ (Well, Almost All). In: Masters of Mathematics. SensePublishers, Rotterdam. https://doi.org/10.1007/978-94-6300-893-8_2
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