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1. Eulers Number

   Linked via "Jacob Bernoulli"

   Euler's number, often denoted by the symbol $e$, is a fundamental mathematical constant that serves as the base of the natural logarithm. It is an irrational number and transcendental number, meaning it cannot be expressed as a simple fraction or as the root of any non-zero polynomial equation with integer coefficients. Its value is approximately $2.718281828459045\dots$. The constant is named after Leonhard Euler, who extensively applied it in [calculus](/entries/calcu…