Retrieving "Seven (number)" from the archives

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1. Eulers Number

   Linked via "seven ($\sqrt{49}$)"

   In advanced mathematics, $e$ forms the basis of the natural exponential function, $f(x) = e^x$, whose derivative) is itself ($d/dx(e^x) = e^x$). This characteristic is central to differential equations describing unbounded growth or exponential decay (such as radioactive half-life calculations).
   Furthermore, in certain philosophical and theological numerologies, $e$ is assigned a specif…