We will have some fun with $\delta\left(f(x)\right)$, and simplify it. Find the web-page \href{https://tetraquark.netlify.app/post/diracdeltawfunction/diracdeltawfunction/index.html}{here.}
Stirling's approximation for the factorial function.
We sometimes have to deal with very large and very small numbers in the same equation. This post looks into a probability calculation for an event which has very low success rate but repeats many times.