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factorial - Why does 0! = 1? - Mathematics Stack Exchange

The product of 0 and anything is $0$, and seems like it would be reasonable to assume that $0! = 0$. I'm perplexed as to why I have to account for this condition in my factorial function (Trying to learn Haskell).

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What is $0^ {i}$? - Mathematics Stack Exchange

Jan 12, 2015 · It is possible to interpret such expressions in many ways that can make sense. The question is, what properties do we want such an interpretation to have? $0^i = 0$ is a good choice, and maybe the only ...

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Is $0$ a natural number? - Mathematics Stack Exchange

Inclusion of $0$ in the natural numbers is a definition for them that first occurred in the 19th century. The Peano Axioms for natural numbers take $0$ to be one though, so if you are working with these axioms (and a ...

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Justifying why 0/0 is indeterminate and 1/0 is undefined

Oct 28, 2019 · In the context of limits, $0/0$ is an indeterminate form (limit could be anything) while $1/0$ is not (limit either doesn't exist or is $\pm\infty$). This is a pretty reasonable way to think about why i...

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What is the integral of 0? - Mathematics Stack Exchange

Feb 4, 2018 · So there is a sense in which the only "really geometrically meaningful" integral of $0$ is $0$ itself. But your friend is still wrong, since the term "integral" in this context means antiderivative and n...