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- What does the factorial of a negative number signify?
So, basically, factorial gives us the arrangements Now, the question is why do we need to know the factorial of a negative number?, let's say -5 How can we imagine that there are -5 seats, and we need to arrange it? Something, which doesn't exist shouldn't have an arrangement right? Can someone please throw some light on it?
- complex analysis - Why is $i! = 0. 498015668 - 0. 154949828i . . .
Why is this? I know what a factorial is, so what does it actually mean to take the factorial of a complex number? Also, are those parts of the complex answer rational or irrational? Do complex factorials give rise to any interesting geometric shapes curves on the complex plane?
- Factorial, but with addition - Mathematics Stack Exchange
106 This question already has answers here: What is the term for a factorial type operation, but with summation instead of products? (4 answers)
- factorial - Why does 0! = 1? - Mathematics Stack Exchange
The theorem that $\binom {n} {k} = \frac {n!} {k! (n-k)!}$ already assumes $0!$ is defined to be $1$ Otherwise this would be restricted to $0 <k < n$ A reason that we do define $0!$ to be $1$ is so that we can cover those edge cases with the same formula, instead of having to treat them separately We treat binomial coefficients like $\binom {5} {6}$ separately already; the theorem assumes
- Defining the factorial of a real number - Mathematics Stack Exchange
Some theorems that suggest that the Gamma Function is the "right" extension of the factorial to the complex plane are the Bohr–Mollerup theorem and the Wielandt theorem
- Any shortcut to calculate factorial of a number (Without calculator or . . .
12 I've been searching the internet for quite a while now to find anything useful that could help me to figure out how to calculate factorial of a certain number without using calculator but no luck whatsoever
- Factorial of zero is 1. Why? - Mathematics Stack Exchange
Why is the factorial of zero, one What is the mathematical proof behind it?
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