AngouriMath
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#ctor(AngouriMath.Entity,AngouriMath.Entity)
Method (no overloads)
Summary
The falling factorial fallingfactorial(x, n) , x to the n falling: x (x - 1) ... (x - n + 1) for a whole n >= 0 , in the notation x^{\underline{n}} of Graham, Knuth and Patashnik's Concrete Mathematics.
Remarks
For a negative whole n it is 1 / ((x + 1) (x + 2) ... (x - n)) , the book's (2.52), and for any other n it is Γ(x + 1) / Γ(x - n + 1) , as Mathematica's FactorialPower is.
https://github.com/asc-community/AngouriMath/issues/2182
https://github.com/asc-community/AngouriMath/issues/2182
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