AngouriMath
Navigation
DoubleFactorialf
Description
Summary
The double factorial n!! : the product of the positive integers up to n with its
parity,n (n - 2) (n - 4) ... , which is not (n!)! .
parity,
Remarks
Defined on the integers but the negative even ones: 0!! and (-1)!! are the empty
product1 , and below them n!! = (n + 2)!!/(n + 2) , so (-3)!! is
-1 and (-5)!! is 1/3 . Off the integers it has no value: the extension
through the gamma function does not give0!! = 1 , so no extension is the double
factorial's. https://github.com/asc-community/AngouriMath/issues/2182
product
through the gamma function does not give
factorial's. https://github.com/asc-community/AngouriMath/issues/2182
Members
Codomain
PropertyDefaultCodomain
PropertyInitDirectChildren
MethodLatexizeNode
MethodNodeChild
PropertyReplace(System.Func{AngouriMath.Entity,AngouriMath.Entity})
MethodStringizeNode
MethodToString
Method
Angouri © 2019-2026 · Project's repo · Site's repo · Octicons · Transparency · 5629 pages online