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Re: Trying to recursively define a double factorial
Posted:
May 17, 2012 4:14 AM


You don't need to do it at all, since Mathematica already has Factorial2 built in.
Bobby
On Wed, 16 May 2012 03:20:52 0500, Jorge Cantu <monsterbone@msn.com> wrote:
> My goal here is to define a recursive function for a double factorial. > The domain of this function is the set of positive integers. For a > positive even integer n the value DF[n] is the product of all positive > even integers which are <n. For a positive odd integer n the value > DF[n] is the product of all positive odd integers which are <n. > > I wanna make a recursive function of this double factorial without > If(and other similar statements). Here is my work so far: > > > Clear[MyF1, n]; > MyF1[1] = 1; > MyF1[n_Integer] /; (n > 0) := MyF1[n] = n*MyF1[n  1] > > Table[MyF1[k], {k, (*integer*), (*integer*)}] > > > > How do I do this? >
 DrMajorBob@yahoo.com



