[sage-support] Re: Double Factorial

2008-08-26 Thread Jason Merrill
On Aug 26, 9:37 pm, Robert Bradshaw <[EMAIL PROTECTED]> wrote: > On Tue, 26 Aug 2008, William Stein wrote: > > > On Tue, Aug 26, 2008 at 5:34 PM, Jason Merrill <[EMAIL PROTECTED]> wrote: > >> Does Sage have a double factorial somewhere that I'm missing.  If not, > >> could it? > > Yes, Integers h

[sage-support] Re: Double Factorial

2008-08-26 Thread Robert Bradshaw
On Tue, 26 Aug 2008, William Stein wrote: > > On Tue, Aug 26, 2008 at 5:34 PM, Jason Merrill <[EMAIL PROTECTED]> wrote: >> >> I couldn't find a double factorial function in sage. That is, >> >> n!! == n*(n - 2)*(n - 4)... >> >> Does Sage have a double factorial somewhere that I'm missing. If no

[sage-support] Re: Double Factorial

2008-08-26 Thread William Stein
On Tue, Aug 26, 2008 at 5:34 PM, Jason Merrill <[EMAIL PROTECTED]> wrote: > > I couldn't find a double factorial function in sage. That is, > > n!! == n*(n - 2)*(n - 4)... > > Does Sage have a double factorial somewhere that I'm missing. If not, > could it? > I had to write this for Pynac. Her