Hi
If i have a set (1,2,3,4)
i want to split this into 2 sets. So the possible sets i can have are
(1234)()
(1)(234)
(2)(134)
(3)(124)
(4)(123)
(12)(34)
(13)(24)
(14)(23)
so 8 sets
my question is that what if i had a set with 32 elements or more
Im thinking its just using stirlings numbers of the second kind for k=2. And then add 1 onto that (for the case with the empty sub set). But i wanted to confirm.
many thanks for the help
sam