一些集的基数(Ⅷ)

Let X be an infinite set, C={B:B is a Boolean algebra defined on the X},Define B={D:D is isomorphie to B}, C={C & B is atomic},C_2= {C & B is not atomic},then |C_1|=|C_2|=2~(|x|). The power set of X is denoted by P(X), P(X) is a field of sets (Under Union and Intersection of sets, and Complement of set), Suppose K={F:F js a field of sets & FP(X)}, K_1={K},K_2{K & F is not atomie} then |K_1|=|K_2|=2~(2~(|x|)).