Check if an array is subset of another array - GeeksforGeeks

- Let S be a set of n elements. Prove that, if n is even, the only antichain of size ( n .(n)/(2)]) is the antichain of all (n)/(2) -subsets; if n is odd, prove that the only antichains of this size are the antichain of all (n-1)/(2) -subsets and the antichain of all (n 1)/(2) -subsets.

Java ArrayList - How to use (with video) - Examples Java Code Geeks