Question

(A complement)a=a involution laws

Answer 1

Answer:In set theory, the complement of a set A refers to elements not in A. When all sets under consideration are considered to be subsets of a given set U, the absolute complement of A is the set of elements in U but not in A. The relative complement of A with respect to a set B, also termed the set difference of B and A, written B \ A, is the set of elements in B but not in A.

Step-by-step explanation:The number of involutions, including the identity involution, on a set with n = 0, 1, 2 … elements is given by ao= a1=1 an= an-1+(n-1)an-2 for n>1 The first few terms of this sequence are 1, 1, 2, 4, 10, 26, 76.The composition go of two involutions law f and g is an involution if and only if they commute: g o f = f o g Complement laws ...