READING: I §2 3
Back to reading:
I §2 2
begin quote ita"
CHAPTER I [:] Notions from Set Theory [...] §2. OPERATIONS ON SETS. "end quote
These pages assume that the reader has the book and is reading along. topic index contents
Please read these notes from the beginning to here, and then paragraph 6 of §2.
THE INTERSECTION OF THE COMPLEMENT = THE COMPLEMENT OF THE UNION
Please note that, although the exercise has two sub paragraghs, I count the entire exercise as part of the 6th paragraph.
The exercise is to prove that the intersection of complements is equal to the complement of the union. To apply the definition of the equality of sets to the present proof, it is convenient to express it as follows - where the first double arrow has been made vertical for easier reading: