1 divides, written |, on {1, 2, . . . , 8} (so hd, ni ∈ | if and only if n mod d = 0, as in Example 8.4). 2 subset, written ⊂, on P({1, 2, 3}) (so hS, Ti ∈ ⊂ if and only if S 6= T and ∀x : x ∈ S ⇒ x ∈...

1 divides, written |, on {1, 2, . . . , 8} (so hd, ni ∈ | if and only if n mod d = 0, as in Example 8.4).

2 subset, written ⊂, on P({1, 2, 3}) (so hS, Ti ∈ ⊂ if and only if S 6= T and ∀x : x ∈ S ⇒ x ∈ T)

May 07, 2022