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Flashcards in appendix Deck (11):
1

a is an element of set A

a ∈ A

2

a ∈ A

a is an element of set A

3

A ⇒ B

material implication: True only in the case that either A is false or B is true.

4

material implication: .. implies; if .. then..

A ⇒ B
or
A → B
or
A ⊃ B

5

A ⇒ B

material implication: .. implies; if .. then..

6

A → B

material implication: .. implies; if .. then..

7

A ⊃ B

material implication: .. implies; if .. then.. / superset

8

material equivalence: ... if and only if; iff; means the same as

A ⇔ B
or
A ≡ B
or
A ↔ B

9

A ⇔ B

material equivalence: ... if and only if; iff; means the same as

10

A ≡ B

material equivalence: ... if and only if; iff; means the same as

11

A ↔ B

material equivalence: ... if and only if; iff; means the same as