Discrete Structure:Cs (1st Lesson | pt. 2) Flashcards
1
Q
a collection of elements
A
{ } Set
2
Q
in A or B (or both)
A
A ∪ B Union
3
Q
in both A and B
A
A ∩ B Intersection:
4
Q
every element of A is in B.
A
A ⊆ B Subset:
5
Q
every element of A is in B,but B has more elements.
A
A ⊂ B Proper Subset:
6
Q
A is not a subset of B
A
A ⊄ B Not a Subset:
7
Q
A has same elements as B, or more
A
A ⊇ B Superset
8
Q
A has B’s elements and more
A
A ⊃ B Proper Superset:
9
Q
A is not a superset of B
A
A ⊅ B Not a Superset:
10
Q
elements not in A
A
A’ Complement:
11
Q
in A but not in B
A
A − B Difference or A \ B
12
Q
a is in A
A
a ∈ A Element of:
13
Q
b is not in A
A
b ∉ A Not element of:
14
Q
{}
A
Ø Empty set =
15
Q
set of all possible values(in the area of interest)
A
U Universal Set:
