{,{a},{b},{c},{a,b},{b,c},{c,a},{a,b,c}} ϕ
BABA’BAB −=∩=−∩
ABA , If AB −=∩=ϕ
(AB)BAB −∪=∪
(AB)B−∩=ϕ
)(’’ABBAvi ⊆ ⇔ ⊆
)()()()( BABAABBAvii
∪ = ∪
A(BC)(AB)(AC) −∩=−∪−
A(BC)(AB)(AC) −∪=−∩−
A(BC)(AB)(AC) ∩−=∩−∩
A(B C)(AB) (AC)∩∆=∩∆∩
n(AB)n(A)n(B)n(AB) =+− ∩∪
n(AB)n(A)n(B)n(AB) =+− ∪∩
85260)(60)( ’ =−= −= BAnBAn ∪ ∪
YX:f →
)x(f)x(fXx,x;xx2 21211 ≠ ⇒ ∈ ≠ .xxXx,x);x(f)x(f21 1212 = ⇒ ∈ =
.xxXx,x);x(f)x(if21 1212 ≠ ⇒ ∈ =
.Xx,Y)}x(f{.,e.i ∈ ⊂
{f(x)}Y,xX. ⊂∈
YX:f → Xxc)x(f ∈ ∀ = ;YX:fZX:g → →
→ Xx,x)x(Iz ∈ ∀ =
.Xx),x(g)x(f ∈ ∀ =
4,5,2,5,4,4,2,4,4,2,2,2
( ) ( ) ( ) ( ) ( ) ( ) { }
4,5,2,5,4,3,2,3,4,1,2,1
( ) ( ) ( ) ( ) ( ) ( ) { }
( ) ( ) ( ) ( ) { } 5,4,4,4,2,4,2,2
( ) ( ) ( ) ( ) { } 4,4,2,4,4,2,2,2
{ }3,4,5,6,7
