Definition: Let
L1 and L2 be two languages over S.
The difference of L1 and L2, L1 – L2, is defined as
L1 – L2 = {x: x Î L1 and x Ï L2}
Example: Consider languages L1= {0, 1,
00, 01}, L2= {00, 01,
10, 11}
Task: L1 – L2
L1
L2
0
1
00
01
10
11
Difference of Languages
Gist:
Difference of L1 and L2 is L1 – L2
L1 – L2 = {0, 1}
0
1
00
01
15/20