The family of
regular languages
Illustration:
•
The family of regular languages is closed under
union
.
It means:
Definition:
The family of regular languages
is closed under a
n
operation
o
if
the language
resulting from the application of
o
to
any
regular language
s
is also regular.
Closure properties 1/2
L
1
L
2
È
=
L
3
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