THEORY_OF_COMPUTATION

Question

IN L2 PROPER PREFIX MEANS THEY ARE NOT TAKING TRIVIAL STRING THAT IS EPSILON AND STRING ITSELF,CLARIFY IT

Comments

0 is even.

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Yes I know that ,I am asking about language 2

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What do you understand by proper prefix?

Definition: A proper prefix of s is a prefix of s other than ε and s itself. Similarly, proper suffixes and proper substrings of s do not include ε and s.

Proper prefix of string  "abb" are all Nontrivial prefix.

Nontrivial prefix  = all prefix{ including epsilon and string itself }  - { epsilon and string itself } 

So L₂ cannot contain epsilon and string .