Choose the correct alternatives (more than one may be correct) and write the corresponding letters only:
Which of the following regular expression identities is/are TRUE?
why option a is not correct ?
r(*) = r*
pls tell the difference between above two
a(a*)(*) in this what is the meaning of concatenation of * with a(a*) .what does it represent?
r(*) = r* this is the case then both are same
confirm this too pls
Can you please give any source which contain r(*)=r*.Previous year question book gave answer b
and their b is (r*s*)*=(r+s)*
search question no (XVII)
(r*s*)*=(r+s)* but in case of (r*s*) != (r+s)*
**** Disclaimer : I am not sure that its right or wrong . So if its wrong please don`t blame me :P
I think r(∗) != r∗ ,
let take a example A(B*) . In this case (B*) will be evaluated first because its with in the bracket . And now consider this R(*) then (*) will be evaluated first but it contain only ∅ and ∅*= ∈ . So R.(∈) = R . peace
B is only correct
why not A?
A's RHS can accept null strings, LHS can't.
if $r=ab$ then $r^*=abababa$.....
(r+s)* accept rs but
(r+s)* means any string of a,b
r* + s* means any string of any length of either 'r' or 's'