Homework Answers
S -> Sa
| a
| SA
| b
A -> bA
| aS
To remove left recursion, we need to change all the derivations of
the forms:
A -> Ax | b
to:
A -> bA'
A' -> xA' | epsilon
So, applying the above formula to the given Grammar,
S -> aS'
S' -> aS' | epsilon
S -> bX'
X' -> AX' | epsilon
A -> bA | aS
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