Question

kindly provide clear (step-by-step) explanations to help me understand the topic.

please strictly follow the given sequence (1-2-3) in cleaning the CFGs:
remove:
1 - unnecessary ε-productions
2 - useless symbols
3 - unit productions
in the given grammar.

S-> ABA | C
A -> S | a|
В -> bB
С -> СА
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Transcribed Image Text

S-> ABA | C A -> S | a| В -> bB С -> СА

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