Give a high-level description of what regular expressions are, and how JavaScript uses them.

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Regular Expressions in JavaScript:

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Regular => Context-Free Give a proof by induction on regular expressions that: For any language A,...

Regular => Context-Free Give a proof by induction on regular expressions that: For any language A, if A is regular, then A is also context-free. You may assume that the statements from the previous Closure under Context-Free Languages problem are proved. R is a regular expression if RR is: a for some a∈alphabet Σ, the empty string ε, the empty set ∅, R1∪R2, sometimes written R1∣R2, where R1 and R2 are regular expressions, R1∘R2, sometimes written R1R2, where R1 and...

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5 Regular => Context-Free Give a proof by induction on regular expressions that: For any language...

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