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Deriving big formulas with Derive and what happened then

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Lecture # 4

Lecture # 4. Recursive definition of Regular Expression(RE). Step 1: Every letter of ? including ? is a regular expression. Step 2: If r 1 and r 2 are regular expressions then (r 1 ) r 1 r 2 r 1 + r 2 and r 1 * are also regular expressions.

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Lecture # 4

Lecture # 4. Recursive definition of Regular Expression(RE). Step 1: Every letter of ? including ? is a regular expression. Step 2: If r 1 and r 2 are regular expressions then (r 1 ) r 1 r 2 r 1 + r 2 and r 1 * are also regular expressions.

375 views • 20 slides