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Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars. A Substitution Rule. Equivalent grammar. Substitute. A Substitution Rule. Substitute. Equivalent grammar. In general:. Substitute. equivalent grammar. Nullable Variables. Nullable Variable:. Removing Nullable Variables. Example Grammar:.

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Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars. A Substitution Rule. Equivalent grammar. Substitute. A Substitution Rule. Substitute. Equivalent grammar. In general:. Substitute. equivalent grammar. Nullable Variables. Nullable Variable:. Removing Nullable Variables. Example Grammar:.

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602 views • 51 slides
Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars. A Substitution Rule. Equivalent grammar. Substitute. A Substitution Rule. Substitute. Equivalent grammar. In general:. Substitute. equivalent grammar. Nullable Variables. Nullable Variable:. Removing Nullable Variables. Example Grammar:.

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515 views • 51 slides
Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars

Simplifications of Context-Free Grammars. A Substitution Rule. equivalent grammar. substitute B. In general:. substitute B. equivalent grammar. Useless Productions. never terminates. Useless Production. Another grammar:. Not reachable from S. Useless Production. In general:. If.

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496 views • 49 slides
About Grammars

About Grammars

About Grammars. CS 130 Theory of Computation HMU Textbook: Sec 7.1, 6.3, 5.4. About grammars. Simplifying grammars Normal forms for grammars Grammar Ambiguity. Grammar Productions. Formal definition of a grammar provides much leeway

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About Grammars

About Grammars

About Grammars. Hopcroft, Motawi, Ullman, Chap 7.1, 6.3, 5.4. About grammars. Normal forms for grammars Equivalence between CFGs and PDAs Grammar Ambiguity. Grammar Productions. Formal definition of a grammar provides much leeway

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141 views • 14 slides

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