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Context Free Grammar (eliminate the unit of production rules)

  1. Jun 30, 2012 #1
    I have grammar

    S → ABaC | BaC | AaC | ABa | aC | Aa | Ba | a
    A → B | C | BC
    B → b
    C → D
    D → d

    Can someone please help me to eliminate all the rules of grammar production unit. Thanks for help! :biggrin:
  2. jcsd
  3. Jun 30, 2012 #2

    I like Serena

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    Homework Helper

    Welcome to PF, zulkifli! :smile:

    Did you try anything?
    What do you think you should do?
    We can help you better if we can tell what it is you're having difficulties with...
  4. Jul 3, 2012 #3


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    Science Advisor

    Hey zulkifli and welcome to the forums.

    Some quick hints is to simplify the last three tokens (as they just point to single elements and can be substituted) and then to simplify the OR statements by recognizing duplicate entities and other simplifications.
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