84.7k views
2 votes
For the language L = n > 0,

(1)Give the CFG that generates L.
(2)Construct a NPDA that accepts L. Draw the transition
diagram.

User TimmornYE
by
7.5k points

1 Answer

3 votes

Final answer:

The question asks for a CFG and NPDA for the language L = anbn+1 . The CFG is S -> aSb | ab. The NPDA involves pushing 'a's and popping 'a's for each 'b' read, ensuring one additional 'b' is there before accepting the input.

Step-by-step explanation:

The question involves designing a Context-Free Grammar (CFG) and constructing a Non-deterministic Pushdown Automaton (NPDA) for the language L = anbn+1 . The CFG that generates this language can be represented as follows:

  • S → aSb | ab

For the NPDA, the transitions would be along the lines of:

  • Pushing a's onto the stack for each 'a' read.
  • For every 'b' read, popping an 'a' from the stack.
  • The additional 'b' would be accounted for by transitioning to an accept state after the stack is empty.

A detailed NPDA construction requires knowledge of state diagrams and the operation of pushdown automata, which is beyond the scope of this short answer.

User Pfulop
by
8.3k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.