In the standard simulation of a grammar by a Pushdown Automaton (PDA), the symbols allowed in the stack alphabet are:

1. Input symbols: These are the symbols that the PDA reads from the input string. They are pushed onto the stack and later popped off.

2. Grammar variables: These are the non-terminal symbols in the grammar. They are used to generate strings in the language defined by the grammar. In the PDA, they are pushed onto the stack and later replaced by the right-hand side of a production rule.

3. $: This is a special symbol used to indicate the bottom of the stack. It is pushed onto the stack at the beginning of the computation and signals the PDA when to accept the input string.

4. Grammar rules: These are not typically considered part of the stack alphabet in a PDA. Instead, they define the transitions between states in the PDA. When a grammar variable is popped from the stack, the PDA uses the grammar rules to determine which state to transition to and what symbols to push onto the stack.

Question

In the standard simulation of a grammar by a Pushdown Automaton (PDA), the symbols allowed in the stack alphabet are:

1. Input symbols: These are the symbols that the PDA reads from the input string. They are pushed onto the stack and later popped off.

2. Grammar variables: These are the non-terminal symbols in the grammar. They are used to generate strings in the language defined by the grammar. In the PDA, they are pushed onto the stack and later replaced by the right-hand side of a production rule.

3. $: This is a special symbol used to indicate the bottom of the stack. It is pushed onto the stack at the beginning of the computation and signals the PDA when to accept the input string.

4. Grammar rules: These are not typically considered part of the stack alphabet in a PDA. Instead, they define the transitions between states in the PDA. When a grammar variable is popped from the stack, the PDA uses the grammar rules to determine which state to transition to and what symbols to push onto the stack.

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In the standard simulation of a grammar by a Pushdown Automaton (PDA), the symbols allowed in the stack alphabet are:

1. Input symbols: These are the symbols that the PDA reads from the input string. They are pushed onto the stack and later popped off.

2. Grammar variables: These are the non-terminal symbols in the grammar. They are used to generate strings in the language defined by the grammar. In the PDA, they are pushed onto the stack and later replaced by the right-hand side of a production rule.

3. $: This is a special symbol used to indicate the bottom of the stack. It is pushed onto the stack at the beginning of the computation and signals the PDA when to accept the input string.

4. Grammar rules: These are not typically considered part of the stack alphabet in a PDA. Instead, they define the transitions between states in the PDA. When a grammar variable is popped from the stack, the PDA uses the grammar rules to determine which state to transition to and what symbols to push onto the stack.

In the standard simulation of a grammar by a PDA, what are the symbols allowed in the stack alphabet1 pointInput symbolsGrammar variables$Grammar rules

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In the standard simulation of a grammar by a PDA, what are the symbols allowed in the stack alphabet?

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