Two Stack PDA | 2 stack PDA for a^n b^n c^n | TOC | Automata Theory

A Two-Stack Pushdown Automaton (Two-Stack PDA) is similar to a PDA, but it has two stacks instead of one. In each transition, we must denote the pop and push action on both stacks.

A typical pushdown automaton (PDA) has a Finite Automata along with a single stack.
It recognizes languages known as context-free languages.
If you add a second stack, it becomes much more powerful. Actually, it has the same power as a Turing Machine. And a Turing Machine can be built to compute anything that is computable.

Two-Stack PDA is a computational model based on the generalization of Pushdown Automata (PDA). Non-deterministic Two-Stack PDA is equivalent to a deterministic Two-Stack PDA. The move of the Two-Stack PDA is based on−The state of the finite control. −The input symbol read.−The top stack symbol on each of its stacks.


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