Question: Prove or disprove the fallowing statements: (a) Stacks are getting expensive lately! I limit my PDAs to only have a maximum stack height of 50,

Prove or disprove the fallowing statements: (a) Stacks are getting expensive

Prove or disprove the fallowing statements: (a) Stacks are getting expensive lately! I limit my PDAs to only have a maximum stack height of 50, and if during a computation the PDA tries to push on a stack with height of 50, the computation terminates. My model of PDAs then still recognizes the co languages. (b) The energy it is taking for PDAs to take a transition where it reads off of the input is increasing, so it may be a good idea to allow "breaks" between them. I want every accepting computation of every string to consist of at least 1 epsilon-transition between each character read from the input, without worrying about what happens to the stack. Call these machines epsilon-PDAs. Then epsilon-PDAs still recognize the context-free languages

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