# Turing Machine

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Let B be a probabilistic polynomial time Turing machine and let C be a language where, for some fixed 0 < 1 < 2 < 1,

a. w  C implies Pr [B accepts w]  1, and

b. w  C implies Pr [B accepts w]  2.

Show that C  BPP. HINT:

Use Lemma 10.5 to help you find the solution.

See attached file for full problem description.

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#### Solution Preview

The basic idea is to reach at a stage where we can use the lemma 10.5. That is we need to reduce the error probability. A most useful tool in this is is the Chernoff bound. Chernoff bound is used to ...

#### Solution Summary

Turing Machine inquiry is presented.

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