Complexity Theory - Part 2

Polynomial Verification:




Graphical representation of the complexity classes

Procedure for proof:

  1. Prove L ϵ NP.
  2. Select a known NP-complete language L’.
  3. Describe an algorithm that computes a function f mapping every instance x ϵ {0, 1}* of L’ to an instance f(x) of L.
  4. Prove that the function f satisfies x ϵ L’ iff f(x) ϵ L for all x ϵ {0,1}*.
  5. Prove that the algorithm computing f runs in polynomial time.

Decision vs Optimization Problems:





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