Slide 1Part VI NP-Hardness Slide 2 Lecture 23 Whats NP? Slide 3 Hard Problems Slide 4 Answer What is NP-complete? What is NP-hard? First, what is NP? Slide 5 Answer 1 Wrong!…

Slide 1 Greedy Algorithm A greedy algorithm always makes the choice that looks best at the moment Key point: Greed makes a locally optimal choice in the hope that this choice…

NP-hardness and Phylogeny Reconstruction Tandy Warnow Department of Computer Sciences University of Texas at Austin Phylogeny Orangutan Gorilla Chimpanzee Human From the…

Lecture 6 NP Class P = ? NP = ? PSPACE They are central problems in computational complexity. If P = NP, then NP-complete P Ladner Theorem If NP ≠ P, then there exists…

Graph Partitioning Problems and Lasserre Hierarchy Lasserre Hierarchy, Higher Eigenvalues, and Graph Partitioning Venkatesan Guruswami Carnegie Mellon University --- Mysore…