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The theory of parameterized computation and complexity is a recentlydeveloped subarea in theoretical computer science. The theory is aimed at practically solving alarge number of computational problems that are theore...
the National Natural Science Foundation of China (Nos.69873027, 60073042).
The paper briefly reviews NP-hard optimization problems and their inapproximability. The hardness of solving CLIQUE problem is specifically dis- cussed. A dynamic-programming algorithm and its improved version for CLI...