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answers:

4

What is the best book for a student learning about concepts such as NP-hard, NP-complete and P=?NP?

I've already got the CLR but it doesn't really cover these particular topics as thoroughly.

+1  A: 

Any textbook on computability and complexity would be useful. Introduction to the Theory of Computation by Sisper is a good one.

Also there are lots of good resources if you google those terms - this is a common undergrad course and many professors post class notes online.

David
A: 

Computers and Intractability: A Guide to the Theory of NP-Completeness by Michael Garey and David S. Johnson. is a classic (1979).

anno
+1  A: 

Introduction to Algorithms by Thomas Cormen is a very good book on Algorithms and also there is The Algorithm Design Manual

Rachel
Introduction to Algorithms is very good.
Ralf
A: 

Introduction to Algorithms has a very good chapter on NP-completeness and tractability, and it's the one I usually recommend to my students.

Garey & Johnson's guide is basically list of the known NP-complete problems, and while certainly useful as a reference book, I wouldn't recommend it as an introduction.

olaan