The Complexity Theory Companion LAne A . H e m a s p a m a d r a a n d M i t s l m o r i O g i h a r a University of Rochester, Rochester~ NY (~) 2002, Springer-Verlag ISBN 3-540-67419-5, Release date: D e c e m b e r 16, 2001 Web site: h t t p : / / ~ w , c s . r o c h e s t e r , e d u / u / l a n e / f c o m p a n i o n / / Preface (Abridged) Invitation Secret 1 Algorith~r~sare at the heart of comple~ty theory. T h a t is t h e dark secret of complexity theory. It is recognized by complexity theorists, b u t would be literally incredible to most others. I n this book, we h o p e to m a k e this secret credible. In fact, t h e real secret is even more dramatic. Secret 2 ~imple algorithms are a~ the heart o/comple.citll theory. A corollary of Secret 2 is t h a t every
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