Algorithms in Real Algebraic GeometrySpringer Science & Business Media, 21. apr. 2007 - 662 sider The algorithmic problems of real algebraic geometry such as real root counting, deciding the existence of solutions of systems of polynomial equations and inequalities, finding global maxima or deciding whether two points belong in the same connected component of a semi-algebraic set appear frequently in many areas of science and engineering. In this textbook the main ideas and techniques presented form a coherent and rich body of knowledge. Mathematicians will find relevant information about the algorithmic aspects. Researchers in computer science and engineering will find the required mathematical background. Being self-contained the book is accessible to graduate students and even, for invaluable parts of it, to undergraduate students. This second edition contains several recent results, on discriminants of symmetric matrices, real root isolation, global optimization, quantitative results on semi-algebraic sets and the first single exponential algorithm computing their first Betti number. |
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... ( resp . ab ) for ba ( resp . b < a ) . An ordered ring ( A , ≤ ) is a ring , A , together with a total order , ≤ , that satisfies : xy⇒ x + z≤ y + z 0x , 0 ≤y ⇒ 0≤xy . An ordered field ( F , ≤ ) is a field , F , which is an ...
... ( resp . negative ) over ( a , b ) , then P is increasing ( resp . decreasing ) over [ a , b ] . The following Proposition 2.28 ( Basic Thom's Lemma ) which will have important consequences in Chapter 10. We first need a few definitions ...
... P1 ; a , b ) , Ind ( -R / Q ; a , b ) = Ind ( -R1 / Q1 ; a , b ) , and the signs of P ( x ) Q ( x ) and P1 ( x ) Q1 ( x ) coincide at any point which is not a root of PQ . Let n− + ( resp . n + - ) 2.2 Real Root Counting 55.
... ( resp . n + - ) denote the number of sign variations from −1 to 1 ( resp . from 1 to -1 ) of PQ when x varies from a to b . It is clear that = { o ( b ) if o ( a ) o ( b ) = -1 0 if σ ( a ) σ ( b ) = 1 . It follows from the definition ...
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Indhold
1 | |
43 | |
94 | 77 |
3 | 83 |
Algebra | 100 |
པ | 159 |
213 | 183 |
Elements of Topology | 195 |
Real Roots | 365 |
Cylindrical Decomposition Algorithm | 402 |
Polynomial System Solving | 445 |
Existential Theory of the Reals | 505 |
Quantifier Elimination | 533 |
Computing Roadmaps and Connected Components of Alge | 564 |
Computing Roadmaps and Connected Components of Semi | 593 |
References | 635 |
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