Greatest common divisors of polynomials given by straight-line programs
Journal of the ACM (JACM)
The complexity of linear problems in fields
Journal of Symbolic Computation
Real quantifier elimination is doubly exponential
Journal of Symbolic Computation
Journal of Symbolic Computation
ISSAC '92 Papers from the international symposium on Symbolic and algebraic computation
On the combinatorial and algebraic complexity of quantifier elimination
Journal of the ACM (JACM)
REDLOG: computer algebra meets computer logic
ACM SIGSAM Bulletin
Guaranteed solution formula construction
ISSAC '99 Proceedings of the 1999 international symposium on Symbolic and algebraic computation
Journal of the ACM (JACM)
Simple CAD construction and its applications
Journal of Symbolic Computation
A New Approach for Automatic Theorem Proving in Real Geometry
Journal of Automated Reasoning
Additive Complexity and Roots of Polynomials over Number Fields and \mathfrak{p} -adic Fields
ANTS-V Proceedings of the 5th International Symposium on Algorithmic Number Theory
The complexity of the equivalence problem for straight-line programs
STOC '80 Proceedings of the twelfth annual ACM symposium on Theory of computing
A generic projection operator for partial cylindrical algebraic decomposition
ISSAC '03 Proceedings of the 2003 international symposium on Symbolic and algebraic computation
Efficient projection orders for CAD
ISSAC '04 Proceedings of the 2004 international symposium on Symbolic and algebraic computation
Adherence is better than adjacency: computing the Riemann index using CAD
Proceedings of the 2005 international symposium on Symbolic and algebraic computation
Computing cylindrical algebraic decomposition via triangular decomposition
Proceedings of the 2009 international symposium on Symbolic and algebraic computation
Black-box/white-box simplification and applications to quantifier elimination
Proceedings of the 2010 International Symposium on Symbolic and Algebraic Computation
A spatial search framework for executing perceptions and actions in diagrammatic reasoning
Diagrams'10 Proceedings of the 6th international conference on Diagrammatic representation and inference
A constraint satisfaction framework for executing perceptions and actions in diagrammatic reasoning
Journal of Artificial Intelligence Research
Integrating ICP and LRA solvers for deciding nonlinear real arithmetic problems
Proceedings of the 2010 Conference on Formal Methods in Computer-Aided Design
Differential dynamic logics: automated theorem proving for hybrid systems
Differential dynamic logics: automated theorem proving for hybrid systems
δ-complete decision procedures for satisfiability over the reals
IJCAR'12 Proceedings of the 6th international joint conference on Automated Reasoning
Delta-Decidability over the Reals
LICS '12 Proceedings of the 2012 27th Annual IEEE/ACM Symposium on Logic in Computer Science
Triangular decomposition of semi-algebraic systems
Journal of Symbolic Computation
Computing with semi-algebraic sets: Relaxation techniques and effective boundaries
Journal of Symbolic Computation
Cylindrical algebraic decompositions for boolean combinations
Proceedings of the 38th international symposium on International symposium on symbolic and algebraic computation
Optimising problem formulation for cylindrical algebraic decomposition
CICM'13 Proceedings of the 2013 international conference on Intelligent Computer Mathematics
Hi-index | 0.00 |
This paper has two parts. In the first part we give a simple and constructive proof that quantifier elimination in real algebra is doubly exponential, even when there is only one free variable and all polynomials in the quantified input are linear. The general result is not new, but we hope the simple and explicit nature of the proof makes it interesting. The second part of the paper uses the construction of the first part to prove some results on the effects of projection order on CAD construction -- roughly that there are CAD construction problems for which one order produces a constant number of cells and another produces a doubly exponential number of cells, and that there are problems for which all orders produce a doubly exponential number of cells. The second of these results implies that there is a true singly vs. doubly exponential gap between the worst-case running times of several modern quantifier elimination algorithms and CAD-based quantifier elimination when the number of quantifier alternations is constant.