On the topology of algorithms, I
Journal of Complexity
Some algebraic and geometric computations in PSPACE
STOC '88 Proceedings of the twentieth annual ACM symposium on Theory of computing
Algorithmic number theory
Sylvester—Habicht sequences and fast Cauchy index computation
Journal of Symbolic Computation
On solving univariate sparse polynomials in logarithmic time
Journal of Complexity - Special issue: Foundations of computational mathematics 2002 workshops
Algorithms in Real Algebraic Geometry (Algorithms and Computation in Mathematics)
Algorithms in Real Algebraic Geometry (Algorithms and Computation in Mathematics)
Optimization and NP_R-completeness of certain fewnomials
Proceedings of the 2009 conference on Symbolic numeric computation
Randomized NP-completeness for p-adic rational roots of sparse polynomials in one variable
Proceedings of the 2010 International Symposium on Symbolic and Algebraic Computation
Optimizing n-variate (n+k)-nomials for small k
Theoretical Computer Science
Faster p-adic feasibility for certain multivariate sparse polynomials
Journal of Symbolic Computation
Sub-linear root detection, and new hardness results, for sparse polynomials over finite fields
Proceedings of the 38th international symposium on International symposium on symbolic and algebraic computation
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We show that detecting real roots for honestly n-variate (n+2)-nomials with integer exponents and coefficients) can be done in time polynomial in the sparse encoding for any fixed nn. The best previous complexity bounds were exponential in the sparse encoding, even for n fixed. We then give a characterization of those functions k(n) such that the complexity of detecting real roots for n-variate(n+k(n))-nomials transitions from P to NP-hardness as n → ∞. Our proofs follow in large part from a new complexity threshold for deciding the vanishing of A-discriminants of n-variate (n+k(n))-nomials. Diophantine approximation, through linear forms in logarithms, also arises as a key tool.