Search Results - "Rojas, J. Maurice"
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Counting Real Roots in Polynomial-Time via Diophantine Approximation
Published in Foundations of computational mathematics (01-04-2024)“…Suppose A = { a 1 , … , a n + 2 } ⊂ Z n has cardinality n + 2 , with all the coordinates of the a j having absolute value at most d , and the a j do not all…”
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Practical conversion from torsion space to Cartesian space for in silico protein synthesis
Published in Journal of computational chemistry (30-07-2005)“…Many applications require a method for translating a large list of bond angles and bond lengths to precise atomic Cartesian coordinates. This simple but…”
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Computing zeta functions of large polynomial systems over finite fields
Published in Journal of Complexity (01-12-2022)“…We improve the algorithms of Lauder-Wan [11] and Harvey [8] to compute the zeta function of a system of m polynomial equations in n variables, over the q…”
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Optimizing n-variate (n+k)-nomials for small k
Published in Theoretical computer science (01-04-2011)“…We give a high precision polynomial-time approximation scheme for the supremum of any honest n-variate (n+2)-nomial with a constant term, allowing real…”
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Correction to: Tropical varieties for exponential sums
Published in Mathematische annalen (2021)“…A correction to this paper has been published: https ://doi.org/10.1007/s00208-019-01808-5 A subsidiary result (Theorem 1.1, on the undecidability of…”
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Probabilistic Condition Number Estimates for Real Polynomial Systems I: A Broader Family of Distributions
Published in Foundations of computational mathematics (01-02-2019)“…We consider the sensitivity of real roots of polynomial systems with respect to perturbations of the coefficients. In particular—for a version of the condition…”
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7
Tropical varieties for exponential sums
Published in Mathematische annalen (01-08-2020)“…We study the complexity of approximating complex zero sets of certain n -variate exponential sums. We show that the real part, R , of such a zero set can be…”
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Sparse univariate polynomials with many roots over finite fields
Published in Finite fields and their applications (01-07-2017)“…Suppose q is a prime power and f∈Fq[x] is a univariate polynomial with exactly t monomial terms and degree <q−1. To establish a finite field analogue of…”
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Counting Real Connected Components of Trinomial Curve Intersections and m -nomial Hypersurfaces
Published in Discrete & computational geometry (01-09-2003)“…We prove that any pair of bivariate trinomials has at most five isolated roots in the positive quadrant. The best previous upper bounds independent of the…”
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Root repulsion and faster solving for very sparse polynomials over p-adic fields
Published in Journal of number theory (01-12-2022)“…For any fixed field K∈{Q2,Q3,Q5,…}, we prove that all univariate polynomials f with exactly 3 (resp. 2) monomial terms, degree d, and all coefficients in…”
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Tropical Varieties for Exponential Sums
Published 21-04-2021“…Mathematische Annalen, Vol. 377, pp. 863-882 (2020) We study the complexity of approximating complex zero sets of certain $n$-variate exponential sums. We show…”
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Arithmetic Multivariate Descartes' Rule
Published in American journal of mathematics (01-02-2004)“…Let L be any number field or p-adic field and consider F:=(f1,...,fk) where f1,...,fk ΕL[x1, . . . ,xn] and no more than µ, distinct exponent vectors occur in…”
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Counting Roots of Polynomials Over Prime Power Rings
Published 03-11-2017“…Open Book Series 2 (2019) 191-205 Suppose $p$ is a prime, $t$ is a positive integer, and $f\!\in\!\mathbb{Z}[x]$ is a univariate polynomial of degree $d$ with…”
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14
Probabilistic Condition Number Estimates For Real Polynomial Systems I: A Broader Family Of Distributions
Published 05-06-2017“…FOCM 2018 We consider the sensitivity of real roots of polynomial systems with respect to perturbations of the coefficients. In particular - for a version of…”
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15
On the BCSS Proof of the Fundamental Theorem of Algebra
Published 17-06-2024“…Section 10.4 of the 1998 Springer-Verlag book {\em Complexity and Real Computation}, by Blum, Cucker, Shub, and Smale, contains a particularly elegant proof of…”
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On the complexity of diophantine geometry in low dimensions
Published in Proceedings. Fourteenth Annual IEEE Conference on Computational Complexity (Formerly: Structure in Complexity Theory Conference) (Cat.No.99CB36317) (1999)“…We consider the average-case complexity of some otherwise undecidable or open Diophantine problems. More precisely, we show that the following two problems can…”
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Counting Real Roots in Polynomial-Time for Systems Supported on Circuits
Published 09-12-2020“…Suppose $A=\{a_1,\ldots,a_{n+2}\}\subset\mathbb{Z}^n$ has cardinality $n+2$, with all the coordinates of the $a_j$ having absolute value at most $d$, and the…”
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Optimizing n-variate (n + k)-nomials for small k: Symbolic and Numerical Algorithms
Published in Theoretical computer science (2011)Get full text
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Faster p-adic feasibility for certain multivariate sparse polynomials
Published in Journal of symbolic computation (01-04-2012)“…We present algorithms revealing new families of polynomials admitting sub-exponential detection of p-adic rational roots, relative to the sparse encoding. For…”
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Root Repulsion and Faster Solving for Very Sparse Polynomials Over $p$-adic Fields
Published 19-07-2021“…For any fixed field $K\!\in\!\{\mathbb{Q}_2,\mathbb{Q}_3,\mathbb{Q}_5, \ldots\}$, we prove that all polynomials $f\!\in\!\mathbb{Z}[x]$ with exactly $3$ (resp…”
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