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JSC
2010
99views more  JSC 2010»
14 years 8 months ago
Faster algorithms for computing Hong's bound on absolute positiveness
We show how to compute Hong’s bound for the absolute positiveness of a polynomial in d variables with maximum degree δ in O(n logd n) time, where n is the number of non-zero co...
Kurt Mehlhorn, Saurabh Ray
SIAMMAX
2011
180views more  SIAMMAX 2011»
14 years 4 months ago
Computing Characteristic Polynomials from Eigenvalues
Abstract. This paper concerns the computation of the coefficients ck of the characteristic polynomial of a real or complex matrix A. We analyze the forward error in the coefficient...
Rizwana Rehman, Ilse C. F. Ipsen
FOCS
2008
IEEE
15 years 4 months ago
Fast Modular Composition in any Characteristic
We give an algorithm for modular composition of degree n univariate polynomials over a finite field Fq requiring n1+o(1) log1+o(1) q bit operations; this had earlier been achiev...
Kiran S. Kedlaya, Christopher Umans
STOC
2010
ACM
186views Algorithms» more  STOC 2010»
15 years 2 months ago
Faster approximation schemes for fractional multicommodity flow problems via dynamic graph algorithms
We combine the work of Garg and K¨onemann, and Fleischer with ideas from dynamic graph algorithms to obtain faster (1 − ε)-approximation schemes for various versions of the mu...
Aleksander Madry
ANTS
2008
Springer
93views Algorithms» more  ANTS 2008»
14 years 11 months ago
Faster Multiplication in GF(2)[x]
Abstract. In this paper, we discuss an implementation of various algorithms for multiplying polynomials in GF(2)[x]: variants of the window methods, Karatsuba's, Toom-Cook...
Richard P. Brent, Pierrick Gaudry, Emmanuel Thom&e...