Sciweavers

787 search results - page 2 / 158
» Polynomial Constants are Decidable
Sort
View
ICALP
2005
Springer
13 years 10 months ago
Time-Space Lower Bounds for the Polynomial-Time Hierarchy on Randomized Machines
We establish the first polynomial-strength time-space lower bounds for problems in the lineartime hierarchy on randomized machines with two-sided error. We show that for any inte...
Scott Diehl, Dieter van Melkebeek
SIAMDM
2008
100views more  SIAMDM 2008»
13 years 4 months ago
Tree-Related Widths of Graphs and Hypergraphs
A hypergraph pair is a pair (G, H) where G and H are hypergraphs on the same set of vertices. We extend the definitions of hypertree-width [7] and generalised hypertree-width [8] ...
Isolde Adler
IJAC
2007
59views more  IJAC 2007»
13 years 4 months ago
Polynomial-Time Complexity for Instances of the Endomorphism Problem in Free Groups
Abstract. We say the endomorphism problem is solvable for an element W in a free group F if it can be decided effectively whether, given U in F , there is an endomorphism φ of F ...
Laura Ciobanu
CORR
2010
Springer
163views Education» more  CORR 2010»
13 years 1 months ago
NP-hardness of Deciding Convexity of Quartic Polynomials and Related Problems
We show that unless P=NP, there exists no polynomial time (or even pseudo-polynomial time) algorithm that can decide whether a multivariate polynomial of degree four (or higher ev...
Amir Ali Ahmadi, Alexander Olshevsky, Pablo A. Par...
ITA
2007
153views Communications» more  ITA 2007»
13 years 4 months ago
Deciding inclusion of set constants over infinite non-strict data structures
Abstract. Various static analyses of functional programming languages that permit infinite data structures make use of set constants like Top, Inf, and Bot, denoting all terms, al...
Manfred Schmidt-Schauß, David Sabel, Marko S...