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SIAMCOMP
2008
86views more  SIAMCOMP 2008»
13 years 4 months ago
The Complexity of Monadic Second-Order Unification
Abstract. Monadic second-order unification is second-order unification where all function constants occurring in the equations are unary. Here we prove that the problem of deciding...
Jordi Levy, Manfred Schmidt-Schauß, Mateu Vi...
SIAMCOMP
2008
60views more  SIAMCOMP 2008»
13 years 4 months ago
Improved Approximation Algorithms for Minimum Weight Vertex Separators
Uriel Feige, MohammadTaghi Hajiaghayi, James R. Le...
SIAMCOMP
2008
65views more  SIAMCOMP 2008»
13 years 4 months ago
Exact Algorithms for Treewidth and Minimum Fill-In
We show that the treewidth and the minimum fill-in of an n-vertex graph can be
Fedor V. Fomin, Dieter Kratsch, Ioan Todinca, Yngv...
SIAMCOMP
2008
45views more  SIAMCOMP 2008»
13 years 4 months ago
The Spectral Method for General Mixture Models
Ravindran Kannan, Hadi Salmasian, Santosh Vempala
SIAMCOMP
2008
130views more  SIAMCOMP 2008»
13 years 4 months ago
Short PCPs with Polylog Query Complexity
We give constructions of probabilistically checkable proofs (PCPs) of length n
Eli Ben-Sasson, Madhu Sudan
SIAMCOMP
2008
84views more  SIAMCOMP 2008»
13 years 4 months ago
Resolution Is Not Automatizable Unless W[P] Is Tractable
We show that neither Resolution nor tree-like Resolution is automatizable unless the class W[P] from the hierarchy of parameterized problems is fixed-parameter tractable by randomi...
Michael Alekhnovich, Alexander A. Razborov
SIAMCOMP
2008
100views more  SIAMCOMP 2008»
13 years 4 months ago
On the Complexity of Verifying Consistency of XML Specifications
XML specifications often consist of a type definition (typically, a DTD) and a set of integrity constraints. It has been shown previously that such specifications can be inconsiste...
Marcelo Arenas, Wenfei Fan, Leonid Libkin
SIAMCOMP
2008
137views more  SIAMCOMP 2008»
13 years 4 months ago
Approximate Shortest Paths in Anisotropic Regions
Our goal is to find an approximate shortest path for a point robot moving in a planar subdivision with n vertices. Let 1 be a real number. Distances in each face of this subdivis...
Siu-Wing Cheng, Hyeon-Suk Na, Antoine Vigneron, Ya...
SIAMCOMP
2008
72views more  SIAMCOMP 2008»
13 years 4 months ago
Plottable Real Number Functions and the Computable Graph Theorem
The Graph Theorem of classical recursion theory states that a total function on the natural numbers is computable, if and only if its graph is recursive. It is known that this res...
Vasco Brattka