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» Positive Versions of Polynomial Time
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SODA
1998
ACM
128views Algorithms» more  SODA 1998»
15 years 1 months ago
A Polynomial-Time Approximation Scheme for Weighted Planar Graph TSP
Given a planar graph on n nodes with costs weights on its edges, de ne the distance between nodes i and j as the length of the shortest path between i and j. Consider this as an i...
Sanjeev Arora, Michelangelo Grigni, David R. Karge...
ECCC
2000
77views more  ECCC 2000»
14 years 11 months ago
Polynomial-Time Recognition of Minimal Unsatisfiable Formulas with Fixed Clause-Variable Difference
A formula (in conjunctive normal form) is said to be minimal unsatisfiable if it is unsatisfiable and deleting any clause makes it satisfiable. The deficiency of a formula is the ...
Herbert Fleischner, Stefan Szeider
DLT
2010
15 years 1 months ago
Compressed Conjugacy and the Word Problem for Outer Automorphism Groups of Graph Groups
Abstract. It is shown that for graph groups (right-angled Artin groups) the conjugacy problem as well as a restricted version of the simultaneous conjugacy problem can be solved in...
Niko Haubold, Markus Lohrey, Christian Mathissen
94
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FOCS
1992
IEEE
15 years 3 months ago
Quadratic Dynamical Systems (Preliminary Version)
The main purpose of this paper is to promote the study of computational aspects, primarily the convergence rate, of nonlinear dynamical systems from a combinatorial perspective. W...
Yuri Rabinovich, Alistair Sinclair, Avi Wigderson
AIED
2005
Springer
15 years 5 months ago
Positive and negative verbal feedback for Intelligent Tutoring Systems
Abstract. We built three different versions of an ITS on a letter pattern extrapolation task: in one version, students only receive color-coded feedback; in the second, they receiv...
Barbara Di Eugenio, Xin Lu, Trina C. Kershaw, Andr...