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CSR
2007
Springer
16 years 25 days ago
Ruling Out Polynomial-Time Approximation Schemes for Hard Constraint Satisfaction Problems
The maximum constraint satisfaction problem (Max CSP) is the following computational problem: an instance is a finite collection of constraints on a set of variables, and the goal...
Peter Jonsson, Andrei A. Krokhin, Fredrik Kuivinen
STACS
2007
Springer
16 years 23 days ago
On Fixed Point Equations over Commutative Semirings
Fixed point equations x = f(x) over ω-continuous semirings can be seen as the mathematical foundation of interprocedural program analysis. The sequence 0, f(0), f2 (0), . . . conv...
Javier Esparza, Stefan Kiefer, Michael Luttenberge...
CW
2006
IEEE
16 years 22 days ago
A New Method for Developing Business Applications: The Cellular Data System
Currently, in the development of business applications, difficulties occasionally arise between the customer side and the supplier side, causing delays and higher development cost...
Toshio Kodama, Tosiyasu L. Kunii, Yoichi Seki
FOCS
2006
IEEE
16 years 22 days ago
On a Geometric Generalization of the Upper Bound Theorem
We prove an upper bound, tight up to a factor of 2, for the number of vertices of level at most in an arrangement of n halfspaces in Rd , for arbitrary n and d (in particular, the...
Uli Wagner
COCO
2005
Springer
128views Algorithms» more  COCO 2005»
16 years 6 days ago
More on Noncommutative Polynomial Identity Testing
We continue the study of noncommutative polynomial identity testing initiated by Raz and Shpilka and present efficient algorithms for the following problems in the noncommutative...
Andrej Bogdanov, Hoeteck Wee