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FOCS
2003
IEEE
15 years 10 months ago
Quantum Search of Spatial Regions
: Can Grover’s algorithm speed up search of a physical region—for example a 2-D grid of size √ n × √ n? The problem is that √ n time seems to be needed for each query, j...
Scott Aaronson, Andris Ambainis
STACS
2004
Springer
15 years 10 months ago
Lattices with Many Cycles Are Dense
Abstract We give a method for approximating any n-dimensional lattice with a lattice Λ whose factor group Zn /Λ has n − 1 cycles of equal length with arbitrary precision. We al...
Mårten Trolin
STACS
2004
Springer
15 years 10 months ago
Topology Matters: Smoothed Competitiveness of Metrical Task Systems
We consider metrical task systems, a general framework to model online problems. Borodin, Linial and Saks [BLS92] presented a deterministic work function algorithm (WFA) for metric...
Guido Schäfer, Naveen Sivadasan
STACS
2004
Springer
15 years 10 months ago
Active Context-Free Games
An Active Context-Free Game is a game with two players (Romeo and Juliet) on strings over a finite alphabet. In each move, Juliet selects a position of the current word and Romeo ...
Anca Muscholl, Thomas Schwentick, Luc Segoufin
STACS
2004
Springer
15 years 10 months ago
Desert Automata and the Finite Substitution Problem
d Abstract)⋆⋆ Daniel Kirsten LIAFA, Universit´e Denis Diderot – Case 7014, 2 place Jussieu, F-75251 Paris Cedex 05, France We give a positive solution to the so-called fini...
Daniel Kirsten
STACS
2004
Springer
15 years 10 months ago
A Lower Bound on the Competitive Ratio of Truthful Auctions
We study a class of single-round, sealed-bid auctions for a set of identical items. We adopt the worst case competitive framework defined by [1,2] that compares the profit of an ...
Andrew V. Goldberg, Jason D. Hartline, Anna R. Kar...
STACS
2004
Springer
15 years 10 months ago
On Minimum Circular Arrangement
Motivated by a scheduling problem encountered in multicast environments, we study a vertex labelling problem, called Directed Circular Arrangement (DCA), that requires one to fin...
Murali K. Ganapathy, Sachin Lodha
STACS
2004
Springer
15 years 10 months ago
Digraphs Exploration with Little Memory
Under the robot model, we show that a robot needs Ω(n log d) bits of memory to perform exploration of digraphs with n nodes and maximum out-degree d. We then describe an algorith...
Pierre Fraigniaud, David Ilcinkas