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CORR
2002
Springer
91views Education» more  CORR 2002»
15 years 4 months ago
Quantum Random Walks Hit Exponentially Faster
We show that the hitting time of the discrete time quantum random walk on the n-bit hypercube from one corner to its opposite is polynomial in n. This gives the first exponential ...
Julia Kempe
ENTCS
2002
99views more  ENTCS 2002»
15 years 4 months ago
Greatest Bisimulations for Binary Methods
In previous work [14] I introduced a generalised notion of coalgebra that is capable of modelling binary methods as they occur in object-oriented programming. An important problem...
Hendrik Tews
DAM
1999
169views more  DAM 1999»
15 years 4 months ago
Approximating the Weight of Shallow Steiner Trees
This paper deals with the problem of constructing Steiner trees of minimum weight with diameter bounded by d, spanning a given set of vertices in a graph. Exact solutions or logar...
Guy Kortsarz, David Peleg
COLOGNETWENTE
2010
15 years 3 months ago
Complexity of O'Hara's Algorithm
In this paper we analyze O’Hara’s partition bijection. We present three type of results. First, we show that O’Hara’s bijection can be viewed geometrically as a certain sci...
Matjaz Konvalinka, Igor Pak
TCS
2010
15 years 2 months ago
Towards practical feasibility of core computation in data exchange
Abstract. Core computation in data exchange is concerned with materializing the minimal target database for a given source database. Gottlob and Nash have recently shown that the c...
Reinhard Pichler, Vadim Savenkov