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CORR
2007
Springer
143views Education» more  CORR 2007»
15 years 1 months ago
An Approximation Algorithm for Shortest Descending Paths
A path from s to t on a polyhedral terrain is descending if the height of a point p never increases while we move p along the path from s to t. No efficient algorithm is known to ...
Mustaq Ahmed, Anna Lubiw
CORR
2008
Springer
103views Education» more  CORR 2008»
15 years 1 months ago
The Capacity Region of the Degraded Finite-State Broadcast Channel
We consider the discrete, time-varying broadcast channel with memory, under the assumption that the channel states belong to a set of nite cardinality. We begin with the de nition...
Ron Dabora, Andrea J. Goldsmith
ICDT
2012
ACM
251views Database» more  ICDT 2012»
13 years 4 months ago
Computing universal models under guarded TGDs
A universal model of a database D and a set Σ of integrity constraints is a database that extends D, satisfies Σ, and is most general in the sense that it contains sound and co...
André Hernich
COMPGEOM
1994
ACM
15 years 5 months ago
Computing Envelopes in Four Dimensions with Applications
Let F be a collection of n d-variate, possibly partially defined, functions, all algebraic of some constant maximum degree. We present a randomized algorithm that computes the vert...
Pankaj K. Agarwal, Boris Aronov, Micha Sharir
129
Voted
PPDP
2010
Springer
14 years 11 months ago
Rewrite-based verification of XML updates
We propose a model for XML update primitives of the W3C XQuery Update Facility as parameterized rewriting rules of the form: "insert an unranked tree from a regular tree lang...
Florent Jacquemard, Michaël Rusinowitch