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MFCS
2004
Springer
14 years 1 months ago
All Superlinear Inverse Schemes Are coNP-Hard
How hard is it to invert NP-problems? We show that all superlinearly certified inverses of NP problems are coNP-hard. To do so, we develop a novel proof technique that builds dia...
Edith Hemaspaandra, Lane A. Hemaspaandra, Harald H...
PROCEDIA
2010
123views more  PROCEDIA 2010»
13 years 6 months ago
Mean square convergence of a semidiscrete scheme for SPDEs of Zakai type driven by square integrable martingales
In this short note, a direct proof of L2 convergence of an Euler–Maruyama approximation of a Zakai equation driven by a square integrable martingale is shown. The order of conve...
Annika Lang
MST
2010
106views more  MST 2010»
13 years 6 months ago
Constrained-Path Labellings on Graphs of Bounded Clique-Width
Given a graph G we consider the problem of preprocessing it so that given two vertices x,y and a set X of vertices, we can efficiently report the shortest path (or just its length...
Bruno Courcelle, Andrew Twigg
IJISMD
2010
135views more  IJISMD 2010»
13 years 5 months ago
On the Usage of Labels and Icons in Business Process Modeling
The value of business process models is dependent not only on the choice of graphical elements in the model, but also on their annotation with additional textual and graphical inf...
Jan Mendling, Jan Recker, Hajo A. Reijers
CORR
2008
Springer
112views Education» more  CORR 2008»
13 years 8 months ago
Compact Labelings For Efficient First-Order Model-Checking
We consider graph properties that can be checked from labels, i.e., bit sequences, of logarithmic length attached to vertices. We prove that there exists such a labeling for check...
Bruno Courcelle, Cyril Gavoille, Mamadou Moustapha...