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GG
2004
Springer
15 years 9 months ago
Parallel Independence in Hierarchical Graph Transformation
Abstract. Hierarchical graph transformation as defined in [1, 2] extends double-pushout graph transformation in the spirit of term rewriting: Graphs are provided with hierarchical...
Annegret Habel, Berthold Hoffmann
189
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WG
2004
Springer
15 years 9 months ago
A Robust PTAS for Maximum Weight Independent Sets in Unit Disk Graphs
A unit disk graph is the intersection graph of unit disks in the euclidean plane. We present a polynomial-time approximation scheme for the maximum weight independent set problem i...
Tim Nieberg, Johann Hurink, Walter Kern
ESA
2006
Springer
137views Algorithms» more  ESA 2006»
15 years 7 months ago
Deciding Relaxed Two-Colorability - A Hardness Jump
A coloring is proper if each color class induces connected components of order one (where the order of a graph is its number of vertices). Here we study relaxations of proper two-c...
Robert Berke, Tibor Szabó
FSTTCS
2010
Springer
15 years 2 months ago
Finding Independent Sets in Unions of Perfect Graphs
ABSTRACT. The maximum independent set problem (MAXIS) on general graphs is known to be NPhard to approximate within a factor of n1-, for any > 0. However, there are many "...
Venkatesan T. Chakaravarthy, Vinayaka Pandit, Samb...
ENDM
2008
120views more  ENDM 2008»
15 years 4 months ago
Connectivity check in 3-connected planar graphs with obstacles
Bruno Courcelle, Cyril Gavoille, Mamadou Moustapha...