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ICALP
2010
Springer
14 years 27 days ago
On the Inapproximability of Vertex Cover on k-Partite k-Uniform Hypergraphs
Computing a minimum vertex cover in graphs and hypergraphs is a well-studied optimizaton problem. While intractable in general, it is well known that on bipartite graphs, vertex c...
Venkatesan Guruswami, Rishi Saket
IEICET
2011
13 years 3 months ago
Generation of Symmetric and Asymmetric Biconnected Rooted Outerplanar Graphs
In a rooted graph, a vertex is designated as its root. An outerplanar graph is represented by a plane embedding such that all vertices appear along its outer boundary. Two differ...
Bingbing Zhuang, Hiroshi Nagamochi
ICDE
2005
IEEE
107views Database» more  ICDE 2005»
14 years 9 months ago
Spatiotemporal Annotation Graph (STAG): A Data Model for Composite Digital Objects
In this demonstration, we present a database over complex documents, which, in addition to a structured text content, also has update information, annotations, and embedded object...
Smriti Yamini, Amarnath Gupta
STOC
2005
ACM
147views Algorithms» more  STOC 2005»
14 years 8 months ago
Simulating independence: new constructions of condensers, ramsey graphs, dispersers, and extractors
We present new explicit constructions of deterministic randomness extractors, dispersers and related objects. We say that a distribution X on binary strings of length n is a -sour...
Boaz Barak, Guy Kindler, Ronen Shaltiel, Benny Sud...
CCCG
2009
13 years 9 months ago
On Directed Graphs with an Upward Straight-line
In this paper we study the problem of computing an upward straight-line embedding of a directed graph G into a point set S, i.e. a planar drawing of G such that each vertex is map...
Carla Binucci, Emilio Di Giacomo, Walter Didimo, A...