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WG
1993
Springer
15 years 10 months ago
Graphs, Hypergraphs and Hashing
Minimal perfect hash functions are used for memory efficient storage and fast retrieval of items from static sets. We present an infinite family of efficient and practical algori...
George Havas, Bohdan S. Majewski, Nicholas C. Worm...
STOC
1991
ACM
105views Algorithms» more  STOC 1991»
15 years 9 months ago
An Efficient Algorithm for the Genus Problem with Explicit Construction of Forbidden Subgraphs
act We give an algorithm for imbedding a graph G of n vertices onto an oriented surface of minimal genus g. If g > 0 then we also construct a forbidden subgraph of G which is ho...
Hristo Djidjev, John H. Reif
DAC
1997
ACM
15 years 10 months ago
A Graph-Based Synthesis Algorithm for AND/XOR Networks
In this paper, we introduce a Shared Multiple Rooted XORbased Decomposition Diagram XORDD to represent functions with multiple outputs. Based on the XORDD representation, we dev...
Yibin Ye, Kaushik Roy
ECCC
2007
147views more  ECCC 2007»
15 years 6 months ago
Inapproximability of edge-disjoint paths and low congestion routing on undirected graphs
In the undirected Edge-Disjoint Paths problem with Congestion (EDPwC), we are given an undirected graph with V nodes, a set of terminal pairs and an integer c. The objective is to...
Matthew Andrews, Julia Chuzhoy, Venkatesan Guruswa...
ICML
2003
IEEE
16 years 7 months ago
Semi-Supervised Learning Using Gaussian Fields and Harmonic Functions
An approach to semi-supervised learning is proposed that is based on a Gaussian random field model. Labeled and unlabeled data are represented as vertices in a weighted graph, wit...
Xiaojin Zhu, Zoubin Ghahramani, John D. Lafferty