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SIAMDM
2000
69views more  SIAMDM 2000»
13 years 10 months ago
Bounds for Dispersers, Extractors, and Depth-Two Superconcentrators
We show that the size of the smallest depth-two N-superconcentrator is (N log2 N/ log log N). Before this work, optimal bounds were known for all depths except two. For the upper b...
Jaikumar Radhakrishnan, Amnon Ta-Shma
SIAMDM
2000
77views more  SIAMDM 2000»
13 years 10 months ago
Recognizing Perfect 2-Split Graphs
A graph is a split graph if its vertices can be partitioned into a clique and a stable set. A graph is a k-split graph if its vertices can be partitioned into k sets, each of which...
Chính T. Hoàng, Van Bang Le
SIAMDM
2000
65views more  SIAMDM 2000»
13 years 10 months ago
Two-Dimensional Gantt Charts and a Scheduling Algorithm of Lawler
Michel X. Goemans, David P. Williamson
SIAMDM
2000
159views more  SIAMDM 2000»
13 years 10 months ago
Approximating Fractional Multicommodity Flow Independent of the Number of Commodities
Abstract. We describe fully polynomial time approximation schemes for various multicommodity flow problems in graphs with m edges and n vertices. We present the first approximation...
Lisa Fleischer
SIAMDM
2000
103views more  SIAMDM 2000»
13 years 10 months ago
Directional Routing via Generalized st-Numberings
We present a mathematical model for network routing based on generating paths in a consistent direction. Our development is based on an algebraic and geometric framework for defini...
Fred S. Annexstein, Kenneth A. Berman
SIAMDM
2000
59views more  SIAMDM 2000»
13 years 10 months ago
Nonhamiltonian 3-Connected Cubic Planar Graphs
We establish that every cyclically 4-connected cubic planar graph of order at most 40 is hamiltonian. Furthermore, this bound is determined to be sharp and we present all nonhamil...
Robert E. L. Aldred, S. Bau, Derek A. Holton, Bren...