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» Decorous Lower Bounds for Minimum Linear Arrangement
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MFCS
2001
Springer
13 years 11 months ago
On the Approximability of the Steiner Tree Problem
We show that it is not possible to approximate the minimum Steiner tree problem within 1 + 1 162 unless RP = NP. The currently best known lower bound is 1 + 1 400. The reduction i...
Martin Thimm
TIT
2010
160views Education» more  TIT 2010»
13 years 1 months ago
Bounds on the rate of 2-D bit-stuffing encoders
A method for bounding the rate of bit-stuffing encoders for 2-D constraints is presented. Instead of considering the original encoder, we consider a related one which is quasistati...
Ido Tal, Ron M. Roth
ISPD
2004
ACM
189views Hardware» more  ISPD 2004»
14 years 3 days ago
Almost optimum placement legalization by minimum cost flow and dynamic programming
VLSI placement tools usually work in two steps: First, the cells that have to be placed are roughly spread out over the chip area ignoring disjointness (global placement). Then, i...
Ulrich Brenner, Anna Pauli, Jens Vygen
JCSS
2008
96views more  JCSS 2008»
13 years 6 months ago
A combinatorial characterization of resolution width
We provide a characterization of the resolution width introduced in the context of propositional proof complexity in terms of the existential pebble game introduced in the context...
Albert Atserias, Víctor Dalmau
STOC
1992
ACM
110views Algorithms» more  STOC 1992»
13 years 10 months ago
Linear Decision Trees: Volume Estimates and Topological Bounds
Abstract. We describe two methods for estimating the size and depth of decision trees where a linear test is performed at each node. Both methods are applied to the question of dec...
Anders Björner, László Lov&aacu...