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SIAMCOMP
1998
125views more  SIAMCOMP 1998»
14 years 11 months ago
Free Bits, PCPs, and Nonapproximability-Towards Tight Results
This paper continues the investigation of the connection between probabilistically checkable proofs (PCPs) and the approximability of NP-optimization problems. The emphasis is on p...
Mihir Bellare, Oded Goldreich, Madhu Sudan
ICALP
2010
Springer
15 years 4 months ago
Additive Spanners in Nearly Quadratic Time
We consider the problem of efficiently finding an additive C-spanner of an undirected unweighted graph G, that is, a subgraph H so that for all pairs of vertices u, v, δH (u, v) ...
David P. Woodruff
ICFP
2008
ACM
15 years 12 months ago
Efficient nondestructive equality checking for trees and graphs
The Revised6 Report on Scheme requires its generic equivalence predicate, equal?, to terminate even on cyclic inputs. While the terminating equal? can be implemented via a DFA-equ...
Michael D. Adams, R. Kent Dybvig
VEE
2010
ACM
218views Virtualization» more  VEE 2010»
15 years 6 months ago
Improving compiler-runtime separation with XIR
Intense research on virtual machines has highlighted the need for flexible software architectures that allow quick evaluation of new design and implementation techniques. The inte...
Ben Titzer, Thomas Würthinger, Doug Simon, Ma...
ASSETS
2009
ACM
15 years 6 months ago
Speaking through pictures: images vs. icons
People with aphasia, a condition that impairs the ability to understand or generate written or spoken language, are aided by assistive technology that helps them communicate throu...
Xiaojuan Ma, Jordan L. Boyd-Graber, Sonya S. Nikol...