152 search results - page 19 / 31 » Tetris is Hard, Even to Approximate |
ICDT
2009
ACM
14 years 8 months ago
2009
ACM
We continue the study of approximating the number of distinct elements in a data stream of length n to within a (1? ) factor. It is known that if the stream may consist of arbitra...
WWW
2009
ACM
14 years 8 months ago
2009
ACM
Ad auctions in sponsored search support"broad match"that allows an advertiser to target a large number of queries while bidding only on a limited number. While giving mo...
COMGEO
2012
ACM
12 years 3 months ago
2012
ACM
We study a class of multi-commodity flow problems in geometric domains: For a given planar domain P populated with obstacles (holes) of K ≥ 2 types, compute a set of thick path...
SIGECOM
2011
ACM
12 years 10 months ago
2011
ACM
The Generalized Second Price (GSP) auction is the primary method by which sponsered search advertisements are sold. We study the performance of this auction in the Bayesian settin...
SIGECOM
2010
ACM
14 years 7 days ago
2010
ACM
The existing literature on optimal auctions focuses on optimizing the expected revenue of the seller, and is appropriate for risk-neutral sellers. In this paper, we identify good ...