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» Tight lower bounds for the online labeling problem
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ICDT
2009
ACM
148views Database» more  ICDT 2009»
14 years 8 months ago
Tight results for clustering and summarizing data streams
In this paper we investigate algorithms and lower bounds for summarization problems over a single pass data stream. In particular we focus on histogram construction and K-center c...
Sudipto Guha
DLT
2009
13 years 5 months ago
Tight Bounds on the Descriptional Complexity of Regular Expressions
Abstract. We improve on some recent results on lower bounds for conversion problems for regular expressions. In particular we consider the conversion of planar deterministic finite...
Hermann Gruber, Markus Holzer
FOCS
2005
IEEE
14 years 1 months ago
The Complexity of Online Memory Checking
We consider the problem of storing a large file on a remote and unreliable server. To verify that the file has not been corrupted, a user could store a small private (randomized...
Moni Naor, Guy N. Rothblum
ICALP
2009
Springer
14 years 7 months ago
Revisiting the Direct Sum Theorem and Space Lower Bounds in Random Order Streams
Estimating frequency moments and Lp distances are well studied problems in the adversarial data stream model and tight space bounds are known for these two problems. There has been...
Sudipto Guha, Zhiyi Huang
WDAG
2007
Springer
82views Algorithms» more  WDAG 2007»
14 years 1 months ago
The Space Complexity of Unbounded Timestamps
The timestamp problem captures a fundamental aspect of asynchronous distributed computing. It allows processes to label events throughout the system with timestamps that provide in...
Faith Ellen, Panagiota Fatourou, Eric Ruppert