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DCG
2011
14 years 10 months ago
Random Geometric Complexes
We study the expected topological properties of ˇCech and Vietoris-Rips complexes built on random points in Rd . We find higher dimensional analogues of known results for connect...
Matthew Kahle
COMPGEOM
2009
ACM
15 years 10 months ago
Minimum cuts and shortest homologous cycles
We describe the first algorithms to compute minimum cuts in surface-embedded graphs in near-linear time. Given an undirected graph embedded on an orientable surface of genus g, w...
Erin W. Chambers, Jeff Erickson, Amir Nayyeri
KDD
2009
ACM
146views Data Mining» more  KDD 2009»
15 years 10 months ago
Online allocation of display advertisements subject to advanced sales contracts
In this paper we propose a utility model that accounts for both sales and branding advertisers. We first study the computational complexity of optimization problems related to bo...
Saeed Alaei, Esteban Arcaute, Samir Khuller, Wenji...
ICC
2007
IEEE
121views Communications» more  ICC 2007»
15 years 10 months ago
On the Expected Complexity Analysis of a Generalized Sphere Decoding Algorithm for Underdetermined Linear Communication Systems
This paper presents an analytical approach to evaluate the expected complexity of a generalized sphere decoding (GSD) algorithm, GSDλ − , for underdetermined integer leastsquare...
Ping Wang, Tho Le-Ngoc
FSTTCS
2003
Springer
15 years 9 months ago
Moderately Hard Functions: From Complexity to Spam Fighting
A key idea in cryptography is using hard functions in order to obtain secure schemes. The theory of hard functions (e.g. one-way functions) has been a great success story, and the ...
Moni Naor