74 search results - page 1 / 15 » Combination Can Be Hard: Approximability of the Unique Cover... |
SIAMCOMP
2008
13 years 7 months ago
2008
We prove semi-logarithmic inapproximability for a maximization problem called unique coverage: given a collection of sets, find a subcollection that maximizes the number of elemen...
CRYPTO
2009
Springer
14 years 1 months ago
2009
Springer
We prove the equivalence, up to a small polynomial approximation factor n/ log n, of the lattice problems uSVP (unique Shortest Vector Problem), BDD (Bounded Distance Decoding) and...
APPROX
2010
Springer
13 years 9 months ago
2010
Springer
In this paper, we consider the checkpoint problem in which given an undirected graph G, a set of sourcedestinations {(s1, t1), (s1, t1), . . . , (sk, tk)} and a set of fixed paths...
SODA
2010
ACM
14 years 4 months ago
2010
ACM
If a two-player social welfare maximization problem does not admit a PTAS, we prove that any maximal-in-range truthful mechanism that runs in polynomial time cannot achieve an app...
APPROX
2008
Springer
13 years 9 months ago
2008
Springer
Abstract. In this paper, we propose a general framework for designing fully polynomial time approximation schemes for combinatorial optimization problems, in which more than one ob...