Sciweavers

1941 search results - page 33 / 389
» On the Hardness of Approximate Reasoning
Sort
View
ECCC
2006
88views more  ECCC 2006»
14 years 11 months ago
Hardness of Directed Routing with Congestion
Given a graph G and a collection of source-sink pairs in G, what is the least integer c such that each source can be connected by a path to its sink, with at most c paths going th...
Julia Chuzhoy, Sanjeev Khanna
JACM
2006
99views more  JACM 2006»
14 years 11 months ago
Finding a maximum likelihood tree is hard
Abstract. Maximum likelihood (ML) is an increasingly popular optimality criterion for selecting evolutionary trees [Felsenstein 1981]. Finding optimal ML trees appears to be a very...
Benny Chor, Tamir Tuller
IPPS
2000
IEEE
15 years 4 months ago
Are COTS Suitable for Building Distributed Fault-Tolerant Hard Real-Time Systems?
For economic reasons, a new trend in the development of distributed hard real-time systems is to rely on the use of CommercialO -The-Shelf cots hardware and operating systems. As...
Pascal Chevochot, Antoine Colin, David Decotigny, ...
FOCS
2008
IEEE
15 years 6 months ago
Beating the Random Ordering is Hard: Inapproximability of Maximum Acyclic Subgraph
We prove that approximating the Max Acyclic Subgraph problem within a factor better than 1/2 is Unique-Games hard. Specifically, for every constant ε > 0 the following holds:...
Venkatesan Guruswami, Rajsekar Manokaran, Prasad R...
RTCSA
1999
IEEE
15 years 4 months ago
Hard Real-Time Garbage-Collection in the Jamaica Virtual Machine
Java's automatic memory management is the main reason that prevents Java from being used in hard realtime environments. We present the garbage collection mechanism that is us...
Fridtjof Siebert