Sciweavers

MST
2010
83views more  MST 2010»
13 years 11 months ago
Does the Polynomial Hierarchy Collapse if Onto Functions are Invertible?
The class TFNP, defined by Megiddo and Papadimitriou, consists of multivalued functions with values that are polynomially verifiable and guaranteed to exist. Do we have evidence ...
Harry Buhrman, Lance Fortnow, Michal Koucký...
SIAMCOMP
1998
118views more  SIAMCOMP 1998»
14 years 2 days ago
Genericity, Randomness, and Polynomial-Time Approximations
Polynomial-time safe and unsafe approximations for intractable sets were introduced by Meyer and Paterson [Technical Report TM-126, Laboratory for Computer Science, MIT, Cambridge,...
Yongge Wang
IPCO
1998
87views Optimization» more  IPCO 1998»
14 years 1 months ago
Simple Generalized Maximum Flow Algorithms
We introduce a gain-scaling technique for the generalized maximum ow problem. Using this technique, we present three simple and intuitive polynomial-time combinatorialalgorithms fo...
Éva Tardos, Kevin D. Wayne
APPROX
2010
Springer
207views Algorithms» more  APPROX 2010»
14 years 2 months ago
Exploiting Concavity in Bimatrix Games: New Polynomially Tractable Subclasses
Abstract. We study the fundamental problem of computing an arbitrary Nash equilibrium in bimatrix games. We start by proposing a novel characterization of the set of Nash equilibri...
Spyros C. Kontogiannis, Paul G. Spirakis
COCO
1994
Springer
90views Algorithms» more  COCO 1994»
14 years 4 months ago
On the Structure of Complete Sets
We show the following results regarding complete sets.
Harry Buhrman, Leen Torenvliet
PLDI
2010
ACM
14 years 5 months ago
Resolving and exploiting the k-CFA paradox: illuminating functional vs. object-oriented program analysis
Low-level program analysis is a fundamental problem, taking the shape of “flow analysis” in functional languages and “points-to” analysis in imperative and object-oriente...
Matthew Might, Yannis Smaragdakis, David Van Horn
TCC
2005
Springer
102views Cryptology» more  TCC 2005»
14 years 6 months ago
Handling Expected Polynomial-Time Strategies in Simulation-Based Security Proofs
The standard class of adversaries considered in cryptography is that of strict polynomial-time probabilistic machines. However, expected polynomial-time machines are often also co...
Jonathan Katz, Yehuda Lindell
CSR
2007
Springer
14 years 6 months ago
Inverting Onto Functions and Polynomial Hierarchy
The class TFNP, defined by Megiddo and Papadimitriou, consists of multivalued functions with values that are polynomially verifiable and guaranteed to exist. Do we have evidence ...
Harry Buhrman, Lance Fortnow, Michal Koucký...