6. CoCo 1991: Chicago, Illinois, USA

Proceedings of the Sixth Annual Structure in Complexity Theory Conference, June 30 - July 3, 1991, Chicago, Illinois, USA. IEEE Computer Society Press, 1991, ISBN 0-8186-2055-5

Session 1

Seinosuke Toda, Mitsunori Ogiwara: Counting Classes Are at Least as Hard as the Polynomial-Time Hierarchy. 2-12
Lance Fortnow, Nick Reingold: PP is Closed Under Truth-Table Reductions. 13-15
Mitsunori Ogiwara, Lane A. Hemachandra: A Complexity Theory for Feasible Closure Properties. 16-29
Stephen A. Fenner, Lance Fortnow, Stuart A. Kurtz: Gap-Definable Counting Classes. 30-42
Sanjay Gupta: The Power of Witness Reduction. 43-59

Session 2

William I. Gasarch: Bounded Queries in Recursion Theory: A Survey. 62-78
Steven Homer, Luc Longpré: On Reductions of NP Sets to Sparse Sets. 79-88
Ricard Gavaldà, Osamu Watanabe: On the Computational Complexity of Small Descriptions. 89-101
Daniel P. Bovet, Pierluigi Crescenzi, Riccardo Silvestri: Complexity Classes and Sparse Oracles. 102-108

Session 3

Jin-yi Cai, Anne Condon, Richard J. Lipton: PSPACE Is Provable By Two Provers In One Round. 110-115
Uriel Feige: On the Success Probability of the Two Provers in One-Round Proof Systems. 116-123
Joan Feigenbaum, Lance Fortnow: On the Random-Self-Reducibility of Complete Sets. 124-132
Rafail Ostrovsky: One-Way Functions, Hard on Average Problems, and Statistical Zero-Knowledge Proofs. 133-138
Mitsunori Ogiwara, Antoni Lozano: On One Query Self-Reducible Sets. 139-151

Session 4

Ming Li, Paul M. B. Vitányi: Combinatorics and Kolmogorov Complexity. 154-163
Peter Bro Miltersen: The Complexity of Malign Ensembles. 164-171
Rafi Heiman, Avi Wigderson: Randomized vs.Deterministic Decision Tree Complexity for Read-Once Boolean Functions. 172-179
Miklos Santha: On the Monte Carlo Boolean Decision Tree Complexity of Read-Once Formulae. 180-187

Session 5

Jack H. Lutz: A Pseudorandom Oracle Characterization of BPP. 190-195
Stephen A. Fenner: Notions of Resource-Bounded Category and Genericity. 196-212
László Babai, Noam Nisan: BPP has Subexponential Time Simulation unless EXPTIME has Pubishable Proofs. 213-219
Eric Allender, Lane A. Hemachandra, Mitsunori Ogiwara, Osamu Watanabe: Relating Equivalence and Reducibility to Sparse Sets. 220-229
Shouwen Tang, Bin Fu, Tian Liu: Exponential Time and Subexponential Time Sets. 230-237

Session 6

José L. Balcázar: Adaptive Logspace and Depth-Bounded Reducibilities. 240-254
Richard Chang, Jim Kadin, Pankaj Rohatgi: Connections between the Complexity of Unique Satisfiability and the Threshold Behavior of Randomized Reductions. 255-269
V. Vinay: Counting Auxiliary Pushdown Automata. 270-284
Jun Tarui: Degree Compexity of Boolean Functions and Its Applications to Realivized Separations. 382-390
Richard Beigel, Nick Reingold, Daniel A. Spielman: The Perceptron Strikes Back. 286-291

Session 7

Michelangelo Grigni, Michael Sipser: Monotone Separation of Logspace from NC. 294-298
Mauricio Karchmer, Ran Raz, Avi Wigderson: Super-logarithmic Depth Lower Bounds via Direct Sum in Communication Coplexity. 299-304
David A. Mix Barrington, Howard Straubing: Superlinear Lower Bounds for Bounded-Width Branching Programs. 305-313
Matthias Krause: Geometric Arguments Yield Better Bounds for Threshold Circuits and Distributed Computing. 314-321
Jeff Edmonds: Lower Bounds with Smaller Domain Size On Concurrent Write Parallel Machines. 322-331

Session 8

Neil Immerman: DSPACE[n^k] = VAR[k+1]. 334-340
Erich Grädel: Capturing Complexity Classes by Fragments of Second Order Logic. 341-352
Phokion G. Kolaitis, Madhukar N. Thakur: Approximation Properties of NP Minimization Classes. 353-366
Stephen Bellantoni, Toniann Pitassi, Alasdair Urquhart: Approximation and Small Depth Frege Proofs. 367-390

Errata

Jack H. Lutz, William J. Schmidt: Errata for Circuit Size to Pseudorandom Oracles. 392

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