12. CoCo 1997: Ulm, Germany

Session 1

• Harry Buhrman, Lance Fortnow, Leen Torenvliet:
  Six Hypotheses in Search of a Theorem. 2-12
  
• Daniel Hammer, Andrei E. Romashchenko, Alexander Shen, Nikolai K. Vereshchagin:
  Inequalities for Shannon entropies and Kolmogorov complexities. 13-23
  
• Richard Beigel, Bin Fu:
  Circuits Over PP and PL. 24-35
  
• Bernd Borchert, Riccardo Silvestri:
  The General Notion of a Dot-Operator. 36-44
  
• Klaus-Jörn Lange, Pierre McKenzie, Alain Tapp:
  Reversible Space Equals Deterministic Space. 45-50
  

Session 2

• Lance Fortnow:
  Nondeterministic Polynomial Time versus Nondeterministic Logarithmic Space: Time-Space Tradeoffs for Satisfiability. 52-60
  
• Kenneth W. Regan:
  Polynomial Vicinity Circuits and Nonlinear Lower Bounds. 61-68
  
• Rainer Schuler:
  A Note on Universal Distributions for Polynomial-Time Computable Distributions. 69-73
  
• Christoph Karg:
  LR(k) Testing is Average Case Complete. 74-80
  

Session 3

• Evgeny Dantsin, Thomas Eiter, Georg Gottlob, Andrei Voronkov:
  Complexity and Expressive Power of Logic Programming. 82-101
  
• Stephen A. Fenner, Steven Homer, Randall Pruim, Marcus Schaefer:
  Hyper-Polynomial Hierarchies and the NP-Jump. 102-110
  
• Jack H. Lutz, Yong Zhao:
  The Density of Weakly Complete Problems under Adaptive Reductions. 111-120
  
• Klaus Ambos-Spies, Levke Bentzien:
  Separating NP-Completeness Notions under Strong Hypotheses. 121-127
  
• Rodney G. Downey, André Nies:
  Undecidability Results for Low Complexity Degree Structures. 128-132
  

Session 4

• Manindra Agrawal, Eric Allender, Samir Datta:
  On TC⁰, AC⁰, and Arithmetic Circuits. 134-148
  
• Richard Beigel, Alexis Maciel:
  Upper and Lower Bounds for Some Depth-3 Circuit Classes. 149-157
  
• Liming Cai, Jianer Chen, Johan Håstad:
  Circuit Bottom Fan-in and Computational Power. 158-164
  
• Christer Berg, Staffan Ulfberg:
  A Lower Bound for Perceptrons and an Oracle Separation of the PP^PH Hierarchy. 165-172
  

Session 5

• Heribert Vollmer, Klaus W. Wagner:
  On Operators of Higher Types. 174-184
  
• Maren Hinrichs, Gerd Wechsung:
  Time Bounded Frequency Computations. 185-192
  
• Joshua Berman, Arthur Drisko, François Lemieux, Cristopher Moore, Denis Thérien:
  Circuits and Expressions with NOn-Associative Gates. 193-203
  
• Vikraman Arvind, Jacobo Torán:
  A Nonadaptive NC Checker for Permutation Group Intersection. 204-212
  
• Ulrich Hertrampf:
  Acceptance by Transformation Monoids (with an Application to Local Self Reductions). 213-224
  

Session 6

• Allan Borodin, Ran El-Yaniv:
  On Ranomization in Online Computation. 226-238
  
• László Babai, Peter G. Kimmel:
  Randomized Simultaneous Messages: Solution of a Problem of Yao in Communication Complexity. 239-246
  
• Gábor Tardos, Uri Zwick:
  The Communication Complexity of the Universal Relation. 247-259
  

Session 7

• Pierluigi Crescenzi:
  A Short Guide to Approximation Preserving Reductions. 262-273
  
• Jianer Chen, Donald K. Friesen, Hao Zheng:
  Tight Bound on Johnson's Algoritihm for Max-SAT. 274-281
  
• Sanjeev Khanna, Madhu Sudan, Luca Trevisan:
  Constraint Satisfaction: The Approximability of Minimization Problems. 282-296
  
• Janos Simon, Shi-Chun Tsai:
  A Note on the Bottleneck Counting Argument. 297-301
  
• Stasys Jukna:
  Finite Limits and Monotone Computations: The Lower Bounds Criterion. 302-313
  

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