EDITORS' FOREWORD
The Intrinsic Complexity of Language Identification
Inclusion Problems in Parallel Learning and Games
Oracles and Queries That Are Sufficient for Exact Learning
Fat-Shattering and the Learnability of Real-Valued Functions
Computing the Maximum Bichromatic Discrepancy, with Applications to Computer Graphics and Machine Learning
Learning from a Consistently Ignorant Teacher
EDITOR'S FOREWORD
Normal Forms and Conservative Extension Properties for Query Languages over Collection Types
An Extension of Van Gelder's Alternating Fixpoint to Magic Programs
Completeness Results for Recursive Data Bases
Reflective Programming in the Relational Algebra
Selectivity and Cost Estimation for Joins Based on Random Sampling
Towards Tractable Algebras for Bags
Indexing for Data Models with Constraints and Classes
Author Index for Volume 52