The relationship between learnability of a 'base class' of functions on a set X and learnability of a class of statistical functions derived from the base class is considered.
The study examines Probably Approximately Correct (PAC) learning and online learning in terms of sample complexity and combinatorial dimensions of the base class.
Improved bounds on the sample complexity of learning for statistical classes are established by using techniques from model theory.
The focus is on classes derived from logical formulas, and the article discusses the relationship between learnability and properties of the formula.