The theory of partial algebraic operations

Preface. Translator's Preface. 0. Basic Terminology. 1. Initial Concepts and Properties. 2. Homomorphisms. 3. Divisibility Relations. 4. Intermediate Associativity. 5. Semigroup Extensions of Partial Operations. 6. Partial Groupoids of Transformations. 7. Factorisation of Partial Groupoids. Bibliography. Index.