Ebook: Clones in universal algebra

The investigation of clones originates partly in logic, namely in the study of composition of truth functions, and partly in universal algebra, from the observation that most properties of algebras depend on their term operations rather than on the choice of their basic operations. During the last fifteen years or so the combination of these two aspects and the application of new algebraic methods produced a rapid development, and by now the theory of clones has become an integral part of universal algebra.