In this volume, logic starts from the observation that in everyday arguments, as brought forward by say a lawyer, statements are transformed linguistically, connecting them in formal ways irrespective of their contents. Understanding such arguments as deductive situations, or "sequents" in the technical terminology, the transformations between them can be expressed as logical rules. The book concludes with the algorithms producing the results of Gentzen's midsequent theorem and Herbrand's theorem for prenex formulas.
Table of Contents
1. Sequent Calculi for Positive Logic 2. Cuts 3. Continuous Cut Elimination 4. Sequent Calculis for Minimal and Intuitionistic Logic 5. Classes of Algebras Associated to a Calculus 6. Calculii of Formulas 7. Sequent Calculii for Quantifier Logic 8. Semantical Consequence Operations and Modus Ponens Calculi 9. Selected Topics in Sequential Quantifier Logic