Acknowledgements.- Preface.- General overview of the book.- overview of the first chapter.- Chapter I. Theoretical Background and Starting Point. Overview of the Second Chapter.- Chapter II. The Theoretical Research Question.- Overview of the Third Chapter.- Chapter III. Epistemology-Oriented Analyses of Mathematical Interactions. Overview of the Fourth Chapter.- Chapter IV. Epistemological and Communicational Conditions of Interactive Mathematical Knowledge Constructions. Looking Back.- References.- Subject Index.- Index of Names.