Abstract
The philosophy and history of mathematical practices have brought the study of mathematical language and signs to the forefront of contemporary mathematical thought. However, despite the fruitfulness of this research trend, a comprehensive and unified account of its various aspects and the diverse approaches taken to explore it remains elusive. Recognizing this gap, we have undertaken the task of editing the present section of the Handbook of the History and Philosophy of Mathematical Practice as a much-needed remedy. Before providing an overview of the various contributions to the section, this introduction provides some context for the subject matter and a few conceptual clarifications.