How is mathematical knowledge recorded and preserved across generations? Contrary to the idea that mathematics itself is somehow ‘permanent’, in this talk we will explore heritage-making in mathematics, that is the people, institutions, and material objects that can give mathematical ideas longevity. We will explore the heritage-making found in two very different types of French nineteenth-century libraries: those of famous mathematicians and those of secondary schools. We will especially focus on how the recording – and forgetting – of mathematical ideas is influenced by their publishing, political, and intellectual contexts.

This lecture was recorded by Professor Caroline Ehrhardt on 8th October 2025 at Barnard’s Inn Hall, London.

Caroline Ehrhardt is Professor of History of Science and Deputy Director of IDHE.S at Université Paris 8 professor in history of science at the Université Paris 8 (France). Her research concerns the history of mathematics in France and Europe (1789–1914). She has published on Evariste Galois, on Galois theory and on mathematics education.

Caroline is currently coordinating a collective project funded by the French Agence Nationale de la Recherche, entitled ‘Heritage and patrimonialisation of mathematics, 18th-20th centuries’. She also focuses on the practice of mathematics within French life insurance companies, on interactions between the mathematical and actuarial communities, and the production of mortality tables.

The transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/watch-now/heritage-maths

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