
Le 16 juin 2025, La Poste a rendu hommage à Alexander Grothendieck en émettant un timbre postal.
Le professeur Caramello, président de l’Institut, a eu l’honneur de contribuer à la création de ce timbre. Elle a notamment participé au choix de la formule mathématique qui figure sur le timbre.
Celle-ci représente l’un des principes fondamentaux des travaux de Grothendieck, la méthode de la relativité (qui consiste à remplacer l’étude des objets par celle des morphismes entre eux), qu’il a introduite dans ses nouveaux fondements de la géométrie algébrique.
Grothendieck avait pour habitude de commencer ses séminaires en écrivant cette expression au tableau.
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