The Logarithm Matrix in Terms of the Tree of 2-Adic Numbers

Quand : 8 juillet 2026 à 11:00

Où : IHES

Organisé par : Institut Henri Poincaré

Séminaire de géométrie arithmétique The logarithm matrix appears in the arithmetic of elliptic curves, and encodes the growth of arithmetic invariants in towers of number fields. Its definition is a bit involved. One goal of the talk is to present a simpler definition, in terms of 2-adic digits. We also present an answer to a question posed by Bruno Kahn on June 22, 2026, which makes the definitio