Lucas Lagarde

collaborators

2 papers

math.AG2025

On Modified Diagonal Cycles and the Beauville Decomposition of the Ceresa Cycle

Lucas Lagarde, Mohamed Moakher, Morena Porzio +2

Let $C$ be a curve of genus $g \geq 2$ , and let $J$ be its Jacobian. The choice of a degree 1 divisor $e$ on $C$ gives an embedding of $C$ into $J$ ; we denote by $[C]_{}^{e}\in \ma…

math.AG2025

Unramified Brauer groups of homogeneous spaces with finite stabilisers and the Grunwald Problem

Lucas Lagarde

We provide an algorithm for calculating the unramified Brauer group of a homogeneous space $X$ of a semi-simple simply connected group $H$ with finite geometric stabiliser over any…