2 papers
math.DG2026
Log-Euclidean Lie Groups
Olivier Bisson, Xavier Pennec
We develop a self-contained theory of log-Euclidean Lie groups: smooth manifolds diffeomorphic to finite-dimensional vector spaces, equipped with the pullback of a constant Euclide…
stat.AP2025
Log-Euclidean Frameworks for Smooth Brain Connectivity Trajectories
Olivier Bisson, Yanis Aeschlimann, Samuel Deslauriers-Gauthier +1
The brain is often studied from a network perspective, where functional activity is assessed using functional Magnetic Resonance Imaging (fMRI) to estimate connectivity between pre…