%0 Journal Article %A Crowley, Diarmuid %A Schick, Thomas %A Steimle, Wolfgang %T The derivative map for diffeomorphism of disks: an example %J Geometry & topology %D 2023 %P 3699-3713 %V 27 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.2140/gt.2023.27.3699/ %R 10.2140/gt.2023.27.3699 %F GT_2023_27_9_a4