%0 Journal Article %A Debapriya Biswas %A Sandipan Dutta %T Geometric Invariants Under the Möbius Action of the Group $SL(2;\mathbb R)$ %J Kragujevac Journal of Mathematics %D 2021 %P 925 %V 45 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2021_45_6_a6/ %G en %F KJM_2021_45_6_a6