TY - JOUR AU - L. Singhal TI - Diophantine exponents for standard linear actions of ${\rm SL}_2$ over discrete rings in $\mathbb {C}$ JO - Acta Arithmetica PY - 2017 SP - 53 EP - 73 VL - 177 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa8370-6-2016/ DO - 10.4064/aa8370-6-2016 LA - en ID - 10_4064_aa8370_6_2016 ER -