TY - JOUR AU - V. V. Ryndina TI - On the equivalence between an $n$th order differential operator with a regular singular point and an Euler operator in the space $A_R$ JO - Differencialʹnye uravneniâ PY - 1979 SP - 636 EP - 649 VL - 15 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1979_15_4_a7/ LA - ru ID - DE_1979_15_4_a7 ER -