TY - JOUR AU - E. A. Rakhmanov TI - The Gonchar-Stahl $\rho^2$-theorem and associated directions in the theory of rational approximations of analytic functions JO - Sbornik. Mathematics PY - 2016 SP - 1236 EP - 1266 VL - 207 IS - 9 UR - http://geodesic.mathdoc.fr/item/SM_2016_207_9_a2/ LA - en ID - SM_2016_207_9_a2 ER -