TY - JOUR AU - V. Lebedev AU - A. Olevskii TI - C1 Changes of Variable: Beurling-Helson Type Theorem and Hörmander Conjecture on Fourier Multipliers. JO - Geometric and functional analysis PY - 1994 SP - 213 EP - 235 VL - 4 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/GFA_1994__4_6_58161/ ID - GFA_1994__4_6_58161 ER -