TY - JOUR AU - H K Nigam AU - Manoj Kumar Sah TI - Characterizations of double Hausdorff matrices and best approximation of conjugate of a function in generalized Hölder space JO - Filomat PY - 2022 SP - 5003 VL - 36 IS - 15 UR - http://geodesic.mathdoc.fr/articles/10.2298/FIL2215003N/ DO - 10.2298/FIL2215003N LA - en ID - 10_2298_FIL2215003N ER -