TY  - JOUR
AU  - R. Z. Dautov
TI  - Theorems on direct and inverse approximation by algebraic polynomials and piecewise polynomials in the spaces $H^m(a, b)$ and $B^s_{2,q}(a, b)$
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 2024
SP  - 14
EP  - 34
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/IVM_2024_1_a1/
LA  - ru
ID  - IVM_2024_1_a1
ER  -