机译:Approximation by quasi-interpolation operators and Smolyak's algorithm
Univ Lubeck, Inst Math, Ratzeburger Allee 160, D-23562 Lubeck, Germany|NAS Ukraine, Inst Appl Math & Mech, Gen Batyuk Str 19, UA-84116 Slovyansk, Donetsk Region, Ukraine;
Smolyak algorithm; Quasi-interpolation operators; Kantorovich operators; Besov-Triebel-Lizorkin spaces of mixed; smoothness; Error estimates; Littlewood-Paley-type characterizations;