Approximation in weighted Smirnov-Orlicz classes

Approximation of functions by de la Vallée-Poussin sums in weighted Orlicz spaces

“…The problems of approximation theory in weighted and nonweighted Lebesgue spaces, weighted and nonweighted Orlicz spaces have been investigated by several authors (see, e.g., [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][30][31][32]36,37,45,46]). …”

Approximation of periodic functions in weighted Orlicz spaces

“…Approximation by trigonometric polynomials and other related problems in the Orlicz and weighted Orlicz spaces were studied in [2,[8][9][10][11][12]17,18,21,23,24].…”

Approximation by rational functions in Smirnov classes with variable exponent

“…For example, the problems of approximation theory for Smirnov classes with variable exponent, weighted Smirnov classes, weighted Smirnov Orlicz classes and weighted rearrangement invariant Smirnov classes were studied in [4][5][6][7][8]. But the approximation problems in the doubly connected domains were not investigated sufficiently wide.…”