On estimates for orders of best $M$-term approximations of multivariate functions in anisotropic Lorentz-karamata spaces

Approximation by polynomials (41A10) Rate of convergence, degree of approximation (41A25) Trigonometric polynomials, inequalities, extremal problems (42A05)

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On estimates for orders of best \(M\)-term approximations of multivariate functions in anisotropic Lorentz-karamata spaces