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Found 17 Documents (Results 1–17)

Kolmogorov-type inequalities for norms of Riesz derivatives of functions of several variables with Laplacian bounded in \(L_\infty\) and related problems. (English. Russian original) Zbl 1314.41006

Math. Notes 95, No. 1, 3-14 (2014); translation from Mat. Zametki 95, No. 1, 3-17 (2014).
MSC:  41A17
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On the exact values of the best approximations of classes of differentiable periodic functions by splines. (English. Russian original) Zbl 1290.41022

Math. Notes 87, No. 5, 623-635 (2010); translation from Mat. Zametki 87, No. 5, 669-683 (2010).
MSC:  41A55 41A15
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Sharp estimates of the norms of fractional derivatives of functions of several variables satisfying Hölder conditions. (English. Russian original) Zbl 1205.26008

Math. Notes 87, No. 1, 23-30 (2010); translation from Mat. Zametki 87, No. 1, 26-34 (2010).
MSC:  26A33 26D10
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Exact values of best approximations for classes of periodic functions by splines of deficiency 2. (English. Russian original) Zbl 1204.41018

Math. Notes 85, No. 4, 515-527 (2009); translation from Mat. Zametki 85, No. 4, 538-551 (2009).
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Additive inequalities for intermediate derivatives of differentiable mappings of Banach spaces. (English. Russian original) Zbl 0927.46025

Math. Notes 63, No. 3, 293-301 (1998); translation from Mat. Zametki 63, No. 3, 332-342 (1998).
MSC:  46G05 46G25 47H60
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