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Found 4,719 Documents (Results 1–100)

Direct and inverse theorems of the approximation of functions by algebraic polynomials and splines in the norms of the Sobolev space. (English. Russian original) Zbl 07644828

Russ. Math. 66, No. 6, 65-72 (2022); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2022, No. 6, 79-86 (2022).
MSC:  41Axx 65Nxx 35Jxx
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Boundedness and compactness of the two-dimensional rectangular Hardy operator. (English. Russian original) Zbl 07637733

Dokl. Math. 106, No. 2, 361-365 (2022); translation from Dokl. Ross. Akad. Nauk, Mat. Inform. Protsessy Upr. 506, 68-72 (2022).
MSC:  47G10 47B92 46E30
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Invariant subspaces of the generalized backward shift operator and rational functions. (English. Russian original) Zbl 07618891

St. Petersbg. Math. J. 33, No. 6, 927-942 (2022); translation from Algebra Anal. 33, No. 6, 49-70 (2021).
MSC:  47A15 46E10 47B37
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A chip-firing and a Riemann-Roch theorem on an ultrametric space. (English) Zbl 07605702

Chen, Zhen-Qing (ed.) et al., Dirichlet forms and related topics, in honor of Masatoshi Fukushima’s beiju, IWDFRT 2022, Osaka, Japan, August 22–26,2022. Singapore: Springer. Springer Proc. Math. Stat. 394, 23-43 (2022).
MSC:  31C25 05C05 05C38
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