Some vector inequalities for two operators in Hilbert spaces with applications. (English) Zbl 06617613
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Properties of the radial part of the Laplace operator for $l=1$ in a special scalar product. (English. Russian original) Zbl 06604091
J. Math. Sci., New York 215, No. 5, 560-573 (2016); translation from Zap. Nauchn. Semin. POMI 434, 32-52 (2015).