References
-
Abdullayev F.G., Savchuk V.V., Shidlich A.L., Ozkartepe P.
Exact constants in direct and inverse approximation theorems of functions of several variables in the spaces $S^p$.
Filomat 2019, 33 (5), 1471-1484.
-
Bergh J., Löfström J.
Interpolation Spaces.
Springer-Verlag, Berlin-Heidelberg-New York, 1976.
-
Chandler-Wilde S., Hewett D., Moiola A.
Interpolation of Hilbert and Sobolev Spaces: Quantitative Estimates and Counterexamples.
Mathematika 2015, 61 (2), 414-443.
doi: 10.1112/S0025579314000278
-
Dmytryshyn M.
The spaces of exponential type vectors of complex degrees of positive operators.
Carpathian Math. Publ. 2010, 2 (2), 21-30.
-
Dmytryshyn M.
Approximation by exponential type vectors of positive operators.
Int. J. Pure and Appl. Math. 2017, 112 (4), 795-804.
doi: 10.12732/ijpam.v112i4.10
-
Dmytryshyn M., Lopushansky O.
On Spectral Approximations of Unbounded Operators.
Complex Anal. Oper. Theory 2019, 13 (8), 3659-3673.
doi: 10.1007/s11785-019-00923-0
-
Giulini S.
Approximation and Besov spaces on stratified groups.
Proc. Amer. Math. Soc. 1986, 96 (4), 569-578.
doi: 10.1090/S0002-9939-1986-0826483-3
-
Gorbachuk M., Gorbachuk V.
Approximation of smooth vectors of a closed operator by entire vectors of exponential type.
Ukrainian Math. J. 1995, 47 (5), 713-726.
doi: 10.1007/BF01059045
-
Gorbachuk M.L., Hrushka Ya.I., Torba S.M.
Direct and Inverse Theorems in the Theory of Approximation by the Ritz Method.
Ukrainian Math. J. 2005, 57 (5), 751-764.
doi: 10.1007/s11253-005-0225-4
-
McLean W.
Strongly Elliptic Systems and Boundary Integral Equations.
Cambridge Univ. Press, Cambridge, 2000.
-
Nelson E.
Analytic vectors.
Ann. of Math. 1959, 70 (3), 572-615.
doi: 10.2307/1970331
-
Peetre J., Sparr G.
Interpolation of normed abelian groups.
Ann. Mat. Pura ed Appl. 1972, 92 (1), 217-262.
doi: 10.1007/BF02417949
-
Triebel H.
Interpolation theory. Function spaces. Differential operators.
North-Holland Publishing Company, Amsterdam-New York-Oxford, 1978.
-
Vinogradov O.L.
Sharp Jackson-type inequalities for approximations of classes of convolutions by entire functions of exponential type.
St. Petersburg Math. J. 2006, 17 (4), 593-633.
doi: 10.1090/S1061-0022-06-00922-8