Abstract
Let θ be an inner function, let θ*(H 2)=H 2⊖θH 2, and let μ be a finite Borel measure on the unit circle\(\mathbb{T}\). Our main purpose is to prove that, if every functionf∈θ*(H 2) can be defined μ-almost everywhere on\(\mathbb{T}\) in a certain (weak) natural sense, then every functionf∈θ*(H 2) has finite angular boundary values μ-almost everywhere on\(\mathbb{T}\). A similar result is true for the Lp-analog of θ*(H 2) (p>0). Bibliography: 17 titles.
Similar content being viewed by others
Literature Cited
J. Garnett,Bounded Analytic Functions, Academic Press (1981).
N. K. Nikol'skii,Lectures on the Shift Operator [in Russian], Moscow (1980).
A. B. Aleksandrov, “Invariant subspaces of the shift operator. Axiomatic approach,”Zap. Nauchn. Semin. LOMI,113, 7–26 (1981).
A. B. Aleksandrov, “Invariant subspaces of the inverse shift operator on the spaceH p(p ∈ (0, 1)),”Zap. Nauchn. Semin. LOMI,92, 7–29 (1979).
A. L. Vol'berg and S. R. Treil', “Embedding theorems for invariant subspaces of the inverse shift operator,”Zap. Nauchn. Semin. LOMI,149, 38–51 (1986).
W. Cohn, “Radial limits and star invariant subspaces,”Am. J. Math.,108, 719–749 (1986).
P. R. Ahern and D. N. Clark, “Radial limits and invariant subspaces,”Am. J. Math.,92, 332–342 (1970).
D. Clark, “One dimensional perturbations of restricted shifts,”J. Anal. Math.,25, 169–191 (1972).
A. G. Poltoratskii, “Boundary behavior of pseudocontinuable functions,”Algebra Analiz,5, 189–210 (1993).
E. M. Nikishin. “Resonance theorems and expansions in eigenfunctions of the Laplace operator,”Izv. Akad. Nauk SSSR,36, 795–813 (1972).
B. Maurey, “Thèorèmes des factorization pour les opérateurs linéaires à valeurs dans les espacesL p,”Astérisque, No.11 (1974).
A. B. Aleksandrov, “On theA-integrability of boundary values for harmonic functions,”Mat. Zam.,30, 59–72 (1981).
M. G. Goluzina, “On multiplication and division for Cauchy type integrals,”Vestnik LGU, Ser. 1, No. 19, 8–15 (1981).
S. V. Khrushchev and S. A. Vinogradov, “Free interpolation in the space of uniformly convergent Taylor series,”Lect. Notes Math.,864, 171–213 (1981).
A. B. Aleksandrov, “Inner functions and the related spaces of pseudocontinuable functions,”Mat. Zam.,170, 7–33 (1989).
W. Rudin, Function Theory in the Unit Ball of ℂn, Springer-Verlag (1984).
E. Bishop, “A general Rudin-Carleson Theorem,”Proc. Am. Math. Soc.,13, 140–143 (1962).
Additional information
Translated fromZapiski Nauchnykh Seminarov POMI, Vol. 222, 1995, pp. 5–17.
Rights and permissions
About this article
Cite this article
Aleksandrov, A.B. On the existence of nontangential boundary values of pseudocontinuable functions. J Math Sci 87, 3781–3787 (1997). https://doi.org/10.1007/BF02355824
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02355824