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Abstract

Finite convolution operators are studied by means of a complex Fourier transform technique. Questions concerning unicellularity and similarity are related to asymptotic properties of bounded analytic functions in a half-plane. The purpose of the paper is to survey recent work, and to call attention to open problems. The theory is illustrated by a list of examples.

Research supported by NSF Grants MCS 76–06297 and MCS 75–04594.

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References

  1. M.S. Brodskiǐ, On a problem of I.M. Ge’fand. Uspehi Mat. Nauk 12 (1957), no. 2 (74), 129–132. (Russian) MR 20 #1229.

    Google Scholar 

  2. M.S. Brodskiǐ, On the unicellularity of the integration operator and a theorem of Titchmarsh. Uspehi Mat. Nauk 20 (1965), no. 5 (125), 189–192. (Russian) MR 32 #8055.

    Google Scholar 

  3. M.S. Brodskiǐ, Triangular and Jordan Representations of Linear Operators. Moscow, 1969. Transi. Math., Monographs, Vol. 32, Amer. Math. Soc., Providence, R.I., 1970.

    Google Scholar 

  4. V.W. Daniel, Invariant subspaces of convolution operators. Dissertation, University of Virginia, 1970.

    Google Scholar 

  5. W.F. Donoghue, Jr., The lattice of invariant subspaces of a completely continuous quasi-nilpotent transformation. Pacific J. Math. 7 (1957), 1031–1036. MR 19# 1066.

    Google Scholar 

  6. C. Foiaş and W. Mlak, The extended spectrum of completely non-unitary contractions and the spectral mapping theorem. Studia Math. 26 (1966), 239–245. MR 34 #610.

    Google Scholar 

  7. C. Foiaş and J.F. Williams, Some remarks on the Volterra operator. Proc. Amer. Math. Soc. 31 (1972), 177–184. MR 45 #4194.

    Google Scholar 

  8. R. Frankfurt, Spectral analysis of finite convolution operators. Trans. Amer. Math. Soc. 214 (1975), 279–301.

    Article  Google Scholar 

  9. R. Frankfurt, On the unicellularity of finite convolution operators. Indiana Univ. Math. J. 26 (1977), 223–232.

    Article  Google Scholar 

  10. R. Frankfurt and J. Rovnyak, Finite convolution operators. J. Math. Anal. Appl. 49 (1975), 347–374. MR 51 #3947.

    Article  Google Scholar 

  11. J.M. Freeman, Volterra operators similar to J: \( f\left( x \right) \to \int\limits_0^x {f\left( y \right)} \;dy \). Trans. Amer. Math. Soc. 116 (1965), 181–192. MR 33 #592.

    Google Scholar 

  12. P.A. Fuhrman, On the corona theorem and its application to spectral problems in Hilbert space. Trans. Amer. Math. Soc. 132 (1968), 55–56. MR 36 #5751.

    Article  Google Scholar 

  13. P.A. Fuhrman, A functional calculus in Hilbert space based on operator valued analytic functions. Israel J. Math. 6 (1968), 267–278. MR 38 #5029.

    Article  Google Scholar 

  14. J.I. Ginsberg and D.J. Newman, Generators of certain radical algebras. J. Approximation Theory 3 (1970), 229–235. MR 41# 9014.

    Article  Google Scholar 

  15. I.C. Gohberg and M.G. Kreǐn, Theory and Applications of Volterra Operators in Hilbert Space. Moscow, 1967. Transi. Math. Monographs, Vol. 24, Amer. Math. Soc, Providence, R.I., 1970. MR 36 #2007.

    Google Scholar 

  16. E. Hille and R.S. Phillips, Functional Analysis and Semi-Groups. Amer. Math. Soc. Coll. Publ., Vol XXXI, Providence, 1957.

    Google Scholar 

  17. G.K. Kalisch, On similarity, reducing manifolds, and unitary equivalence of certain Volterra operators. Ann. of Math. 66 (1957), 481–494. MR 19 # 970.

    Article  Google Scholar 

  18. G.K. Kalisch, On similarity invariants of certain operators in Lp. Pacific J. Math. 11 (1961), 247–252. MR 22# 11261.

    Google Scholar 

  19. G.K. Kalisch, A functional analytic proof of Titchmarsh’s convolution theorem. J. Math. Anal. Appl. 5 (1962), 176–183. MR 25 #43U7.

    Article  Google Scholar 

  20. G.K. Kalisch, Théorème de Titchmarsh sur la convolution et opérateurs de Volterra. Séminaire d’Analyse, dirigé par P. Lelong, 1962/63, no. 5, 6 pp. Secretariat mathematique, Paris, 1963. MR 31 #6123.

    Google Scholar 

  21. G.K. Kalisch, On fractional integrals of pure imaginary order in Lp. Proc. Amer. Math. Soc. 18 (1967), 136–139. MR 35 #7145.

    Google Scholar 

  22. I.I. Kal’muševskiǐ, On the linear equivalence of Volterra operators. Uspehi Mat. Nauk 20 (1965), no. 6 (126), 93–97. MR 32 #8161; errata, MR 46, p. 2168.

    Google Scholar 

  23. I.I. Kal’muševskiǐ, On a certain class of mutually non-equivalent Volterra operators. (Russian) Ukrain. Mat. Ž. 18 (1966), no. 3, 116–119. MR 33 #1678.

    Article  Google Scholar 

  24. G.E. Kisilevskiǐ, Invariant subspaces of dissipative Volterra operators with nuclear imaginary components. Izv. Akad. Nauk SSSR Ser. Mat. 32 (1968), 3–23. Math. USSR-Izv. 2 (1968), 1–20. MR 36 #4375.

    Google Scholar 

  25. H. Kober, On a theorem of Schur and on fractional integrals of purely imaginary order. Trans. Amer. Math. Soc. 50 (1941), 160–174. MR 3, 39.

    Google Scholar 

  26. M.M. Malamud, Sufficient conditions for the linear equivalence of Volterra operators.Teor. Funkciǐ Funkcional. Anal. i Prilozen. Vyp. 23 (1975), 59–69, 170 (Russian). MR 53 #3799.

    Google Scholar 

  27. M.M. Malamud and E.R. Cekanovskiǐ, Tests for the linear equivalence of Volterra operators in the L p scale. Uspehi Mat. Nauk 30 (1975), no. 5 (185), 217–218 (Russian). MR 33# 3800.

    Article  Google Scholar 

  28. P.S. Muhly, Compact operators in the commutant of a contraction. J. Functional Analysis 8 (1971), 197–224. MR 47 # 4035.

    Article  Google Scholar 

  29. H. Radjavi and P. Rosenthal, Invariant Subspaces. Springer-Verlag, New York, 1973.

    Google Scholar 

  30. L.A. Sahnovič, Spectral analysis of Volterra operators and inverse problems. Dokl. Akad. Nauk SSSR 115, no. 4 (1957), 666–669. (Russian) MR 19 # 866.

    Google Scholar 

  31. L.A. Sahnovič, On reduction of Volterra operators to the simplest form and on inverse problems. Izv. Akad. Nauk SSSR Ser. Mat. 21 (1957), 235–262. MR 19 # 970.

    Google Scholar 

  32. L.A. Sahnovič, Reduction of a non-selfadjoint operator with continuous spectrum to diagonal form. Uspehi Mat. Nauk 13 (1958), no. 4 (42), 193–196. (Russian) MR 20 # 7222.

    Google Scholar 

  33. L.A. Sahnovič, Spectral analysis of operators of the form \( Kf= \int\limits_0^x {f\left( t \right)k\left( {x - t} \right)} \;dt \). Izv. Akad. Nauk SSSR 22 (1958), 299–308. MR 20# 5409.

    Google Scholar 

  34. L.A. Sahnovič, Spectral analysis of Volterra operators prescribed in the vector-function space L m2 (0,l), Ukrain. Mat. Ž. 16 (1964), 259–268.

    Google Scholar 

  35. L.A. Sahnovič, Spectral analysis of Volterra operators prescribed in the vector-function space L m2 (0,l), Amer. Math. Soc. Transi. (2) 61 (1967), 85–95. MR 29 # 2680.

    Google Scholar 

  36. L.A. Sahnovič, Dissipative Volterra operators. Mat. Sb. 76 (118) (1968), 323–343. Math. USSR Sb. 5 (1968), 311–331. MR 37 # 3389.

    Google Scholar 

  37. D. Sarason, A remark on the Volterra operator. J. Math. Anal. Appl. 12 (1965), 244–246. MR 33 # 580.

    Article  Google Scholar 

  38. D. Sarason, Weak-star generators of H. Pacific J. Math. 17 (1966), 519–528. MR 35# 2151.

    Google Scholar 

  39. D. Sarason, Generalized interpolation in H. Trans. Amer. Math. Soc. 127 (1967), 179–203. MR 34 # 8193.

    Google Scholar 

  40. B. Sz.-Nagy and C. Foiaş, Harmonic Analysis of Operators on Hilbert Space. North Holland, New York, 1970.

    Google Scholar 

  41. V. Volterra, Theory of Functionals. Dover, New York, 1959.

    Google Scholar 

  42. V. Volterra and J. Pérès, Leçons sur la Composition et les Fonctions Permutables. Gauthier-Villars, Paris, 1924.

    Google Scholar 

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Frankfurt, R., Rovnyak, J. (1978). Recent Results and Unsolved Problems on Finite Convolution Operators. In: Butzer, P.L., Szökefalvi-Nagy, B. (eds) Linear Spaces and Approximation / Lineare Räume und Approximation. International Series of Numerical Mathematics / Intermationale Schriftenreihe zur Numberischen Mathematik / Sùrie Internationale D’analyse Numùruque, vol 40. Birkhäuser Basel. https://doi.org/10.1007/978-3-0348-7180-8_13

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  • DOI: https://doi.org/10.1007/978-3-0348-7180-8_13

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