The Banach algebra \({\mathfrak B}\) generated by multiplication operators, Wiener-Hopf operators and Mellin convolution operators with piecewise slowly oscillating and continuous data are studied on weighted Lebesgue spaces. The compactness of commutators of operators in the algebra \({\mathfrak B}\) is established. Using the limit operators techniques, describing the maximal ideal space of a central subalgebra of the quotient Banach algebra \({\mathfrak B}^\pi \) with respect to the ideal of compact operators, and studying the local algebras associated with the Allan-Douglas local principle, we establish homomorphic images for considered local algebras and derive necessary Fredholm conditions for the operators \(A\in {\mathfrak B}\) in terms of the invertibility of such images.

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Algebras of Integral Operators with Piecewise Slowly Oscillating Data: Compactness of Commutators, Necessary Fredholm Conditions

  • M. Amélia Bastos,
  • Yuri I. Karlovich,
  • Helena Mascarenhas

摘要

The Banach algebra \({\mathfrak B}\) generated by multiplication operators, Wiener-Hopf operators and Mellin convolution operators with piecewise slowly oscillating and continuous data are studied on weighted Lebesgue spaces. The compactness of commutators of operators in the algebra \({\mathfrak B}\) is established. Using the limit operators techniques, describing the maximal ideal space of a central subalgebra of the quotient Banach algebra \({\mathfrak B}^\pi \) with respect to the ideal of compact operators, and studying the local algebras associated with the Allan-Douglas local principle, we establish homomorphic images for considered local algebras and derive necessary Fredholm conditions for the operators \(A\in {\mathfrak B}\) in terms of the invertibility of such images.