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Demiclosedness Principles for Generalized Nonexpansive Mappings

Author

Listed:
  • Sedi Bartz

    (University of Massachusetts Lowell)

  • Rubén Campoy

    (University of Massachusetts Lowell)

  • Hung M. Phan

    (University of Massachusetts Lowell)

Abstract

Demiclosedness principles are powerful tools in the study of convergence of iterative methods. For instance, a multi-operator demiclosedness principle for firmly nonexpansive mappings is useful in obtaining simple and transparent arguments for the weak convergence of the shadow sequence generated by the Douglas–Rachford algorithm. We provide extensions of this principle, which are compatible with the framework of more general families of mappings such as cocoercive and conically averaged mappings. As an application, we derive the weak convergence of the shadow sequence generated by the adaptive Douglas–Rachford algorithm.

Suggested Citation

  • Sedi Bartz & Rubén Campoy & Hung M. Phan, 2020. "Demiclosedness Principles for Generalized Nonexpansive Mappings," Journal of Optimization Theory and Applications, Springer, vol. 186(3), pages 759-778, September.
  • Handle: RePEc:spr:joptap:v:186:y:2020:i:3:d:10.1007_s10957-020-01734-6
    DOI: 10.1007/s10957-020-01734-6
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    Cited by:

    1. Sedi Bartz & Rubén Campoy & Hung M. Phan, 2022. "An Adaptive Alternating Direction Method of Multipliers," Journal of Optimization Theory and Applications, Springer, vol. 195(3), pages 1019-1055, December.

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