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Transactions of the American Mathematical Society

Published by the American Mathematical Society since 1900, Transactions of the American Mathematical Society is devoted to longer research articles in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

The 2020 MCQ for Transactions of the American Mathematical Society is 1.48 .

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The kernel average for two convex functions and its application to the extension and representation of monotone operators
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by Heinz H. Bauschke and Xianfu Wang PDF
Trans. Amer. Math. Soc. 361 (2009), 5947-5965 Request permission

Abstract:

We provide and analyze an average for two convex functions, based on a kernel function. It covers several known averages such as the arithmetic average, epigraphical average, and the proximal average. When applied to the Fitzpatrick function and the conjugate of Fitzpatrick function associated with a monotone operator, our average produces an autoconjugate (also known as selfdual Lagrangian) which can be used for finding an explicit maximal monotone extension of the given monotone operator. This completely settles one of the open problems posed by Fitzpatrick in the setting of reflexive Banach spaces.
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Additional Information
  • Heinz H. Bauschke
  • Affiliation: Department of Mathematics, Irving K. Barber School, UBC Okanagan, Kelowna, British Columbia, Canada V1V 1V7
  • MR Author ID: 334652
  • Email: heinz.bauschke@ubc.ca
  • Xianfu Wang
  • Affiliation: Department of Mathematics, Irving K. Barber School, UBC Okanagan, Kelowna, British Columbia, Canada V1V 1V7
  • MR Author ID: 601305
  • Email: shawn.wang@ubc.ca
  • Received by editor(s): May 10, 2007
  • Received by editor(s) in revised form: October 2, 2007
  • Published electronically: April 17, 2009
  • © Copyright 2009 American Mathematical Society
    The copyright for this article reverts to public domain 28 years after publication.
  • Journal: Trans. Amer. Math. Soc. 361 (2009), 5947-5965
  • MSC (2000): Primary 52A41, 47N10; Secondary 47H05
  • DOI: https://doi.org/10.1090/S0002-9947-09-04698-4
  • MathSciNet review: 2529920