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New Formulas for the Fenchel Subdifferential of the Conjugate Function

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Abstract

Following (López and Volle, J Convex Anal 17, 2010) we provide new formulas for the Fenchel subdifferential of the conjugate of functions defined on locally convex spaces. In particular, this allows deriving expressions for the minimizers set of the lower semicontinuous convex hull of such functions. These formulas are written by means of primal objects related to the subdifferential of the initial function, namely a new enlargement of the Fenchel subdifferential operator.

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References

  1. Benoist, J., Hiriart-Urruty, J.-B.: What is the subdifferential of the closed convex hull of a function? SIAM J. Math. Anal. 27(6), 1661–1679 (1996)

    Article  MATH  MathSciNet  Google Scholar 

  2. Borwein, J.M., Vanderwerff, J.: Differentiability of conjugate functions and perturbed minimization principles. J. Convex Anal. 16(3 & 4), 707–711 (2009)

    MATH  MathSciNet  Google Scholar 

  3. Correa, R., Seeger, A.: Directional derivative of a minimax function. Nonlinear Anal. 9(1), 13–22 (1985)

    Article  MATH  MathSciNet  Google Scholar 

  4. Griewank, A., Rabier, P.J.: On the smoothness of convex envelopes. Trans. Am. Math. Soc. 322, 691–709 (1991)

    Article  MathSciNet  Google Scholar 

  5. Hantoute, A.: Subdifferential set of the supremum of lower semi-continuous convex functions and the conical hull intersection property. Top 14(2), 355–374 (2006)

    Article  MATH  MathSciNet  Google Scholar 

  6. Hantoute, A., López, M.A.: A complete characterization of the subdifferential set of the supremum of an arbitrary family of convex functions. J. Convex Anal. 15(4), 831–858 (2008)

    MATH  MathSciNet  Google Scholar 

  7. Hantoute, A., López, M.A., Zălinescu, C.: Subdifferential calculus rules in convex analysis: a unifying approach via pointwise supremum functions. SIAM J. Optim. 19(2), 863–882 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  8. Hiriart-Urruty, J.-B., Lemaréchal, C.: Convex Analysis and Minimization Algorithms I, II. Springer, Berlin (1993)

    Google Scholar 

  9. Hiriart-Urruty, J.-B., López, M.A., Volle, A.: The ε-strategy in variational analysis: illustration with the closed convexification of a function. Rev. Mat. Iberoam. (2010, in press)

  10. Hiriart-Urruty, J.-B., Moussaoui, M., Seeger, A., Volle, M.: Subdifferential calculus without qualification conditions, using approximate subdifferentials: a survey. Nonlinear Anal. 24(12), 1727–1754 (1995)

    Article  MATH  MathSciNet  Google Scholar 

  11. Jofré, A., Penot, J.-B.: A note on the directional derivative of a marginal function. Rev. Mat. Apl. 14(2), 37–54 (1993)

    MATH  MathSciNet  Google Scholar 

  12. Kirchheim, B., Kristensen, J.: Differentiability of convex envelopes. C. R. Acad. Sci. Paris, Sér. I Math. 333(8), 725–728 (2001)

    MATH  MathSciNet  Google Scholar 

  13. López, M.A., Volle, M.: A formula for the set of optimal solutions of a relaxed minimization problem. Applications to subdifferential calculus. J. Convex Anal. 17(3–4), 1057–1075 (2010). http://www.heldermann-verlag.de/jca/jca17/jca0851.pdf

    MATH  Google Scholar 

  14. López, M.A., Volle, M.: On the subdifferential of the supremum of an arbitrary family of extended real-valued functions. RACSAM Rev. R. Acad. Cienc. Exactas Fis. Nat., Ser. A Mat. (2010, in press)

  15. Mordukhovich, B.S.: Variational Analysis and Generalized Differentiation I. Basic Theory. Springer, Berlin (2006)

    Google Scholar 

  16. Rockafellar, R.T.: Convex Analysis. Princeton University Press, Princeton (1970)

    MATH  Google Scholar 

  17. Soloviov, V.: Duality for nonconvex optimization and its applications. Anal.Math. 19(4), 297–315 (1993)

    Article  MATH  MathSciNet  Google Scholar 

  18. Volle, M.: Complements on subdifferential calculus. Pac. J. Optim. 4(3), 621–628 (2008)

    MATH  MathSciNet  Google Scholar 

  19. Zălinescu, C.: Convex Analysis in General Vector Spaces. World Scientific Publishing Co., Inc., River Edge (2002)

    Book  MATH  Google Scholar 

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Correspondence to Abderrahim Hantoute.

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Bere 60. urtebetetzea dela eta, Jean-Baptiste Hiriart-urruty eskainia (To Jean-Baptiste Hiriart-Urruty, on the occasion of his sixtieth birthday).

Research supported by Project Fondecyt Number 1080173.

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Correa, R., Hantoute, A. New Formulas for the Fenchel Subdifferential of the Conjugate Function. Set-Valued Anal 18, 405–422 (2010). https://doi.org/10.1007/s11228-010-0152-x

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  • DOI: https://doi.org/10.1007/s11228-010-0152-x

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