We give an answer to an open problem regarding the full enlargeability of a maximal monotone operator S:X⇉X∗S:X\rightrightarrows X^* by SseS^{se}, the smallest enlargement belonging to a certain class of enlargements associated to SS. Moreover, we prove the weak∗^* closedness of the set ShS(ε1,x)+ThT(ε2,x)S_{h_S}(\varepsilon_1,x)+T_{h_T} (\varepsilon_2,x) under a weak generalized interior regularity condition.

Contact details are reproduced from the original publication and may be historical.

  1. H. H. Bauschke: Fenchel duality, Fitzpatrick functions and the extension of firmly nonexpansive mappings, Proc. Amer. Math. Soc. 135(1) (2007) 135–139.https://doi.org/10.1090/S0002-9939-06-08770-3Google Scholar
  2. J. M. Borwein: Maximality of sums of two maximal monotone operators in general Banach space, Proc. Amer. Math. Soc. 135(12) (2007) 3917–3924.https://doi.org/10.1090/S0002-9939-07-08960-5Google Scholar
  3. R. I. Boţ, E. R. Csetnek, G. Wanka: A new condition for maximal monotonicity via representative functions, Nonlinear Anal., Theory Methods Appl. 67A(8) (2007) 2390–2402.https://doi.org/10.1016/j.na.2006.09.006Google Scholar
  4. R. I. Boţ, S.-M. Grad, G. Wanka: Maximal monotonicity for the precomposition with a linear operator, SIAM J. Optim. 17(4) (2006) 1239–1252.https://doi.org/10.1137/050641491Google Scholar
  5. R. I. Boţ, S.-M. Grad, G. Wanka: Weaker constraint qualifications in maximal monotonicity, Numer. Funct. Anal. Optimization 28(1–2) (2007) 27–41.https://doi.org/10.1080/01630560701190224Google Scholar
  6. R. I. Boţ, S.-M. Grad, G. Wanka: Generalized Moreau-Rockafellar results for composed convex functions, Optimization 58(7–8) (2009), to appear.https://doi.org/10.1080/02331930902945082Google Scholar
  7. A. Brøndsted, R. T. Rockafellar: On the subdifferential of convex functions, Proc. Amer. Math. Soc. 16 (1965) 605–611.https://doi.org/10.1090/S0002-9939-1965-0178103-8Google Scholar
  8. R. S. Burachik, A. N. Iusem: On non-enlargeable and fully enlargeable monotone operators, J. Convex Analysis 13(3–4) (2006) 603–622.https://doi.org/10.68381/jca13047Google Scholar
  9. R. S. Burachik, A. N. Iusem: Set-valued Mappings and Enlargements of Monotone Operators, Springer Optimization and its Applications 8, Springer, New York (2008).Google Scholar
  10. R. S. Burachik, A. N. Iusem, B. F. Svaiter: Enlargement of monotone operators with applications to variational inequalities, Set-Valued Anal. 5(2) (1997) 159–180.https://doi.org/10.1023/A:1008615624787Google Scholar
  11. R. S. Burachik, B. F. Svaiter: ε-enlargements of maximal monotone operators in Banach spaces, Set-Valued Anal. 7(2) (1999) 117–132.https://doi.org/10.1023/A:1008730230603Google Scholar
  12. R. S. Burachik, B. F. Svaiter: Maximal monotone operators, convex functions and a special family of enlargements, Set-Valued Anal. 10(4) (2002) 297–316.https://doi.org/10.1023/A:1020639314056Google Scholar
  13. R. S. Burachik, B. F. Svaiter: Operating enlargements of monotone operators: new connections with convex functions, Pac. J. Optim. 2(3) (2006) 425–445.Google Scholar
  14. I. Ekeland, R. Temam: Convex Analysis and Variational Problems, North-Holland, Amsterdam (1976).Google Scholar
  15. S. Fitzpatrick: Representing monotone operators by convex functions, in: Functional Analysis and Optimization, Workshop / Miniconference (Canberra, 1988), Proc. Cent. Math. Anal. Aust. Natl. Univ. 20, Australian National University, Canberra (1988) 59–65.Google Scholar
  16. Y. García, M. Lassonde, J. P. Revalski: Extended sums and extended compositions of monotone operators, J. Convex Analysis 13(3–4) (2006) 721–738.https://doi.org/10.68381/jca13054Google Scholar
  17. M. Marques Alves, B. F. Svaiter: Brønsted-Rockafellar property and maximality of monotone operators representable by convex functions in non-reflexive Banach spaces, J. Convex Analysis 15(4) (2008) 693–706.https://doi.org/10.68381/jca15047Google Scholar
  18. M. Marques Alves, B. F. Svaiter: A new old class of maximal monotone operators, J. Convex Analysis 16(3&4) (2009) 881–890.https://doi.org/10.68381/jca16053Google Scholar
  19. J. E. Martínez-Legaz, B. F. Svaiter: Monotone operators representable by l.s.c. convex functions, Set-Valued Anal. 13(1) (2005) 21–46.https://doi.org/10.1007/s11228-004-4170-4Google Scholar
  20. J. E. Martínez-Legaz, M. Théra: ε-subdifferentials in terms of subdifferentials, Set-Valued Anal. 4(4) (1996) 327–332.https://doi.org/10.1007/BF00436109Google Scholar
  21. J. E. Martínez-Legaz, M. Théra: A convex representation of maximal monotone operators, J. Nonlinear Convex Anal. 2(2) (2001) 243–247.Google Scholar
  22. J.-P. Penot: The relevance of convex analysis for the study of monotonicity, Nonlinear Anal., Theory Methods Appl. 58A(7–8) (2004) 855–871.https://doi.org/10.1016/j.na.2004.05.018Google Scholar
  23. J.-P. Penot, C. Zălinescu: Bounded convergence for perturbed minimization problems, Optimization 53(5–6) (2004) 625–640.https://doi.org/10.1080/02331930412331328570Google Scholar
  24. J. P. Penot, C. Zălinescu: Some problems about the representation of monotone operators by convex functions, ANZIAM J. 47(1) (2005) 1–20.https://doi.org/10.1017/S1446181100009731Google Scholar
  25. J. P. Revalski, M. Théra: Enlargements and sums of monotone operators, Nonlinear Anal., Theory Methods Appl. 48A(4) (2002) 505–519.https://doi.org/10.1016/S0362-546X(00)00201-7Google Scholar
  26. R. T. Rockafellar: On the maximal monotonicity of subdiferential mappings, Pac. J. Math. 33(1) (1970) 209–216.https://doi.org/10.2140/pjm.1970.33.209Google Scholar
  27. S. Simons: Minimax and Monotonicity, Springer, Berlin (1998).https://doi.org/10.1007/BFb0093633Google Scholar
  28. S. Simons: From Hahn-Banach to Monotonicity, Springer, Berlin (2008).Google Scholar
  29. S. Simons, C. Zălinescu: Fenchel duality, Fitzpatrick functions and maximal monotonicity, J. Nonlinear Convex Anal. 6(1) (2005) 1–22.Google Scholar
  30. B. F. Svaiter: A family of enlargements of maximal monotone operators, Set-Valued Anal. 8(4) (2000) 311–328.https://doi.org/10.1023/A:1026555124541Google Scholar
  31. D. Torralba: Convergence Épigraphique et Changements d’Échelle en Analyse Variationnelle et Optimisation. Applications aux Transitions de Phases et à la Méthode Barrière Logarithmique, PhD Thesis, Université Montpellier II, Montpellier (1996).Google Scholar
  32. A. Verona, M. Verona: Regular maximal monotone operators and the sum theorem, J. Convex Analysis 7(1) (2000) 115–128.https://doi.org/10.68381/jca07006Google Scholar
  33. M. D. Voisei, C. Zălinescu: Strongly-representable monotone operators, J. Convex Analysis 16(3&4) 1035–1038.https://doi.org/10.68381/jca16064Google Scholar
  34. C. Zălinescu: Convex Analysis in General Vector Spaces, World Scientific, Singapore (2002).https://doi.org/10.1142/5021Google Scholar
  35. C. Zălinescu: A new proof of the maximal monotonicity of the sum using the Fitzpatrick function, in: Variational Analysis and Applications, F. Giannessi, A. Maugeri (eds.), Nonconvex Optimization and its Applications 79, Springer, New York (2005) 1159–1172.https://doi.org/10.1007/0-387-24276-7_66Google Scholar

R. I. Boţ, E. R. Csetnek. “On Two Properties of Enlargements of Maximal Monotone Operators.” Journal of Convex Analysis 16 (2009), No. 3&4, 713–725. https://doi.org/10.68381/jca16043