Abstract
This paper deals with some properties of convex functions and their applications to problems of the calculus of variations, both in the convex case, where Rockafellar is one of the main experts in the world, and also in the quasiconvex case, a field which still is not completely understood.
References
- M. Amar, M. Chiricotto, L. Giacomelli, G. Riey: Mass-constrained minimization of a one-homogeneous functional arising in strain-gradient plasticity, J. Math. Analysis Appl. 397 (2013) 381–401.https://doi.org/10.1016/j.jmaa.2012.07.054Google Scholar
- J. Ball: Convexity conditions and existence theorems in nonlinear elasticity, Arch. Rational Mech. Analysis 6 (1976) 337–403.https://doi.org/10.1007/BF00279992Google Scholar
- V. Boegelein, B. Dacorogna, F. Duzaar, P. Marcellini, C. Scheven: Integral convexity and parabolic systems, SIAM J. Math. Analysis 52 (2020) 1489–1525.https://doi.org/10.1137/19M1287870Google Scholar
- B. Botteron, P. Marcellini: A general approach to the existence of minimizers of one-dimensional non-coercive integrals of the calculus of variations, Ann. Inst. Henri Poincaré, (C) Analyse Non Linéaire 8 (1991) 197–223.https://doi.org/10.1016/s0294-1449(16)30272-4Google Scholar
- G. Buttazzo: Semicontinuity, Relaxation and Integral Representation in the Calculus of Variations, Pitman Research Notes in Mathematics Vol. 207, Longman, Harlow (1989).Google Scholar
- G. Buttazzo, M. Giaquinta, S. Hildebrandt: One-dimensional Variational Problems: An Introduction, Oxford Lecture Series in Mathematics and its Applications, Clarendon Press, Oxfird (1998).https://doi.org/10.1093/oso/9780198504658.001.0001Google Scholar
- R. Correa, P. Gajardo, L. Thibault: Various Lipschitz-like properties for functions and sets. I: Directional derivative and tangential characterizations, SIAM J. Optimization 20 (2010) 1766–1785.https://doi.org/10.1137/080738271Google Scholar
- G. Cupini, P. Marcellini, E. Mascolo: Regularity of minimizers under limit growth conditions, Nonlinear Analysis 153 (2017) 294–310.https://doi.org/10.1016/j.na.2016.06.002Google Scholar
- G. Cupini, P. Marcellini, E. Mascolo: Nonuniformly elliptic energy integrals with p, q-growth, Nonlinear Analysis 177 (2018) 312–324.https://doi.org/10.1016/j.na.2018.03.018Google Scholar
- G. Cupini, P. Marcellini, E. Mascolo: Local boundedness of weak solutions to elliptic equations with p, q-growth, Math. Eng. 5/3 (2023), art.no. 65, 28p.https://doi.org/10.3934/mine.2023065Google Scholar
- G. Cupini, P. Marcellini, E. Mascolo: Regularity for nonuniformly elliptic equations with p, q-growth and explicit x, u-dependence, Arch. Rational Mech. Anal. 248/4 (2024), art.no. 60, 45p.https://doi.org/10.1007/s00205-024-01982-0Google Scholar
- G. Cupini, P. Marcellini, E. Mascolo: The Leray-Lions existence theorem under general growth conditions, J. Diff. Equations 416 (2025) 1405–1428.https://doi.org/10.1016/j.jde.2024.10.025Google Scholar
- G. Cupini, P. Marcellini, E. Mascolo, A. Passarelli di Napoli: Lipschitz regularity for degenerate elliptic integrals with p, q-growth, Adv. Calc. Var. 16 (2023) 443–465.https://doi.org/10.1515/acv-2020-0120Google Scholar
- B. Dacorogna: Direct Methods in the Calculus of Variations, Applied Mathematical Sciences Vol. 78, Springer, New York (1989).https://doi.org/10.1007/978-3-642-51440-1Google Scholar
- B. Dacorogna, P. Marcellini: Existence of minimizers for non-quasiconvex integrals, Arch. Rational Mech. Analysis 131 (1995) 359–399.https://doi.org/10.1007/BF00380915Google Scholar
- B. Dacorogna, P. Marcellini: Cauchy-Dirichlet problem for first order nonlinear systems, J. Funct. Analysis 152 (1998) 404–446.https://doi.org/10.1006/jfan.1997.3172Google Scholar
- C. De Filippis: Quasiconvexity and partial regularity via nonlinear potentials, J. Math. Pures Appl. 163 (2022) 11–82.https://doi.org/10.1016/j.matpur.2022.05.001Google Scholar
- C. De Filippis, C. Koch, J. Kristensen: Quantified Legendreness and the regularity of minima, Arch. Rational Mech. Analysis 248/4 (2024), art.no. 69, 51p.https://doi.org/10.1007/s00205-024-02008-5Google Scholar
- C. De Filippis, G. Mingione: Lipschitz bounds and nonautonomous integrals, Arch. Rational Mech. Analysis 242 (2021) 973–1057.https://doi.org/10.1007/s00205-021-01698-5Google Scholar
- T. Di Marco, P. Marcellini: A-priori gradient bound for elliptic systems under either slow or fast growth conditions, Calc. Var. Partial Diff. Equations 59/4 (2020), art.no. 120, 26p.https://doi.org/10.1007/s00526-020-01769-7Google Scholar
- M. Eleuteri, P. Marcellini, E. Mascolo: Regularity for scalar integrals without structure conditions, Adv. Calc. Var. 13 (2020) 279–300.https://doi.org/10.1515/acv-2017-0037Google Scholar
- M. Eleuteri, P. Marcellini, E. Mascolo, S. Perrotta: Local Lipschitz continuity for energy integrals with slow growth, Ann. Mat. Pura Appl. 201 (2022) 1005–1032.https://doi.org/10.1007/s10231-021-01147-wGoogle Scholar
- M. Eleuteri, A. Passarelli di Napoli: Lipschitz regularity of minimizers of variational integrals with variable exponents, Nonlinear Analysis Real World Appl. 71 (2023), art.no. 103815, 25p.https://doi.org/10.1016/j.nonrwa.2022.103815Google Scholar
- I. Ekeland, R. Temam: Convex Analysis and Variational Problems, Classics in Applied Mathematics, Society for Industrial and Applied Mathematics, Philadelphia (1999).https://doi.org/10.1137/1.9781611971088Google Scholar
- N. Fusco, P. Marcellini, C. Sbordone: Mathematical Analysis. Functions of Several Real Variables and Applications, Unitext Vol. 137, Springer, Cham (2022).https://doi.org/10.1007/978-3-031-04151-8Google Scholar
- C. Marcelli: Coercivity of integral functionals with non-everywhere superlinear lagrangians, Adv. Calc. Var. 12 (2019) 447–458.https://doi.org/10.1515/acv-2017-0014Google Scholar
- P. Marcellini: A Relation between Existence of Minima for Non Convex Integrals and Uniqueness for Non Strictly Convex Integrals of the Calculus of Variations, Lecture Notes in Mathematics Vol. 979, Springer, Berlin (1983) 216–231.https://doi.org/10.1007/BFb0066256Google Scholar
- P. Marcellini: Quasiconvex quadratic forms in two dimensions, Appl. Math. Optimization 11 (1984) 183–189.https://doi.org/10.1007/BF01442177Google Scholar
- P. Marcellini: Approximation of quasiconvex functions, and lower semicontinuity of multiple integrals, Manuscripta Math. 51 (1985) 1–28.https://doi.org/10.1007/BF01168345Google Scholar
- P. Marcellini, C. Sbordone: An approach to the asymptotic behaviour of elliptic-parabolic operators, J. Math. Pures Appl. 56 (1977) 157–182.Google Scholar
- P. Marcellini, C. Sbordone: Homogenization of non-uniformly elliptic operators, Applicable Analysis 8 (1978) 101–113.https://doi.org/10.1080/00036817808839219Google Scholar
- C. B. Morrey: Morrey Multiple Integrals in the Calculus of Variations, Springer, Berlin (1966).https://doi.org/10.1007/978-3-540-69952-1Google Scholar
- R. T. Rockafellar: Convex Analysis, Princeton Mathematical Series Vol. 30, Princeton (1970).https://doi.org/10.1515/9781400873173Google Scholar
- R. T. Rockafellar: Clarke’s tangent cones and the boundaries of closed sets in Rn, Nonlinear Analysis 3 (1978) 145–154.https://doi.org/10.1016/0362-546X(79)90044-0Google Scholar
- R. T. Rockafellar: Directionally Lipschitzian functions and subdifferential calculus, Proc. London Math. Soc. 39 (1979) 331–355.https://doi.org/10.1112/plms/s3-39.2.331Google Scholar
- R. T. Rockafellar: Generalized directional derivatives and subgradients of nonconvex functions, Canad. J. Math. 32 (1980) 257–280.https://doi.org/10.4153/CJM-1980-020-7Google Scholar
- M. A. Sychev: Another theorem of classical solvability ‘in small’ for one-dimensional variational problems, Arch. Rational Mech. Analysis 202 (2011) 269–294.https://doi.org/10.1007/s00205-011-0416-0Google Scholar
- L. Thibault: Unilateral Variational Analysis in Banach Spaces. Part I and II, World Scientific, Singapore (2023).https://doi.org/10.1142/12797Google Scholar
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Published by Heldermann Verlag, 2025. Rights now held by Banach Press.
